Home » Public Forums » GMCnet » Looking for 3.21 final drive (My final drive I think is on borrowed time- but have good trip report)
| Looking for 3.21 final drive [message #323375] |
Tue, 05 September 2017 08:56  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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Just thought I would toss this out there.
Had a great trip yesterday hauling 10 people down to the MN state fair. Gmc performed well and everybody had a great time. I am not a big fan of the state fairs, but for doing the driving s friend of mine, who happens to be good friends with the headliner, hooked us up with full access back stage passes for Sam Hunt at the grand stand.
My original 3.07 final drive has a whine, that I am fairly certain at this point is the final drive. It has been whining a long time now, and i have drained and put new fluid in. I know i need to get it fixed, and I did pick up another 3.07 that I may end up putting in soon, and after driving down though
The metro yesterday, thinking the drive could very well grenade leaving my coach and the 10 people on board in a mess, that I really need to get it done.
My preference is to go to a 3.21. I know this may start the posts of what final drive is best and I am aware of the options.
I am just wondering if anybody out there has a 3.21 collecting dust, that they are ready to part with, or have one that needs a total rebuild sitting around. I have been looking for a core lately, and junkyards seem to not have much of a supply.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Looking for 3.21 final drive [message #323378 is a reply to message #323375] |
Tue, 05 September 2017 09:18  |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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Senior Member |
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Ask Rick Denney if he thinks going to a 3.21 is such a great idea. Yes it may be cheaper than
an alternate ratio from Jim K. but it doesn't sound like he is having fun. A 3.21 vs a 3.07
is not very much of a change for the amount of work it seems to be.
If you have another good 3.07 you could swap in that an then use the 3.07 you took out
a a core to get a new assembled different ratio from Jim K. Yes probably more money
than a 3.21 from the men's mall but brand new gears and bearings(I presume) and Jim K.s
support if anything goes wrong
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: Looking for 3.21 final drive [message #323386 is a reply to message #323375] |
Tue, 05 September 2017 10:26 |
jhb1
Messages: 303
Registered: February 2004
Karma: 0
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Senior Member |
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John Biwersi and Larry W put one in my coach when I was stranded a few years ago. Made a nice difference in how the coach behaved seems to give me a little more power at my cruising speed 65ish. Now have more than 30,000 miles on it.
HTH
John H. Bell
77 Royale; QuadBag,Manny OneTon,Honda EV4010, FITech
Montreal Qc.
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| Re: [GMCnet] Looking for 3.21 final drive [message #323390 is a reply to message #323378] |
Tue, 05 September 2017 11:04 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Dave,
I have two 3.21 final drives, one installed in the Avion here in the USA and one to be installed in the Avion in Australia. I have
all the brackets for both and had no problems installing the one in the USA and therefore do not anticipate any problems with the
one in Australia.
Rick Denny is installing it along with a 1 ton front end and IIRC he doesn't have one of the brackets.
I drive Double Trouble at the speed limit whatever it may be and it will cruise all day long at 70 mph easily. Because the ratio is
not as low as a 3.55 it will not accelerated as quickly but it's fine for me. I don't care about my mileage so I don't know what the
effect on that is.
It is highly unlikely to find a 1966 or 1967 in a junkyard at this point in time. You can obtain a 3.21 from John Biwersi or Manny.
I found one of mine on eBay for $200.00. I opened it up, inspected it and wound up spending a few bucks on new seals which was all
it needed.
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Dave King
Sent: Tuesday, September 5, 2017 9:19 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Looking for 3.21 final drive
Ask Rick Denney if he thinks going to a 3.21 is such a great idea. Yes it may be cheaper than
an alternate ratio from Jim K. but it doesn't sound like he is having fun. A 3.21 vs a 3.07
is not very much of a change for the amount of work it seems to be.
If you have another good 3.07 you could swap in that an then use the 3.07 you took out
a a core to get a new assembled different ratio from Jim K. Yes probably more money
than a 3.21 from the men's mall but brand new gears and bearings(I presume) and Jim K.s
support if anything goes wrong
--
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Looking for 3.21 final drive [message #323392 is a reply to message #323375] |
Tue, 05 September 2017 11:10 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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Manny has them, but only fully rebuilt.
The intermediate shaft is special to the 3.21, and Manny modifies them to
accept the better and more available bracket bearing and seals used by the
3.07 intermediate shaft. Once in many dozens of these that he has sold, the
bracket isn't straight (or something), and that once just happened to be
the one he sent me.
But I would not condemn your plan because of that. The 3.21 uses a
planetary differential rather than a spider and is known to be more robust.
Using a 3.21 directly, though, leaves you with a smaller bracket bearing
that is no longer available, and a single-lip seal.
Rick "what I know" Denney
On Tue, Sep 5, 2017 at 10:26 AM Jon Roche wrote:
> Just thought I would toss this out there.
>
> Had a great trip yesterday hauling 10 people down to the MN state fair.
> Gmc performed well and everybody had a great time. I am not a big fan of
> the state fairs, but for doing the driving s friend of mine, who happens
> to be good friends with the headliner, hooked us up with full access back
> stage passes for Sam Hunt at the grand stand.
>
> My original 3.07 final drive has a whine, that I am fairly certain at
> this point is the final drive. It has been whining a long time now, and i
> have drained and put new fluid in. I know i need to get it fixed, and I
> did pick up another 3.07 that I may end up putting in soon, and after
> driving down though
> The metro yesterday, thinking the drive could very well grenade leaving
> my coach and the 10 people on board in a mess, that I really need to get it
> done.
>
> My preference is to go to a 3.21. I know this may start the posts of what
> final drive is best and I am aware of the options.
>
> I am just wondering if anybody out there has a 3.21 collecting dust, that
> they are ready to part with, or have one that needs a total rebuild
> sitting around. I have been looking for a core lately, and junkyards
> seem to not have much of a supply.
>
>
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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| Re: [GMCnet] Looking for 3.21 final drive [message #323394 is a reply to message #323392] |
Tue, 05 September 2017 11:34 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Rick,
As I read that, the bracket from Manny is, itself, unmodified 3.07. If
that's true, why don't you try using the presumably good bracket you
removed originally?
I'm sure you thought of that, just wondering the rationale that caused you
to not do it.
Ken H.
On Tue, Sep 5, 2017 at 12:10 PM, Richard Denney wrote:
> Manny has them, but only fully rebuilt.
>
> The intermediate shaft is special to the 3.21, and Manny modifies them to
> accept the better and more available bracket bearing and seals used by the
> 3.07 intermediate shaft. Once in many dozens of these that he has sold, the
> bracket isn't straight (or something), and that once just happened to be
> the one he sent me.
>
> But I would not condemn your plan because of that. The 3.21 uses a
> planetary differential rather than a spider and is known to be more robust.
>
> Using a 3.21 directly, though, leaves you with a smaller bracket bearing
> that is no longer available, and a single-lip seal.
>
> Rick "what I know" Denney
>
> On Tue, Sep 5, 2017 at 10:26 AM Jon Roche wrote:
>
>> Just thought I would toss this out there.
>>
>> Had a great trip yesterday hauling 10 people down to the MN state fair.
>> Gmc performed well and everybody had a great time. I am not a big fan
> of
>> the state fairs, but for doing the driving s friend of mine, who happens
>> to be good friends with the headliner, hooked us up with full access back
>> stage passes for Sam Hunt at the grand stand.
>>
>> My original 3.07 final drive has a whine, that I am fairly certain at
>> this point is the final drive. It has been whining a long time now,
> and i
>> have drained and put new fluid in. I know i need to get it fixed, and
> I
>> did pick up another 3.07 that I may end up putting in soon, and after
>> driving down though
>> The metro yesterday, thinking the drive could very well grenade leaving
>> my coach and the 10 people on board in a mess, that I really need to
> get it
>> done.
>>
>> My preference is to go to a 3.21. I know this may start the posts of
> what
>> final drive is best and I am aware of the options.
>>
>> I am just wondering if anybody out there has a 3.21 collecting dust,
> that
>> they are ready to part with, or have one that needs a total rebuild
>> sitting around. I have been looking for a core lately, and junkyards
>> seem to not have much of a supply.
>>
>>
>>
>>
>> --
>> Jon Roche
>> 75 palm beach
>> St. Cloud, MN
>> http://lqqkatjon.blogspot.com/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> Rick Denney
> 73 x-Glacier 230 "Jaws"
> Off-list email to rick at rickdenney dot com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Looking for 3.21 final drive [message #323396 is a reply to message #323394] |
Tue, 05 September 2017 12:02 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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I don't have the tool to drive on the bearing. The factory tool is a pipe
of just the right diameter to bear on the inner race to press the
bracket-with-bearing onto the shaft. (The same tool drives on the dust cap).
The bearing has to come off the shaft--the bracket won't fit over the
flange.
I was going to try to find something that would work, but when Manny told
me he'd send me a replacement, I set it aside to work on other things. I
didn't know not to expect it, after all.
I will try it, but with being sick in bed this last weekend and on travel
this week (and last, and the week before, and the week before), I'm
seriously into time debt. I suspect Manny knows that feeling.
Rick "hijacking the thread" Denney
On Tue, Sep 5, 2017 at 12:36 PM Ken Henderson
wrote:
> Rick,
>
> As I read that, the bracket from Manny is, itself, unmodified 3.07. If
> that's true, why don't you try using the presumably good bracket you
> removed originally?
>
> I'm sure you thought of that, just wondering the rationale that caused you
> to not do it.
>
> Ken H.
>
>
> On Tue, Sep 5, 2017 at 12:10 PM, Richard Denney
> wrote:
>
>> Manny has them, but only fully rebuilt.
>>
>> The intermediate shaft is special to the 3.21, and Manny modifies them to
>> accept the better and more available bracket bearing and seals used by
> the
>> 3.07 intermediate shaft. Once in many dozens of these that he has sold,
> the
>> bracket isn't straight (or something), and that once just happened to be
>> the one he sent me.
>>
>> But I would not condemn your plan because of that. The 3.21 uses a
>> planetary differential rather than a spider and is known to be more
> robust.
>>
>> Using a 3.21 directly, though, leaves you with a smaller bracket bearing
>> that is no longer available, and a single-lip seal.
>>
>> Rick "what I know" Denney
>>
>> On Tue, Sep 5, 2017 at 10:26 AM Jon Roche wrote:
>>
>>> Just thought I would toss this out there.
>>>
>>> Had a great trip yesterday hauling 10 people down to the MN state fair.
>>> Gmc performed well and everybody had a great time. I am not a big fan
>> of
>>> the state fairs, but for doing the driving s friend of mine, who
> happens
>>> to be good friends with the headliner, hooked us up with full access
> back
>>> stage passes for Sam Hunt at the grand stand.
>>>
>>> My original 3.07 final drive has a whine, that I am fairly certain at
>>> this point is the final drive. It has been whining a long time now,
>> and i
>>> have drained and put new fluid in. I know i need to get it fixed,
> and
>> I
>>> did pick up another 3.07 that I may end up putting in soon, and after
>>> driving down though
>>> The metro yesterday, thinking the drive could very well grenade
> leaving
>>> my coach and the 10 people on board in a mess, that I really need to
>> get it
>>> done.
>>>
>>> My preference is to go to a 3.21. I know this may start the posts of
>> what
>>> final drive is best and I am aware of the options.
>>>
>>> I am just wondering if anybody out there has a 3.21 collecting dust,
>> that
>>> they are ready to part with, or have one that needs a total rebuild
>>> sitting around. I have been looking for a core lately, and junkyards
>>> seem to not have much of a supply.
>>>
>>>
>>>
>>>
>>> --
>>> Jon Roche
>>> 75 palm beach
>>> St. Cloud, MN
>>> http://lqqkatjon.blogspot.com/
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> --
>> Rick Denney
>> 73 x-Glacier 230 "Jaws"
>> Off-list email to rick at rickdenney dot com
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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| Re: [GMCnet] Looking for 3.21 final drive [message #323397 is a reply to message #323390] |
Tue, 05 September 2017 12:22 |
fbhtxak
Messages: 191
Registered: April 2006
Karma: 0
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Senior Member |
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Jon,
From Maintenance Manual X-7525:
"Final drive gears are not absolutely quiet and are
acceptable unless some abnormal noise is present."
A "whine" was present in my "3.07" when I bought the motorhome at 20K miles
25 years ago from the original owner. The owner (and his selling/servicing
dealer) insisted that the "whine" was a characteristic of the gearbox. I
reluctantly accepted that explanation and confirmed it when I bought the
service manuals (i.e., "some noise is normal"). The noise did not change
over the next 120K miles. When I had the motorhome at Cinnabar in November
for the OEM "403" engine to be changed out, I had them also change out the
OEM "3.07" for their GM "3.42". I changed out both preemptively as neither
showed any signs of imminent failure at 140K miles The replacement
"Paterson" engine ("403") and the "3.42" resulted in a substantial
improvement in drivetrain performance.
Fred Hudspeth
Fred Hudspeth
1978 Royale (TZE 368V101335) - Tyler, TX
1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
Message: 12
Date: Tue, 05 Sep 2017 07:56:45 -0600
From: Jon Roche
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Looking for 3.21 final drive
Message-ID:
Content-Type: text/plain; charset="utf-8"
Just thought I would toss this out there.
Had a great trip yesterday hauling 10 people down to the MN state fair.
Gmc performed well and everybody had a great time. I am not a big fan of
the state fairs, but for doing the driving s friend of mine, who happens to
be good friends with the headliner, hooked us up with full access back
stage passes for Sam Hunt at the grand stand.
My original 3.07 final drive has a whine, that I am fairly certain at this
point is the final drive. It has been whining a long time now, and i
have drained and put new fluid in. I know i need to get it fixed, and I
did pick up another 3.07 that I may end up putting in soon, and after
driving down though
The metro yesterday, thinking the drive could very well grenade leaving my
coach and the 10 people on board in a mess, that I really need to get it
done.
My preference is to go to a 3.21. I know this may start the posts of what
final drive is best and I am aware of the options.
I am just wondering if anybody out there has a 3.21 collecting dust, that
they are ready to part with, or have one that needs a total rebuild
sitting around. I have been looking for a core lately, and junkyards seem
to not have much of a supply.
--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
**************
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| Re: [GMCnet] Looking for 3.21 final drive [message #323398 is a reply to message #323397] |
Tue, 05 September 2017 12:41 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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Fred,
Aftef 100K miles, motorhome final drives usually have too much axial play
on the input shaft (there should be about 8 thousandths, which is hard to
feel). Manny tells me this can damage the transmission, but I doubt it
makes any special noise.
My old final drive (103K miles) didn't create noticeable whine, but the
shaft probably had 50 thousandths axial play. It was also nearly dry--we
poured only a few ounces of tar-like oil out of it. Manny didn't even want
it touching his new transmission, but I had to get home. It worked fine,
but for how long?
We looked at several replaced-by-shorter-gears 3.07's that all had similar
play. The only old final drive that didn't was a 2.73 or whatever, and had
done passenger car service.
Ken's final drive created a new whine (not that he could hear it--SHE
noticed it), and one day recently it locked up solid and sheared the inner
CV joints of both half-shafts.
I would submit that any change in noise produced by a final drive is worthy
of immediate attention, as is too many miles.
Rick "thinking they work fine until they don't" Denney
On Tue, Sep 5, 2017 at 1:22 PM Fred Hudspeth wrote:
> Jon,
>
> From Maintenance Manual X-7525:
>
> "Final drive gears are not absolutely quiet and are
> acceptable unless some abnormal noise is present."
>
>
>
> A "whine" was present in my "3.07" when I bought the motorhome at 20K miles
> 25 years ago from the original owner. The owner (and his selling/servicing
> dealer) insisted that the "whine" was a characteristic of the gearbox. I
> reluctantly accepted that explanation and confirmed it when I bought the
> service manuals (i.e., "some noise is normal"). The noise did not change
> over the next 120K miles. When I had the motorhome at Cinnabar in November
> for the OEM "403" engine to be changed out, I had them also change out the
> OEM "3.07" for their GM "3.42". I changed out both preemptively as neither
> showed any signs of imminent failure at 140K miles The replacement
> "Paterson" engine ("403") and the "3.42" resulted in a substantial
> improvement in drivetrain performance.
>
> Fred Hudspeth
>
>
> Fred Hudspeth
> 1978 Royale (TZE 368V101335) - Tyler, TX
> 1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
>
>
> Message: 12
> Date: Tue, 05 Sep 2017 07:56:45 -0600
> From: Jon Roche
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Looking for 3.21 final drive
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> Just thought I would toss this out there.
>
> Had a great trip yesterday hauling 10 people down to the MN state fair.
> Gmc performed well and everybody had a great time. I am not a big fan of
> the state fairs, but for doing the driving s friend of mine, who happens
> to
> be good friends with the headliner, hooked us up with full access back
> stage passes for Sam Hunt at the grand stand.
>
> My original 3.07 final drive has a whine, that I am fairly certain at this
> point is the final drive. It has been whining a long time now, and i
> have drained and put new fluid in. I know i need to get it fixed, and I
> did pick up another 3.07 that I may end up putting in soon, and after
> driving down though
> The metro yesterday, thinking the drive could very well grenade leaving my
> coach and the 10 people on board in a mess, that I really need to get it
> done.
>
> My preference is to go to a 3.21. I know this may start the posts of what
> final drive is best and I am aware of the options.
>
> I am just wondering if anybody out there has a 3.21 collecting dust, that
> they are ready to part with, or have one that needs a total rebuild
> sitting around. I have been looking for a core lately, and junkyards
> seem
> to not have much of a supply.
>
>
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
>
>
> **************
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
_______________________________________________
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Unsubscribe or Change List Options:
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| Re: [GMCnet] Looking for 3.21 final drive [message #323407 is a reply to message #323397] |
Tue, 05 September 2017 14:30 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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You might think I'm tooting my own horn so take it for what it's worth as
we have been handling the lower gears since they were introduced in 1990.
We had several people doing it, and now we and Cinnabar are the only ones
left.
If you understand engine torque, you'll see that our engine starts to work
best around 2,600 rpm.
with the 3.70 you get there sooner 55-60mph.
No, your gas milage WILL NOT SUFFER. When you operate in the torque range,
the Vacuum will be high and the carb will run lean and the vacuum advance
will increase and give your more power and milage.
We have several people running the 4.10 ratio as they drive no faster than
65mph and still get same milage.
When we have sold over 3,000 units since
1994 people know what work for the.
Also the Limited Slip option is something worth considering.
It does help the traction on our coaches.
9
On Tue, Sep 5, 2017 at 10:22 AM, Fred Hudspeth
wrote:
> Jon,
>
> From Maintenance Manual X-7525:
>
> "Final drive gears are not absolutely quiet and are
> acceptable unless some abnormal noise is present."
>
>
>
> A "whine" was present in my "3.07" when I bought the motorhome at 20K miles
> 25 years ago from the original owner. The owner (and his selling/servicing
> dealer) insisted that the "whine" was a characteristic of the gearbox. I
> reluctantly accepted that explanation and confirmed it when I bought the
> service manuals (i.e., "some noise is normal"). The noise did not change
> over the next 120K miles. When I had the motorhome at Cinnabar in November
> for the OEM "403" engine to be changed out, I had them also change out the
> OEM "3.07" for their GM "3.42". I changed out both preemptively as neither
> showed any signs of imminent failure at 140K miles The replacement
> "Paterson" engine ("403") and the "3.42" resulted in a substantial
> improvement in drivetrain performance.
>
> Fred Hudspeth
>
>
> Fred Hudspeth
> 1978 Royale (TZE 368V101335) - Tyler, TX
> 1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
>
>
> Message: 12
> Date: Tue, 05 Sep 2017 07:56:45 -0600
> From: Jon Roche
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Looking for 3.21 final drive
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> Just thought I would toss this out there.
>
> Had a great trip yesterday hauling 10 people down to the MN state fair.
> Gmc performed well and everybody had a great time. I am not a big fan of
> the state fairs, but for doing the driving s friend of mine, who happens
> to
> be good friends with the headliner, hooked us up with full access back
> stage passes for Sam Hunt at the grand stand.
>
> My original 3.07 final drive has a whine, that I am fairly certain at this
> point is the final drive. It has been whining a long time now, and i
> have drained and put new fluid in. I know i need to get it fixed, and I
> did pick up another 3.07 that I may end up putting in soon, and after
> driving down though
> The metro yesterday, thinking the drive could very well grenade leaving my
> coach and the 10 people on board in a mess, that I really need to get it
> done.
>
> My preference is to go to a 3.21. I know this may start the posts of what
> final drive is best and I am aware of the options.
>
> I am just wondering if anybody out there has a 3.21 collecting dust, that
> they are ready to part with, or have one that needs a total rebuild
> sitting around. I have been looking for a core lately, and junkyards
> seem
> to not have much of a supply.
>
>
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
>
>
> **************
>
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Looking for 3.21 final drive [message #323411 is a reply to message #323375] |
Tue, 05 September 2017 16:38 |
bobby5832708
Messages: 237
Registered: November 2006
Location: Winter Springs FL
Karma: 3
|
Senior Member |
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Jon,
I've got a 3.21 diff that's been taking up room in my garage. Here's the story in case you're interested in it:
I bought the diff a few years ago, put in new output shaft seals, and had a local shop press on a new output shaft bearing. I ran it in my GMC for a couple of years and then went back to the 3.07 diff (for the driving I do the 3.07 is the better ratio). I have the diff, output shaft, mounting brackets and bolt (the bolt is a different size). The 3.21 has been sitting in my garage taking up space, it's time for a new home. I will sell it to you for what I've got into it (somewhere about $150) plus shipping.
Let me know if interested.
Bob Heller
2017 Winnebago 29VE
Winter Springs FL
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| Re: Looking for 3.21 final drive [message #323412 is a reply to message #323375] |
Tue, 05 September 2017 17:16 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
|
Senior Member |
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Bob
I will send you a PM. I am interested in that final drive.
Shuffling kids around after school, so i will get back with you.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
[Updated on: Tue, 05 September 2017 18:37] Report message to a moderator |
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