Home » Public Forums » GMCnet » Final Drive Install Questions
| Final Drive Install Questions [message #299435] |
Thu, 21 April 2016 20:53  |
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thainglo
Messages: 132
Registered: March 2015
Location: Iowa
Karma: 2
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Senior Member |
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Does anyone have a write up for swapping out final drive units? I picked one up today from Russ Nolan, a GMCer in Chicago and going to get racy to dig into this soon. I searched all thru this site and the photo site and couldn't find any good step by step directions. Surprising, because everything I've done to my coach in the last year has been so well documented by the experts that it made e job easy. I therefore think I am somehow issuing something in my searches.
I did come across a great cradle idea that will help, and Applied GMC has a basic text document that I've printed out.
If anyone has leads or links, I'd greatly appreciate it.
Matt
Matt Sladek
1976 Eleganza II
Coralville, IA
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| Re: [GMCnet] Final Drive Install Questions [message #299437 is a reply to message #299435] |
Thu, 21 April 2016 21:14  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Talk to Manny. Anyone who can RNR a gmc trans in 5 hours with the final
drive in place surely can give you a step by step. I helped(stayed out of
the way) him rnr my trans in a gravel driveway last year. Nothing short of
miraculous.
Sully
77 Royale
Seattle.
On Thursday, April 21, 2016, Matt Sladek wrote:
> Does anyone have a write up for swapping out final drive units? I picked
> one up today from Russ Nolan, a GMCer in Chicago and going to get racy to
> dig into this soon. I searched all thru this site and the photo site and
> couldn't find any good step by step directions. Surprising, because
> everything I've done to my coach in the last year has been so well
> documented by the experts that it made e job easy. I therefore think I am
> somehow
> issuing something in my searches.
>
> I did come across a great cradle idea that will help, and Applied GMC has
> a basic text document that I've printed out.
>
> If anyone has leads or links, I'd greatly appreciate it.
>
> Matt
> --
> Matt Sladek
> 1976 Eleganza II
> Coralville, IA
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Final Drive Install Questions [message #299439 is a reply to message #299435] |
Thu, 21 April 2016 21:33 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Matt,
See Maintenance Manual X-7525 / Section 3 - Final Drive / Page 3C - 7 / Final Drive / Removal. Installation follows.
Regards,
Rob M.
USAussie - Downunder
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Matt Sladek
Sent: Thursday, April 21, 2016 8:54 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Final Drive Install Questions
Does anyone have a write up for swapping out final drive units? I picked one up today from Russ Nolan, a GMCer in Chicago and going
to get racy to dig into this soon. I searched all thru this site and the photo site and couldn't find any good step by step
directions. Surprising, because everything I've done to my coach in the last year has been so well documented by the experts that it
made e job easy. I therefore think I am somehow issuing something in my searches.
I did come across a great cradle idea that will help, and Applied GMC has a basic text document that I've printed out.
If anyone has leads or links, I'd greatly appreciate it.
Matt
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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] Final Drive Install Questions [message #299440 is a reply to message #299437] |
Thu, 21 April 2016 21:29 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Matt.
Our sheet is ok to use as a guide and always call us and ask for Nick or
myself to go over it verbally as we have done them ad or mechanics do it
our way.
On Thu, Apr 21, 2016 at 7:14 PM, Todd Sullivan wrote:
> Talk to Manny. Anyone who can RNR a gmc trans in 5 hours with the final
> drive in place surely can give you a step by step. I helped(stayed out of
> the way) him rnr my trans in a gravel driveway last year. Nothing short of
> miraculous.
>
> Sully
> 77 Royale
> Seattle.
>
> On Thursday, April 21, 2016, Matt Sladek wrote:
>
>> Does anyone have a write up for swapping out final drive units? I picked
>> one up today from Russ Nolan, a GMCer in Chicago and going to get racy to
>> dig into this soon. I searched all thru this site and the photo site and
>> couldn't find any good step by step directions. Surprising, because
>> everything I've done to my coach in the last year has been so well
>> documented by the experts that it made e job easy. I therefore think I am
>> somehow
>> issuing something in my searches.
>>
>> I did come across a great cradle idea that will help, and Applied GMC has
>> a basic text document that I've printed out.
>>
>> If anyone has leads or links, I'd greatly appreciate it.
>>
>> Matt
>> --
>> Matt Sladek
>> 1976 Eleganza II
>> Coralville, IA
>>
>> _______________________________________________
>> 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
>
--
Jim Kanomata
Applied/GMC, Fremont,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: [GMCnet] Final Drive Install Questions [message #299441 is a reply to message #299439] |
Thu, 21 April 2016 21:37 |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Senior Member |
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Could you be a little more specific, Rob ?
Mike in NS...currently irritated at those who won't sign up on the Black
List
On Thu, Apr 21, 2016 at 11:33 PM, Rob Mueller
wrote:
> Matt,
>
> See Maintenance Manual X-7525 / Section 3 - Final Drive / Page 3C - 7 /
> Final Drive / Removal. Installation follows.
>
> Regards,
> Rob M.
> USAussie - Downunder
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Matt
> Sladek
> Sent: Thursday, April 21, 2016 8:54 PM
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Final Drive Install Questions
>
> Does anyone have a write up for swapping out final drive units? I picked
> one up today from Russ Nolan, a GMCer in Chicago and going
> to get racy to dig into this soon. I searched all thru this site and the
> photo site and couldn't find any good step by step
> directions. Surprising, because everything I've done to my coach in the
> last year has been so well documented by the experts that it
> made e job easy. I therefore think I am somehow issuing something in my
> searches.
>
> I did come across a great cradle idea that will help, and Applied GMC has
> a basic text document that I've printed out.
>
> If anyone has leads or links, I'd greatly appreciate it.
>
> Matt
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
Life is too short to hold a grudge; slash some tires and call it even !
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| Re: [GMCnet] Final Drive Install Questions [message #299443 is a reply to message #299435] |
Thu, 21 April 2016 21:47 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Matt
A few hints. Be sure to tack glue the gasket between the final drive and transmission in place before raising the final drive and use care that you don't rip it. Use two long bolts in the bottom holes. Those will act as "rails" so that the final drive engages properly. After putting in the rest of the bolts replace those with the proper bolts.
The upper left bolt (looking at it from the front) is almost impossible to get in. I have done it with a flex joint and a long extension but it's ok to just leave it out. That also makes it easier to remove the final drive in the future.
I have installed mine twice by myself balancing it on a floor jack while getting the long bolts into the bottom holes but it would be easier to have a helper.
Emery Stora
77 Kingsley
Frederick, CO
> On Apr 21, 2016, at 7:53 PM, Matt Sladek wrote:
>
> Does anyone have a write up for swapping out final drive units? I picked one up today from Russ Nolan, a GMCer in Chicago and going to get racy to
> dig into this soon. I searched all thru this site and the photo site and couldn't find any good step by step directions. Surprising, because
> everything I've done to my coach in the last year has been so well documented by the experts that it made e job easy. I therefore think I am somehow
> issuing something in my searches.
>
> I did come across a great cradle idea that will help, and Applied GMC has a basic text document that I've printed out.
>
> If anyone has leads or links, I'd greatly appreciate it.
>
> Matt
> --
> Matt Sladek
> 1976 Eleganza II
> Coralville, IA
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: [GMCnet] Final Drive Install Questions [message #299445 is a reply to message #299435] |
Thu, 21 April 2016 22:04 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Matt,
I don't have detailed instructions nor photos, but I do have a some
suggestions that may be useful:
1. The most difficult part of the task, IMHO, is doing the assembly
without damaging the gasket. To eliminate that problem, I made a gasket
guard: A plastic gasket (mine was 3/8" thick, but 1/8" would be plenty)
identical to that to go between the FD and transmission was cut. Then cut
that plastic gasket into two pieces, slotting the holes in such a way that
the gasket will stay in place during assembly, but can be removed after FD
& tran. are mated. Place the gasket on the trans., then the 2-piece
plastic guard just made, then mount the FD. Now remove the 2 piece gasket
guard before snugging up the FD by tightening the bolts. Oh -- be sure
you're using the correct laminated gasket set with the ventilation holes at
the top; otherwise you'll have FD lube leaks.
2. Install 2 studs at the bottom of the transmission to guide the FD into
position; slots in their outer ends make them easy to remove when the FD is
secured with other bolts.
3. The cradle you've located may be a better idea, but just in case: I
use a support device made from a heavy steel plate bent into an L, large
enough to bolt the vertical leg to the driver's side axle flange of the FD
with two bolts. On the horizontal leg, extending UNDER the FD, either afix
a large enough nub (beneath the center of the FD) to replace that on the
bottom of your floor jack's saddle, or bolt that flange to the top of the
jack. Now the main weight of the FD can be supported by the jack while the
FD's aligned on the aforementioned studs and bolted in place. Attachment
to the axle flange allows the FD to be tilted fore and aft for alignment.
Since the exposed driver's side axle flange is fixed in space by the
adapter, you'll need to devise a way to reach into the passenger side axle
cavity and turn the half-axle socket there. You'll probably need to do
that to align the splines between the FD and the transmission. The
half-axle can be used, but somewhat clumsily.
Oh yeah. Almost forgot: 4. IF you have a clean work area and can keep
debris out of the FD with the cover removed, do so -- the extra 1+" of
space between the steering cross link and the transmission will make the
whole job easier.
HTH,
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc., etc.
www.gmcwipersetc.com
On Thu, Apr 21, 2016 at 9:53 PM, Matt Sladek wrote:
> Does anyone have a write up for swapping out final drive units? I picked
> one up today from Russ Nolan, a GMCer in Chicago and going to get racy to
> dig into this soon. I searched all thru this site and the photo site and
> couldn't find any good step by step directions. Surprising, because
> everything I've done to my coach in the last year has been so well
> documented by the experts that it made e job easy. I therefore think I am
> somehow
> issuing something in my searches.
>
> I did come across a great cradle idea that will help, and Applied GMC has
> a basic text document that I've printed out.
>
> If anyone has leads or links, I'd greatly appreciate it.
>
> Matt
> --
> Matt Sladek
> 1976 Eleganza II
> Coralville, IA
>
> _______________________________________________
> 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
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Final Drive Install Questions [message #299449 is a reply to message #299444] |
Thu, 21 April 2016 22:21 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Manny,
That was the second one i have ever done back 15 years ago and I had one
heck of a time stopping a transmission leak till Bob Lamey came over and
suggested I use RTV around the O ring.
I know your sitting back and laughing at me again.
You showed me few tricks and learned from that.
People have a hard time believing me when I tell them you can drop a trans
and install a new one and drive off in around 3 1/2 hours.
On Thu, Apr 21, 2016 at 7:50 PM, Manny Trovao wrote:
> On Thu, Apr 21, 2016 at 7:29 PM, Jim Kanomata
> wrote:
>
>> Matt.
>> Our sheet is ok to use as a guide and always call us and ask for Nick or
>> myself to go over it verbally as we have done them ad or mechanics do it
>> our way.
>> I once tried to watch Jim remove and install one of his lower ratio units
>> on a customer's coach at a rally. It took him all day. Hope his technique
>> has improved ducking
>>
> --
> Manny Trovao
> mannystrans@gmail.com
> http://www.mannystransmission.biz/
> Manny's Trans / Power Drive
> San Jose, California
> 408-937-1583
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,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: [GMCnet] Final Drive Install Questions [message #299450 is a reply to message #299448] |
Thu, 21 April 2016 22:26 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Matt,
That's correct, you'll need a 12 point socket for the axle flange bolts --
3/8" IIRC.
In describing the gasket guard, I should have mentioned that the holes
where the studs are to be removed need not be slotted -- just remove the
guard after the studs are removed.
IIRC, the manual does not mention that the top inner bolt is nearly
impossible to reach. Hopefully, yours is not installed. If it is, you'll
probably have to buy or make what we used to call a "starter wrench". It's
a closed end wrench with a sharp lateral curve so that you can reach
beneath the manifold/header and turn that bolt -- about 1 flat at a time.
When reinstalling the FD, don't even try to re-install that bolt -- it will
never be missed.
Ken H.
On Thu, Apr 21, 2016 at 11:17 PM, Matt Sladek wrote:
> Thanks for the tips! I pulled my FSM out just a few minutes ago and it
> does give some good info, better than other jobs I've tried to use it for
> reference.
>
> Looks like I'm going to have to scrounge for some old cutting board. I
> liked Ken H's design for the gasket protector and experience tells me I
> shouldn't cut up any of the wife's things.
>
> Are there any special sockets required to unbolt the axle shafts? I seem
> to recall 12-point fasteners when I was last under there, but that was
> several months ago...
>
> Thanks again for all the great help!
>
> Matt
> --
> Matt Sladek
> 1976 Eleganza II
> Coralville, IA
>
> _______________________________________________
> 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] Final Drive Install Questions [message #299451 is a reply to message #299449] |
Thu, 21 April 2016 22:49 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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So my question asking cost an hour and a half?
😜
Sully
77 Royale
Seattle
On Thursday, April 21, 2016, Jim Kanomata wrote:
> Manny,
> That was the second one i have ever done back 15 years ago and I had one
> heck of a time stopping a transmission leak till Bob Lamey came over and
> suggested I use RTV around the O ring.
> I know your sitting back and laughing at me again.
> You showed me few tricks and learned from that.
> People have a hard time believing me when I tell them you can drop a trans
> and install a new one and drive off in around 3 1/2 hours.
>
>
> On Thu, Apr 21, 2016 at 7:50 PM, Manny Trovao > wrote:
>
>> On Thu, Apr 21, 2016 at 7:29 PM, Jim Kanomata >
>> wrote:
>>
>>> Matt.
>>> Our sheet is ok to use as a guide and always call us and ask for Nick
> or
>>> myself to go over it verbally as we have done them ad or mechanics do
> it
>>> our way.
>>> I once tried to watch Jim remove and install one of his lower ratio
> units
>>> on a customer's coach at a rally. It took him all day. Hope his
> technique
>>> has improved ducking
>>>
>> --
>> Manny Trovao
>> mannystrans@gmail.com
>> http://www.mannystransmission.biz/
>> Manny's Trans / Power Drive
>> San Jose, California
>> 408-937-1583
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Final Drive Install Questions [message #299520 is a reply to message #299457] |
Fri, 22 April 2016 20:01 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We use RTV to augment the O ring seal, seem to work for all our GMC shops..
On Fri, Apr 22, 2016 at 4:47 AM, Matt Sladek wrote:
> Speaking of RTV around the O-ring (I'm assuming for the trans dipstick
> tube), I couldn't find a part number for the O-ring. Is it just a common
> ring
> that would probably be in my mass O-ring case?
> --
> Matt Sladek
> 1976 Eleganza II
> Coralville, IA
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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