Home » Public Forums » GMCnet » [GMCnet] Limited Slip Differential
| Re: [GMCnet] Limited Slip Differential [message #238030 is a reply to message #237625] |
Wed, 29 January 2014 20:44   |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""You do not want a locker in the front.
Short Story Time ......
My father bought a 1966 Jeep Wagoneer. Manual trans, V-8 (AMC 327) and with lockers in both ends. It was delivered that way. Because we had a few Jeeps, my father knew that one should lock the front hubs during break-because you needed to break-in the front differential as well. He got out in the parking lot and locked both hubs (Kelly not Warn) and went to pull out of the lot. There was a hole in the traffic and he fired into it expecting to turn left. It didn't. It jerked the steering straight and that blew one of the power steering hoses. He ended up driving over the divider and into the parking lot across the road. When he was there again to pickup repaired vehicle, he was shown a manufacture's service note about just this very subject.
Matt""
LSD's in FWD cars are mild when it comes to limiting speed differentials. FDW is very sensitive to any tendency to control the natural action of the differential. When we first brought out the 1980 X cars, we welded the diffs so that we could run them on 2 wheels for PR purposes. One of our drivers suffered a broken arm when the steering violently whipped back to the straight ahead position. Modern electronic LSD's make it much more viable for FWD.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Limited Slip Differential [message #238102 is a reply to message #238070] |
Thu, 30 January 2014 11:27 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Now you guys have me totally confused about whether to get Jims LSD or not when I upgrade to 3.70s
So Jim H, Bob, Matt.. LSD, Yay or Nay?
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Limited Slip Differential [message #238112 is a reply to message #238102] |
Thu, 30 January 2014 12:49 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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I have the 355 from Jim k and it works better with every mile. One thing it seems to keep getting better with as it breaks in is the engagement. The engagement seems to that it is becoming smoother and more consistent. I live at the bottom of a very steep hill which is flanked by large maple trees. In the past I have had to hit the hill with a big head of steam to make it up without getting stuck in a one wheel peel. Now I can torque up it very slow and when it starts to loose traction back off the throttle until it grabs hold. Then with very little throttle the front dif will switch power to the wheels as needed and chug right up the hill. I cannot speak for its performance in snow and ice cause I have been able to avoid drivin it in those conditions.
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 30, 2014, at 9:27 AM, Keith V <my427v8@hotmail.com> wrote:
>
>
>
> Now you guys have me totally confused about whether to get Jims LSD or not when I upgrade to 3.70s
>
> So Jim H, Bob, Matt.. LSD, Yay or Nay?
> --
> Keith
> 69 Vette
> 29 Dodge
> 75 Royale GMC
> Mounds View. MN
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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] Limited Slip Differential [message #238113 is a reply to message #238102] |
Thu, 30 January 2014 13:10 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Keith V wrote on Thu, 30 January 2014 12:27 |
Now you guys have me totally confused about whether to get Jims LSD or not when I upgrade to 3.70s
So Jim H, Bob, Matt.. LSD, Yay or Nay?
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I don't have one in the coach, but I had one in a PL AlCR (a Neon shaped race car that I drove on the street), it was great on slippery stuff and I could actually do a hole-shot on gravel.
If I can ever work it, I will get a 3.55 LSD in my coach. The only reason for the 3.55 instead of 3.77 is that my coach is a very light 23' and we don't tow.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Limited Slip Differential [message #238192 is a reply to message #238159] |
Fri, 31 January 2014 08:33 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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I'm sure I will end up with some snow data about the LSD in the not too distant future. I will certainly have data about driving off road and in sand pulling a trailer as all of the venues my son and I will be frequenting this off road motorcycle racing season are desolate, off the beaten path type places. I've been casually shopping items like these. AAA is awesome.If you are in an area with cell coverage.
http://www.amazon.com/ARB-72X10US-Recovery-General-Accessories/dp/B004P9GX9O/ref=cm_cr_pr_product_top
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 30, 2014, at 4:40 PM, Espen Heitmann <bimet@online.no> wrote:
>
>
>
> Snow chains work on grass to, no problem 8)
>
> No seriously, on normal roads without any snow and ice I would have bought a LSD from Jim and I am sure there would only have benefits with it, and not much snow in CA and FL anyways :)
>
> http://s1126.photobucket.com/user/Espen_Heitmann/media/1973%20Sequoia/1653867_10151942685623660_255342892_n_zpsc3e0aae5.jpg.html
>
>
> --
> 1973 26' Parrot green Seqouia in Norway
> "Loffen" translates to white bread, it is also a nick name for your.. well you know..down there.. and it was my dog's name, but hey you can also call me Espen ;)
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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] Limited Slip Differential [message #238198 is a reply to message #238102] |
Fri, 31 January 2014 10:35 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Keith V wrote on Thu, 30 January 2014 10:27 |
Now you guys have me totally confused about whether to get Jims LSD or not when I upgrade to 3.70s
So Jim H, Bob, Matt.. LSD, Yay or Nay?
|
Keith--I think I was guilty of story telling. I would have no hesitation going with the LSD as offered.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Limited Slip Differential [message #238204 is a reply to message #238198] |
Fri, 31 January 2014 11:00 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Having been stuck on wet grass with my GMC, and observing several coaches
equipped with limited slip, my comment would go something like this: "If
you use your coach in traction conditions that require it, the LSD makes a
good deal of sense." Greg Birch has some humungous mud and snow tires on
his coach, and he takes it in marginal traction situations without limited
slip. He carries kitty litter and shovels, etc. When I asked him if he had
one, his response was "nah, we just dig her out and get out and push".
But, he is young and exuberant. The rest of us, Todd Sullivan included,
use limited slip diff's. I have very little experience in ice or snow with
the GMC, so I cannot comment on how they work there. Someone once told me
about a captain of a ship who was asked about which qualities set a great
skipper apart from a mediocre one. His reply was something like "The mark
of a great skipper is to keep his vessel out of situations that demanded
his superior navigation and seamanship." Might apply to GMC'S in snow too.
Jim Hupy
Salem, Or
78 GMC Royale 403
On Jan 31, 2014 8:35 AM, "Bob de Kruyff" <NEXT2POOL@aol.com> wrote:
>
>
> Keith V wrote on Thu, 30 January 2014 10:27
> > Now you guys have me totally confused about whether to get Jims LSD or
> not when I upgrade to 3.70s
> >
> > So Jim H, Bob, Matt.. LSD, Yay or Nay?
>
> Keith--I think I was guilty of story telling. I would have no hesitation
> going with the LSD as offered.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Limited Slip Differential [message #238210 is a reply to message #238204] |
Fri, 31 January 2014 12:13 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Well put Jim.
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 31, 2014, at 9:00 AM, James Hupy <jamesh1296@gmail.com> wrote:
>
> Having been stuck on wet grass with my GMC, and observing several coaches
> equipped with limited slip, my comment would go something like this: "If
> you use your coach in traction conditions that require it, the LSD makes a
> good deal of sense." Greg Birch has some humungous mud and snow tires on
> his coach, and he takes it in marginal traction situations without limited
> slip. He carries kitty litter and shovels, etc. When I asked him if he had
> one, his response was "nah, we just dig her out and get out and push".
> But, he is young and exuberant. The rest of us, Todd Sullivan included,
> use limited slip diff's. I have very little experience in ice or snow with
> the GMC, so I cannot comment on how they work there. Someone once told me
> about a captain of a ship who was asked about which qualities set a great
> skipper apart from a mediocre one. His reply was something like "The mark
> of a great skipper is to keep his vessel out of situations that demanded
> his superior navigation and seamanship." Might apply to GMC'S in snow too.
> Jim Hupy
> Salem, Or
> 78 GMC Royale 403
>> On Jan 31, 2014 8:35 AM, "Bob de Kruyff" <NEXT2POOL@aol.com> wrote:
>>
>>
>>
>> Keith V wrote on Thu, 30 January 2014 10:27
>>> Now you guys have me totally confused about whether to get Jims LSD or
>> not when I upgrade to 3.70s
>>>
>>> So Jim H, Bob, Matt.. LSD, Yay or Nay?
>>
>> Keith--I think I was guilty of story telling. I would have no hesitation
>> going with the LSD as offered.
>> --
>> Bob de Kruyff
>> 78 Eleganza
>> Chandler, AZ
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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] Limited Slip Differential [message #238216 is a reply to message #238192] |
Fri, 31 January 2014 12:54 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Todd,
Can we take it from that comment that AAA doesn't have the provision that
Allstate & some others have in their towing contract: "...on public
road..."?
Ken H.
On Fri, Jan 31, 2014 at 9:33 AM, Todd Sullivan <sgltrac@gmail.com> wrote:
> I'm sure I will end up with some snow data about the LSD in the not too
> distant future. I will certainly have data about driving off road and in
> sand pulling a trailer as all of the venues my son and I will be
> frequenting this off road motorcycle racing season are desolate, off the
> beaten path type places. I've been casually shopping items like these. AAA
> is awesome.If you are in an area with cell coverage.
...
>
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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] Limited Slip Differential [message #238221 is a reply to message #238216] |
Fri, 31 January 2014 13:37 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Actually I was referring to the ability to contact them in an area with no cell coverage Ken.
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 31, 2014, at 10:54 AM, Ken Henderson <hend4800@bellsouth.net> wrote:
>
> Todd,
>
> Can we take it from that comment that AAA doesn't have the provision that
> Allstate & some others have in their towing contract: "...on public
> road..."?
>
> Ken H.
>
>> On Fri, Jan 31, 2014 at 9:33 AM, Todd Sullivan <sgltrac@gmail.com> wrote:
>>
>> I'm sure I will end up with some snow data about the LSD in the not too
>> distant future. I will certainly have data about driving off road and in
>> sand pulling a trailer as all of the venues my son and I will be
>> frequenting this off road motorcycle racing season are desolate, off the
>> beaten path type places. I've been casually shopping items like these. AAA
>> is awesome.If you are in an area with cell coverage.
>
> ...
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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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] Limited Slip Differential [message #238226 is a reply to message #238212] |
Fri, 31 January 2014 14:25 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Senior Member |
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mike, I believe the switch pitch, 3.21:1 ratio differential is a torsen style differential, using a sun and planetary gear versus the spider gears.
This was from the Toronados, many have installed in their GMCs
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
[Updated on: Fri, 31 January 2014 14:26] Report message to a moderator |
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