Home » Public Forums » GMCnet » [GMCnet] Limited Slip Differential
| Re: [GMCnet] Limited Slip Differential [message #238237 is a reply to message #238226] |
Fri, 31 January 2014 16:34   |
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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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Sean,
Unfortunately the 3.21 to 1 final drive used in the 66 and 67 Toronados is not a torsen style differential; it is a planetary gear
differential.
Here's an exploded view out of the manual for it:
http://www.gmcmhphotos.com/photos/member-galleries/p33111-3-21-final-drive.html
Here's a link to the manual for it (5mb) on Bdub's website: http://www.bdub.net/manuals/1967_Toronado_3.21_Planetary_Final_Drive.pdf
Here's a link to the switch pitch transmission manual (22mb) that it was attached to:
http://www.bdub.net/manuals/1967_Toronado_Switch_Pitch_Transmission.pdf
Regards,
Rob M.
Sydney, Australia
-----Original Message-----
From: Sean Kidd
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.
--
Sean
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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] Limited Slip Differential [message #238274 is a reply to message #237531] |
Fri, 31 January 2014 18:55 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Thanks for the correction, so the only difference in the 3.21 is the planetary versus spider gear, still uses a ring and pinion....the 3.21 looks more robust, why did GM change it?
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 18:56] Report message to a moderator |
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| Re: [GMCnet] Limited Slip Differential [message #238280 is a reply to message #238192] |
Fri, 31 January 2014 19:16 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| sgltrac wrote on Fri, 31 January 2014 07:33 |
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
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Todd,
I have has a 3.70 LSD for over fuur years now and can provide some data on my experience towing my Jeep to the sand dunes and driving on hilly dirt roads:
Two out of four years, I have needed a tug to get going after stopping at our parking/camping spot. It seems to depend on how long ago it rained before we got there. I am also running wider all terrain tires on the front, on 8" wide rims. If I had aired down, I might not have needed the tug.
http://www.gmcmhphotos.com/photos/towing-etc/p41602-sand-dunes-2011.html
We have also negotiated about 8 miles of mountainous dirt road to get to one of our favorite summer destinations, Burro Mountain Homestead, near Silver City. The last hill, just before the entry to the campground, is pretty steep and gravelly. I could feel the traction shifting from one wheel to the other as I drove up it.
Bottom line; the limited slip is not harsh enough to feel on the street, but definitely adds traction off the pavement. I have never tried to drive the coach in snow or ice, but I think the results would be the same. Overuse of the skinny pedal, under slippery conditions, could get you in trouble just like any Limited slip or locker equipped vehicle.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Limited Slip Differential [message #238283 is a reply to message #238276] |
Fri, 31 January 2014 19:26 |
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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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| USAussie wrote on Fri, 31 January 2014 20:02 |
Sean,
Regards,
Rob M.
PS - I see you're from Joisey; where abouts?
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We're in Sussex county...north west nj, Skylands region, about 10 miles from the Appalachian trail. Our town is the fluorescent mineral capital of the world...
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
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| Re: [GMCnet] Limited Slip Differential [message #238308 is a reply to message #238280] |
Fri, 31 January 2014 21:21 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Thanks Carl. I don't want to end up as "that guy" who gets stuck and blocks the ingress or egress route.
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 31, 2014, at 5:16 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
>
> sgltrac wrote on Fri, 31 January 2014 07:33
>> 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
>
>
>
> Todd,
>
> I have has a 3.70 LSD for over fuur years now and can provide some data on my experience towing my Jeep to the sand dunes and driving on hilly dirt roads:
>
> Two out of four years, I have needed a tug to get going after stopping at our parking/camping spot. It seems to depend on how long ago it rained before we got there. I am also running wider all terrain tires on the front, on 8" wide rims. If I had aired down, I might not have needed the tug.
>
> http://www.gmcmhphotos.com/photos/towing-etc/p41602-sand-dunes-2011.html
>
> We have also negotiated about 8 miles of mountainous dirt road to get to one of our favorite summer destinations, Burro Mountain Homestead, near Silver City. The last hill, just before the entry to the campground, is pretty steep and gravelly. I could feel the traction shifting from one wheel to the other as I drove up it.
>
> Bottom line; the limited slip is not harsh enough to feel on the street, but definitely adds traction off the pavement. I have never tried to drive the coach in snow or ice, but I think the results would be the same. Overuse of the skinny pedal, under slippery conditions, could get you in trouble just like any Limited slip or locker equipped vehicle.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> 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 #238311 is a reply to message #238308] |
Fri, 31 January 2014 21:54 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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| sgltrac wrote on Fri, 31 January 2014 20:21 |
Thanks Carl. I don't want to end up as "that guy" who gets stuck and blocks the ingress or egress route.
Todd Sullivan
Sully
77 royale
Seattle
> On Jan 31, 2014, at 5:16 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
>
> sgltrac wrote on Fri, 31 January 2014 07:33
>> 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
>
>
>
> Todd,
>
> I have has a 3.70 LSD for over fuur years now and can provide some data on my experience towing my Jeep to the sand dunes and driving on hilly dirt roads:
>
> Two out of four years, I have needed a tug to get going after stopping at our parking/camping spot. It seems to depend on how long ago it rained before we got there. I am also running wider all terrain tires on the front, on 8" wide rims. If I had aired down, I might not have needed the tug.
>
> http://www.gmcmhphotos.com/photos/towing-etc/p41602-sand-dunes-2011.html
>
> We have also negotiated about 8 miles of mountainous dirt road to get to one of our favorite summer destinations, Burro Mountain Homestead, near Silver City. The last hill, just before the entry to the campground, is pretty steep and gravelly. I could feel the traction shifting from one wheel to the other as I drove up it.
>
> Bottom line; the limited slip is not harsh enough to feel on the street, but definitely adds traction off the pavement. I have never tried to drive the coach in snow or ice, but I think the results would be the same. Overuse of the skinny pedal, under slippery conditions, could get you in trouble just like any Limited slip or locker equipped vehicle.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Todd,
I have never had an issue with getting stuck, even in deep sand, as long as I was able to keep moving. It's getting going after stopping that's the problem. Of course, you can't always control what's happening in front of you.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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