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Old 07-20-2007, 08:56 AM   #2 (permalink)
joe_padavano
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Join Date: Mar 2007
Location: Northern VA
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Quote:
Originally Posted by brian j combs View Post
Hello there, I'm new to this whole forum thingy so please bear with me.
My brother recently completed a sandrail utilizing an Olds toronado 455 and transaxle.
I understand that there were a number of different front drive motorhomes made with this combo using I believe a 5.13, or something like that, ring and pinion.
With the paddle tires being quite a bit larger than on the car, the stock gearing is way to tall.
How much more difficult is it to change the gearing in the transaxle compared to a normal rearend?

http://www.geocities.com/rkusiek/Sandrail.html
As you probably know, the diff housing unbolts from the rest of the transaxle, making it easy to work on. You do need a case spreader to get the carrier out. These show up on ebay every so often. I'm not aware of gear sets any steeper than mid-3s. Certainly there were no such factory gear sets, even in the motorhomes. There IS quite a following of the GMC Toro-based motorhomes, so there may be aftermarket gears available. I seriously doubt, however, that a motorhome with a 455 Olds would be able to use a 5.13 gear set. Depending on tire size, you'd really be winding that big block on the freeway.
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Joe Padavano

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