TD New Guy
Join Date: Dec 2005
Location: Tooele, UT
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I can't say, other than the 3000GTs have a better design. Unless I'm mistaken, the 3si transfer case is driven off the ring gear, not one side of the differential.
All I am saying is that if you want to stress the Caravan AWD system, lock everything up. If every wheel has equal traction, then no problem. But as soon as one of the three wheels driven off the one side of the diff loses traction, or one has more traction, bang... Remember, the PTU replaces the right extension housing on the trans, takes the same space as the intermediate shaft on the turbo 4s. Remember a couple years back when Gary Donovan broke a diff housing clean off a trans? I can see this happening with a PTU in the right circumstances.
If you watch rock crawling, you see all wheels locked a lot. OK, when you use known weak components with big tires, parts break. I wouldn't use 35" tires on my Grand Cherokee and go rock crawling. Granted with the AWD system, you aren't using big tires, but you will be giving ridiculous stresses in a dragrace launch. With three wheels locked, there will be a problem. Kind of why you don't drive a part time 4x4 system engaged on the street. There has to be some give in the system somewhere. If driven on the street. This whole discussion is completely irrelavent if you are talking about a track only system.
I AM NOT, trying to discourage. Just trying to explain.
And even the DSM crowd sees their transfer case as a weak link...