Re: Quadra-Trac Versus Quadra-Drive

We were talking about a woman who traded in a 1999 GC for a 2003 or 2004. My guess is that the new car will be traded in long before these types of problems show up. ...Unless of course the Quadra-Trac II is a new development for this model year, in which case all bets are off.

Earle

Most of the computers I work with have had a long life. I have a radio shack model 100 laptop and an okidata printer that are of 1983-4 vintage. Both still working fine. Maybe the difference is the extreme conditions the auto components are subjected to.

Either way, you are right about the cost of replacement parts. And for whatever reason, electronic parts for autos seem to be priced far beyond what it must cost to produce them in the first place.

I am hoping that the 7 yr, 100,000 mile extended warranty I purchased will afford some protection at least up to 100,000 miles.

Larry

The link is to a description of Quadra Drive, and according to the original post in this thread, the new GCs use something called "Quadra Trac II."

Earle

In Andy's first reply to the original post, and at the later posted link it was explained that

"Quadra Drive is the latest system which uses the same transfer case as QuadraTrac II and adds limited slip/locking gerorotor differentials front and rear, and is quite a capable system."

I was not under the impression that either transfer case had a gerotor, like the link in Bill's post said. I was assuming that the Cherokee Full-time system, the Grand Cherokee Quadratrac II, and Quadra-Drive were all using the NVG242 transfer case.

Please correct me if I'm wrong!

-Andy W

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I don't think so either. Once you are locked up, the "gerotor" (not a real word) will sense no speed difference and unlock. On the other hand, most of the GC's target customers don't need a full locker effect. "Rubicon Grand Cherokee," no it just doesn't fit....

Earle

I did a web search for gerotor and came up with:

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