I have a 2000 Jeep Grand Cherokee, and my son has a 1997 JGC. We are doing some lube changes for his car (which he just acquired), and we are comparing some of the specifications in both of the Jeep manuals. We have come up with some basic questions.
- The 1997 book says for the *transmission oil*, it should be ATF+2 or ATF+2 7176. The 2000 book says it should be ATF+3 or ATF+3 7176.
QUESTION-- is the ATF+3 just the updated spec for ATF+2 ? If so, I should use ATF+3 in the 1997 like in the 2000 model ?
- For the *transfer case* oil, both books say to use :
"automatic transmission fluid or equivalent, labeled Dextron III"
QUESTION-- is it literally true that the transfer case uses regular transmission fluid ? IF SO, then why doesn't the book say use ATF+3, which is the spec given for the transmission fluid ? Perhaps ATF+3 is the same as Dextron III ??
- For the *differentials*, the book says to use SAE 80w-90 gear lube in the front axle, and SAE 75w-140 synthetic in the rear axle. They say IF the car has Trac-Loc, to use a friction modifier in the rear axle.
QUESTION-- How can we know if this used vehicle has Trac-Loc ? (The transmission type is Quadra-trac) We see no markings or other indication if this vehicle had that option (Trac-Loc) and we don't have the original invoice so we don't know how we would know. I don't know how much difference it would make. I do have the friction modifier on hand as I used it in my 2000, but I don't know if I should add it.
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We will appreciate any comments and advice on these questions !!
Thank You very much !!
--James---