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There are several different things being talked about here and hard to keep up.
ATF+3 was discontinued in 05 and replaced with +4. If you have some old fluid still to use in an older than 05 vehicle, you'll be fine in both and auto tranny and tcase. The main difference between the +3 and +4 is the +4 went to using group 3 basestocks(synthetic??) as opposed to mineral based. Dexron is GM's rating on fluids and really shouldn't matter for this discussion. The NV4500 does need a GL-4, not GL-5 rated 75/90 gear lube. |
Originally Posted by 1AMatt
(Post 643710)
Thank you. That is very good info for me because when I get mine done. I was always under the impression that it was supposed to be GL-5. I'm guessing synthetic will probably be the way to go correct?
For the most part. Synthetics control heat better.(usually) That and the last time I priced it, The Amsoil synthetic fluid was cheaper than the Mopar fluid by a good margin. IIRC The Mopar fluid is The Castrol Syntorque anyways. |
I went ahead and bought some amsoil just because it was cheaper. Whats the point of buying fluid that is higher and its pretty much the same thing
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Some transmissions shift different with different fluid. My nv5600 actually shifted worse with the amsoil fluid than it did with the mopar fluid.
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