The car is a '92 Rodeo 3.1 V6 5 speed manual w/ 4wd. I've been told to
use engine oil by my haynes manual, dexron 2 by isuzu customer service,
and gear oil by pep boys. Someone put gear oil in it before and when it
drives in gear it whines alot. The manual says it might be a Borg
Warner trans but I am not sure. What do you guys think?

 

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You will need to use engine oil. 5W-30 is the recommended oil.


If you are having synchro problems, I would suggest using MTL from Redline. That will help out alot.

 

Hi, ok, I went ahead and installed 10W40. Like I stated earlier, the trans whines when the RPMS goes up and you said that this MTL will help quiet that? What is MTL and can it or something similar be bought at a local car parts store? Thanks,
Adam