Mike, I know you have an 86 CJ, T-5, and I know you have researched this issue. I have been going back and forth about which fluid to put in mine, and finally ordered a few quarts of Redline MT. I recently noticed in my Haynes manual that the suggested fluid for the T-5 is "Jeep Manual Transmission Lubricant (part No. 4874464)." I did a search on 4874464 and came up with this Penzoil product
Thanks!
Thanks for the response, Mike. Well, I just put the MT90 in -- syntehtic
75w 90 "real" gl4. The fellow who had the Jeep before me said that the tranny was recently rebuilt, so I am hoping the seals hold up to the synthetic. The stuff I drained out was clearly gear oil, but sisnce I had no way of knowing what it was, I felt I had to change the fluid.
Make sure it is made for transmissions, not differentials. I had a bugger of a time finding any that didn't already have the limited slip additive.
I ended up using a semi synthetic mainly because that is all I could find that day AND I just put all new seals in the tranny. I certainly would not have used a synthetic with the old seals.
My book also says you can use a GL5 for topping up, but to use the GL4 for a change.
The first fluid I put in was a 'GL4 and GL5' compatible. This lasted a couple months and I couldn't shift anymore. The syncros wouldn't spin up right.
Mike
Sleestak wrote:
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