Re: Transmission Oil and OD Tran Oil weight

Posted by Tim Cole On 2013/6/28 17:59:23

Dear Dale

90w EP gear oil in the differential (GL-5) (85w-140 is fine)

140w non-EP in the trans - summer

90w non-EP in the trans - winter (if you drive it in the cold weather and snow alot)

If you have not drained the trans oil yet take a sample and compare it to modern gear oil. If it does not have a strong smell then it probably is not EP and you want to try 140w non-EP available from lubriplate. If the trans oil is nice and clean I would save it and reuse it to avoid a possible shifting problem. (you can always take it back out).