The previous owner of my 82 pickup did not maintain it at all. I am trying to fix all that he has trashed, so far I have replaced most of the ignition, changed the oil (W/ filter), replaced the air filter, and flushed the coolant. Now I want to change the oil in the manual tranny and differential. My question is, can (and should) i use a synthetic gear lube in this application? What type/grade/etc.? How would I add it after i drained it? Thanks in advance. Chas
Manual Transmission and Differential Oil
Jul 21, 2007
7 Replies
Recommend you stick with EXACTLY what Toyota recommends. Oil that's too light or too heavy will cause problems. That's prolly going to be 75-90 in both gearboxes and 80-90 in the diffs.
Okay, I read in the manual toyota reccomends either 80W-90 or 75W- something for the transmission and 80W-90 for the differential. Can i run synthetic? What are the (dis)advantages to running synthetics? Thanks, Chas
Really doesn't make any difference, use whever's cheapest. Stick with 75w-90 in the gearboxes for easier shifting.
When I switched to synthetic gear lube (same weight as stock) in my transmission, my wintertime shifting became a lot easier. Larry
Okay, so go with 75W-90 in the gearbox and 80W-90 in the differential. Can I change to synthetic without any problems?
I have been happy with Redline synthetic products. They are available at Summit racing. Redline has a website that will help you decide what to use, or will mail you product info. Don't know about your 82, but most of my trannys allowed me to pour the lube in when I removed the shifter. Good luck. Ed
Chas, there is no problem of going to synthetic, once you have gone to synth you have to always use the synthetic in the future.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required