4x4jeffyota

My uncle and I were talking today about our Toyotas and be told me something very interesting. He told me after he got his tranny rebuilt the mechanic told him to put SAE 30 motor oil in it instead of regular manual tranny grease. I looked at him kind of weird and he said "no kidding''. He said it's really good in very cold temps and very hot temps and you would never have to change it again. I dont know if I trust this. What do you guys think?

Elton

i want what he is smoking !

4x4jeffyota

me too haha

myyota

Matt16

Lets see, Toyota engineers spec's 90wt gear oil (IIRC), and some backyard mech tells you to run 30wt. Sure it shift great when its cold, but it wouldn't off the protection of heavier oil that your tranny needs. Buy Redline MT-90 if you're never going to change your gear oil again as at least it will last a long time and shift great during the meantime.

wyoming9

iTrader: (1)

if I remember there where some manual transmissions back in the eighties that called for ATF.

Me I run 85/140 gear oil since it doesn`t get real cold here.

I don`t know if SAE 30 motor oil would cling to the parts as well as gear oil

4x4jeffyota

yea I dont really trust the idea, some old school mechanics dont know any better haha

80banana

I've heard of people using 30 weight motor oil in the trans numerous times with good results, but personally, I'd stick with what Toyota recommends. Some of the newer Fords even run ATF in the manual transmissions, which is paradoxical, true.

4x4jeffyota

yea im just going to stick with what Toyota recommends too. Whats the best gear oil to run? I just got my truck back after 4 months and I want to change all the fluids in everything.

4Crawler

iTrader: (3)

Any good GL-4 gear oil in the transmission will work the best:
- http://www.4crawler.com/4x4/index.sh...ntheticGearOil

4x4jeffyota

thanks for that link, its has a lot of useful info