Fluids - Front/Rear Diff's, Transfer Case - 75W-90
#1
Registered User
Thread Starter
Fluids - Front/Rear Diff's, Transfer Case - 75W-90
Looks like I can use synthetic 75W-90 GL-5 rated fluid in both my front and rear diff's and in my 5 speed manual transmission, is this correct?
Also, how difficult is it to change the manual transmission fluid?
Looking at changing all fluids this weekend in my 4x4.
Also, how difficult is it to change the manual transmission fluid?
Looking at changing all fluids this weekend in my 4x4.
#2
Registered User
There are a lot of existing threads on this, searching "75W-90 GL-4" will get you a lot of results, including this thread: https://www.yotatech.com/forums/f116...ar-oil-266968/ which looks pretty complete.
Short answer:
Yes you CAN use GL-5 in the transmission, but most folks say GL-4 will give you much smoother shifting because it allows the synchros to work better. Redline MT90 is the most highly recommended. It's synthetic, and I don't know of any 75W-90 that comes in conventional / dino variety. Sta-lube from NAPA is close, but is 80W-90 or something like that, so it wouldn't be recommended if you ever got near freezing temps.
Short answer:
Yes you CAN use GL-5 in the transmission, but most folks say GL-4 will give you much smoother shifting because it allows the synchros to work better. Redline MT90 is the most highly recommended. It's synthetic, and I don't know of any 75W-90 that comes in conventional / dino variety. Sta-lube from NAPA is close, but is 80W-90 or something like that, so it wouldn't be recommended if you ever got near freezing temps.
#3
Registered User
Thread Starter
Thanks! GL-5 has to be used in in the diff's right? Also I can use the 75w-90 in my transfer case, is this correct as well?
Where I live its is below freezing most of the winter. It's usually mid teens at night Dec-Jan.
Where I live its is below freezing most of the winter. It's usually mid teens at night Dec-Jan.
#4
Registered User
I use Mobil 1 75-90 synthetic in the diffs and transfer case. I find the transmissions in these trucks are picky and since I haven't been in a spot to be able to spring for the redline MT90, the Sta-Lube GL4 85-90 is my next choice.
During cold mornings, sometimes it is slightly harder to shift, but I remedy that by warming up the transmission as the engine is warming up. Simply put the transfer case in neutral and shift the transmission to 1st.
Here's a pictyre of what I yse in my transmission.
During cold mornings, sometimes it is slightly harder to shift, but I remedy that by warming up the transmission as the engine is warming up. Simply put the transfer case in neutral and shift the transmission to 1st.
Here's a pictyre of what I yse in my transmission.
#5
Contributing Member
iTrader: (3)
- http://www.4crawler.com/4x4/index.sh...ntheticGearOil
T-case and transmission can use either GL-4 or GL-5. As noted above, GL-4 works better in the transmission due to the synchros. T-case makes no difference.
#7
Registered User
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