|
|
| Just looking to top up these fluids, and i don't know what i should add, can someone give me a pointer. TIA |
|
| |
|
Winkler, Manitoba Canada | 80W90 gear oil. |
|
| |
|
Somerville, Indiana | 50W synthetic will shift a lot easier in cold weather, and run cooler in hot weather for the transmission, but stay with something like 85W90 for the differential...They say the hypoid gears don't like 50W oil. |
|
| |
|
Eastern North Carolina | Some of those 5 speed Spicers called for 30wt motor oil....
|
|
| |
|
Washington, Kansas & Lincoln, Nebraska | Not sure on your rig, but my 2001 semi tractor came from the factory with synthetic 50 in the transmission and synthetic 75W-90 in the diffs.
Edited by Larry NCKS 8/20/2013 04:52
|
|
| |
|
Eastern Iowa | If they are are low this could be a good time to drain them both and start new. Not many used syn. Oil back in 1977 but you could use them now like mentioned it would be a plus for shifting in the transmission. 80w90 or 75w90 for rear end and 50w for the transmission. |
|
| |
|
Southern MN | I have a 1973 Chevy C-65 and found the service manuals online for the Spicer transmissions here: http://partsmanuals.org/spicer-service-manuals/
I bought 5 gallons of straight 50w engine oil off of Amazon for about $70 delivered to my door and use that.
A question I have is how hot should the transmission cases get while working? I can place my hand on the transmission case for about 5 seconds, then I need to pull it off. Is that too hot or normal?
Here is what the service manual specifies for oil:
 (Capture.JPG)
Attachments
----------------
 Capture.JPG (58KB - 106 downloads)
|
|
| |
|
South Central Kansas | 50w for trans and 80w90 for diff. you will be good to go. |
|
| |
|
Hagen Brothers farms,Goodrich ND | Super 65 - 8/21/2013 07:36
50w for trans and 80w90 for diff. you will be good to go.
And make sure the trans oil has a API GL 4 or lower rating and the rear ends MUST have an oil with an API GL 5 rating.
The trans does not like the EP additives of a GL5 oil, especially if it has brass or aluminum parts inside, but the rear end gears absolutly need the Exterme pressure additive package of a GL5 oil. |
|
| |
|
S.E. Sask. | Yes, I've read that EP gear oils are not recommended for many truck transmissions. I've been using straight grade #30 engine oil in the transmission of my IH Loadstar for years and it works fine. Rear end has 85-90 gear oil. |
|
| |
|
Wi | I do not know what the older trucks require, but if you have other trucks on the farm as well that are newer it may be nice to upgrade it to the oils they run if possible. I would check with multiple sources first to make sure the newer oils will be compatible. The reason I say multiple sources is due to the number of narrow minded people you will run into. Some will say you can't run that new junk in them, others will say its all the same, then in between you will find some who actually have some knowledge.
Synthetic SAE 50 is what all of the newer truck transmissions use along with synthetic 75W90 in the differentials. |
|
| |
What oil should i use for tranny and rear diff on 1977 GMC 6500?
