M1028 Differential Lubrication

[Zero_cool]

Sorry I know this has been asked before but i cant remember where i saw it...
1987 M1028 I cant remember what kind of Diffy lube im suppose to use.
I bought Valvoline SYN power Full synthetic SAE 75W-90 and a tube of trans-X additive
Is this the right stuff to put in the Front Diff?
How much of each am I spose to put in?
Thanks

 

[scrambled]

I have never used the trans-x. GM sells a little black bottle of posi fluid that works great. If you can find the dana spicer green fluid, it is the best. We used DS to help trac locks that were getting loose. It seemed to coat the clutches and help them grip noticeably better.

 

[Zero_cool]

thanks buddy. Im assuming since you didn't correct me that 75W-90 is ok to run?
I've never messed with differentials before.

 

[scrambled]

the D60 cap is 3 quarts. How much does the trans-x say to use per quart?

 

[Zero_cool]

My question is if 75W-90 is the proper weight gear oil to use in the M1028 front axel.
I put 2 quarts of 75W-90 and 4 ounces of tans-x additive

 

[scrambled]

75-90 is fine.