Front and rear diff fluid

[Don mercier]

My sealed bearings are in and im wondering if i could use shock oil in the differential cups? , ive got 90/1130cst,

 

[thegunsmith]

My sealed bearings are in and im wondering if i could use shock oil in the differential cups? , ive got 90/1130cst,

I was told the stock weight is 10k cst, so I think what you have will be too thin

 

[Don mercier]

I was told the stock weight is 10k cst, so I think what you have will be too thin

The arrma site says 7000, ive got some marine gear oil 75w80 im assuming ill just have too top them up a bit but would like too know before doing it