98 C3500 Rear

[RHUBB]

Does anyone know the proper oil for the rear differential of a 98 C3500 2 wheel drive truck

 

[Twisted Steel Performance]

75w90 or 75w140

 

[Husker6.5]

And if it's posi, make sure the lube either has the special additive in it, or if plain, to add the additive to the differential on change. Also, go with synthetic fluid if at all ppossible.

 

[THEFERMANATOR]

And if it's posi, make sure the lube either has the special additive in it, or if plain, to add the additive to the differential on change. Also, go with synthetic fluid if at all ppossible.

The GM G80 gov-lok does not require the additive.