FmrLCpl wrote:- Transfer gear box (AWD): API 80w-90 GL5 hypoid gear oil; 0.9L (0.95 qts)
- Rear differential (AWD): API 80w-90 GL5 hypoid gear oil; 0.9L (0.95 qts)
I want to use synthetic gear oil for transfer gear box and rear differential.
But I could not find synthetic 80w-90.
Can I use synthetic gear oil 75w-90 instead? Any input?
Redline and Amsoil have 80w-90
2011 Sport SLS with nav Black Pearl Metallic