My truck calls for 80W-90 in the front and back. Can I run synthetic or would that have a negative effect on the limited slip?

 

I didnt run Synthetic in mine. it feels fine. but again, thats what i did. Changed mine, mid last year.

edit, forgot about the new axle i put on after the wreck, um back in july.

 

i run Lucas in both front and rear. no issues here. also with the Lucas you don't need to run an additive for the LS, same with amsoil.

http://www.lucasoil.com/

 

i just got my tranny serviced and new clutch , and when i ask about fluid,, they said ATF and even wrote it on trannny for mechanicmm on tranny and on gear box,.

said the components inside are aluminium and neeed thinner fluid than gear oil.

just my 2 cents, and i hope it was right,,lol