is royal purple max-gear oil 75w-90 okay for the trany i lost my owners maunal.
it;s says okay for gl-4 gl-5

 

dunno, after reading on here about tranny fluids I chose BG synchroshift II.

 

No way .. I had royal purple in my tranny and was told to change it right away , use BG syncroshift.

 

thanks man

 

Im using Penzoil Synchromesh....its the heat so far.

 

Penzoil ??

 

Yeah.....its the same as the GM stuff and its rated for use in our trannies. Just wears out in about 5k miles as compared to BG. I dont want to spend 40 dollars a quart on tranny fluid.

 

5 speed or 6 speed?

 

The Penzoil seems to work well, although it is pretty thin. I used it for a while and didn't have any problems but got concerned about how thin it was. It is definitely not 75w-90. I switched to Amsoil 75w-90 synthetic GL-4 and have been happy so far. It does not have the lock-out problems the stock fluid had when cold and should provide more protection than the ultra thin Penzoil.

-Paul

 

penzoil syncromesh. All i'll use.

 

u cant go wrong with synchromesh.

 

i use bg syncroshift and the tranny became a little more soft when shifting