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I want to change all the gear oil in my PW, what brand and WT do you recommend for the differentials 4spd trans and transfer case?

I use Royal Purple in all my stuff, but it's overkill. Any name brand lube will work, just be sure you don't use a GL-5 rated lube in the transmission; if it gets over 300 degrees F, it will eat the synchros and in any case reduces the effectiveness of the synchros making shifts harder and slower.

elacruze wrote:I use Royal Purple in all my stuff, but it's overkill. Any name brand lube will work, just be sure you don't use a GL-5 rated lube in the transmission; if it gets over 300 degrees F, it will eat the synchros and in any case reduces the effectiveness of the synchros making shifts harder and slower.

What would be best in a NP540 5-speed?

Thanks,

Bucky

hemihydro135 wrote:I want to change all the gear oil in my PW, what brand and WT do you recommend for the differentials 4spd trans and transfer case?

Do you have a Factory Service Manual?
John