# for the specific Royal Purple synchromax
Cool, let us know please :thumbsup:redstaf426 said:Has anyone tried B&M synthetic trick shift automatic transmission fluid??It says on the back label it may be used for Manual transmission that requires automatic transmission fluid.I bought 4 quarts,trying it out tomorrow.
Mike_Hawk said:Cool, let us know please :thumbsup:
I don't know if it will make any difference by itself. The main thing it does is quiet down the gear noise from the aftermarket shifter installed at fluid change. But it wouldn't hurt.TrueBlueGT said:has anyone used the stock fluid with a friction modifier added? I am going to change mine this coming week while it is on the lift for the solid axle swap.
Not at all. The GM is what is actually the main one said to use. But the RB is full synthetic that people have tried and found to work as good or better. Either is better than the factory.Wings65288 said:will it hurt anything by going with the GM syncromesh over RP syncromax?