I've got a Rubicon with an NV1500 5 sp transmission. I need to change the lube. Pennzoil has some "Synchromesh Fluid" it states it's for Chrysler products. Part number 12345577. The question is, is this stuff any better than the dealer's stuff? Or, is there anything better than the Pennzoil? Any recommendations for the front and rear axles? These are limited slip differentials. Also, the service manual says to add 4 oz. of Limited Slip additive. Again, anybody have any recommendations aside from Chrysler? The service manual just doesn't have that much information.
Thanks
Lloyd Hanning