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**asshanson** · 01-23-2007

I just had some new fluids put in the DSM (the rear diff, tranny, and xfer case). All the fluids are Castrol Syntec 75w90 (GL5), but now I hear that this could ruin the synchros in my tranny. Anyone have personal experience with this happening or can tell me for sure this is the wrong stuff to put in the transmission?

01-23-2007	#1
asshanson immune from paybans Join Date: Oct 2005 Location: West Des Moines Drives: poorly Posts: 4,358	Tranny fluid I just had some new fluids put in the DSM (the rear diff, tranny, and xfer case). All the fluids are Castrol Syntec 75w90 (GL5), but now I hear that this could ruin the synchros in my tranny. Anyone have personal experience with this happening or can tell me for sure this is the wrong stuff to put in the transmission?