Quote:
Originally Posted by outlaw2
Changed mine yesterday at 1500 miles with RP 75w90. Couldn't believe all the metal dust on the magnetic drain plug, looked like a mushroom. Read on this site it is normal for break in, did the M-6 trans too...What an Improvement in get up and go and Smoothness..............Get er Done
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Don't put their Maxgear 75w90 in the trans; use their SynchroMax instead. I know it says it's for an auto trans but that's what GM requires for this transmission.