Guest Pegasus76 Posted December 3, 2002 Share Posted December 3, 2002 Through the help of fellow Z brethren (thanks guys) I have established that I have 390 gears in the rear end...I'm gonna swap back in the stock gears but was wondering if it would be a direct connect in or if I had to swap out anything else like the rings or somethin... Quote Link to comment Share on other sites More sharing options...
Mike C Posted December 4, 2002 Share Posted December 4, 2002 This would be more appropriate in the Drivetrain section...but, for a Rookie working with differentials, your best bet is to buy a complete diff with 3.54 gears and just swap it in place of your 3.90 diff. This is probably the cheapest way to go, also. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted December 4, 2002 Share Posted December 4, 2002 Mike is correct. The carrier has a stamped letter that must be used in conjuction with the same lettered casing I believe. When the two become different, the the shims will most likely be different too. To be safe, a complete swapping of the whole differential is the safest way to go. Those shims are very expensive from the dealer. Quote Link to comment Share on other sites More sharing options...
Guest Pegasus76 Posted December 4, 2002 Share Posted December 4, 2002 Thanks a bunch guys! appreciate it Quote Link to comment Share on other sites More sharing options...
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