View Single Post
Old 01-26-2015, 08:21 PM   #9
Board Member
Join Date: Sep 2004
Location: SC
Default rear axle swap, 3.31 to 3.91

The local drag strip in Bradenton, FL has a pretty well organized test and tune on Thursdays, sometimes Fridays too. My dad and I started putting our work to the test, starting with a rear axle change from the 3.31 (had a 411 TruTrac differential in it, more on this later) over to a 3.91 rear axle.

The original owner gave us some of his time slips from his trips to the track, his best was 13.089 at 106 mph, so we tried to work up to that. He used an M46 with 3.91 gears when he was racing it


83' 242

Last edited by 242Fast; 04-25-2015 at 10:13 AM..
242Fast is offline   Reply With Quote