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Old 08-24-2007, 05:04 AM
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JayBar JayBar is offline
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Join Date: May 2003
Location: Jupiter/Tequesta, FL
Cobra Make, Engine: BDR#078,408 Dart Block, TKO 600,Indigo Blue, White Stripe
Posts: 315
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I have never noticed differential flex, but I have broken "the bolt". That was when I installed a 3.91 differential behind 436 RWHP on the track. The answer from Reg was to drill out the threads in the differential and install a grade 8 nut and bolt. Cost maybe $.075. And if you ever do brake the bolt it is a simple matter to replace it since there is no drilling out required because of the nut arrangement.
This fix has lasted me two years and many open track events and a few runs on the drag strip. When that modification was done I changed the ratio to 3.73 with three clutch packs. Lots of torque, with slicks to boot.

The brace looks great easy to install but I question its necessity in a BDR, when the bolt trick will work. Remember the E-36 BMW is a lot heaver.
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