 rear end and diff suggestions |
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 Sep 14 2010, 04:18 AM
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newbie Group: Members Posts: 24 Joined: 13-September 10 Member No.: 20,845  |
Hey all, new here. I'm looking for any and all helpful suggestions. Over the weekend, I broke my pinion on my borg warner in my 89 firebird LT1 running CMC2. I had been running a 3.45 gear but was considering going to a 10 bolt and a 3.90.
Any suggestions regarding the rear end and differential is appreciated. |
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Sep 22 2010, 03:37 PM
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FRRAX Owner/Admin  Group: Admin Posts: 15,437 Joined: 13-February 04 From: Ohio Member No.: 196 |
QUOTE 7.29.2 Both GM and Ford cars may also use a Ford 9”, GM 12 bolt, or Dana 44 rear axle housing, but the housing must maintain both the exact OEM suspension pickup points and OEM rear end geometry as the originally equipped axle assembly. Does changing the track width (if you don't swap wheels to 4th gen wheels or make any other changes) fit under keeping the same rear end geometry? I'm not picking a fight, I'm really asking for clarification. That rule could be read to allow the rear, or not. Typically I didn't think update/backdate crossed generations, so I didn't think that would allow it. Any thoughts? |
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Posts in this topic
wastntim rear end and diff suggestions Sep 14 2010, 04:18 AM
ReEntryRacer QUOTE (wastntim @ Sep 13 2010, 09:18 PM) ... Sep 16 2010, 05:42 AM
Sidney QUOTE (ReEntryRacer @ Sep 16 2010, 12:42 ... Sep 17 2010, 05:36 PM nape QUOTE (Sidney @ Sep 17 2010, 12:36 PM) Ro... Sep 22 2010, 01:50 AM nape 7.29.1 should allow the update/backdate across the... Sep 22 2010, 06:24 PM CMC #37 I know it is allowed to have 4th gen rears now in ... Sep 22 2010, 06:47 PM GlennCMC70 It is a legal swap.
The question was asked about ... Sep 22 2010, 11:24 PM StanIROCZ I'd do a 4th gen rear and avoid the wheel spac... Sep 23 2010, 04:21 AM |
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