 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 23 2010, 04:21 AM
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#2
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Veteran Member  Group: Advanced Members Posts: 3,323 Joined: 30-March 06 From: Detroit Suburbs Member No.: 1,144 |
I'd do a 4th gen rear and avoid the wheel spacers. Wheel spacers = 2x the number of wheel studs to worry about keeping tight, and if you ever need to change the brakes its another part that needs unbolted. The wheel bearing is farther away from the wheel center which adds stress, and these shafts are know to spall. There is quality and some other design improvements in the later axles too.
Though they are aluminum the spacers will be heavier than the wider 4th gen rear. I'm calc'ing 1.67 lbs for the added tube and shaft length per side, versus 4-5 lbs per wheel spacer. |
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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 trackbird QUOTE 7.29.2 Both GM and Ford cars may also use a ... Sep 22 2010, 03:37 PM 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 |
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