 '91 Formula 3rd gen project |
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 Oct 18 2007, 11:40 PM
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#21
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Experienced Member  Group: Advanced Members Posts: 2,289 Joined: 4-May 04 From: Kenvil, NJ Member No.: 331  |
Whats wrong with 9-bolts, except for the fact that you can't get a decent diff for it? I love the fact that it doesn't use c-clips.
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Oct 19 2007, 12:01 AM
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#22
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Mullet club chairman Group: Advanced Members Posts: 786 Joined: 25-March 06 From: South Bend IN Member No.: 1,135 |
QUOTE (CrashTestDummy @ Oct 18 2007, 04:47 PM)  It'll probably hold up just nice with slicks. You'll just get very good at repacking the clutches. Well I hope I don't have to repack clutches, (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif) my Zexel Torsen diff is a torque biasing diff with gears in stead of clutches. Either way, I'm afraid with slicks I'll still be spinning the inside tire, I can sometimes spin one wheel now.... The fact is, I don't have $3000 to spend on a rear axle right now so the good 'ol 7.5 is just gonna have to work for now. |
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Oct 19 2007, 12:10 AM
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#23
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CMCer Group: Moderators Posts: 2,932 Joined: 12-February 04 From: the sticks near VIR Member No.: 194 |
QUOTE (slowTA @ Oct 18 2007, 06:40 PM) Whats wrong with 9-bolts, except for the fact that you can't get a decent diff for it? I love the fact that it doesn't use c-clips. I think you answered your own question! (IMG:http://www.frrax.com/rrforum/style_emoticons/default/wink.gif) I did own a 9bolt equipped car, an '89 Formula 350 (bought new). No complaints! |
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Oct 19 2007, 12:13 AM
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#24
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Veteran Member Group: Advanced Members Posts: 3,874 Joined: 3-July 04 From: Pearland, Texas Member No.: 385 |
There's absolutely nothing wrong with a 9-bolt. It has served us very well. They are lightweight and strong. We have a 3.73 in ours. Trouble is getting parts. I think we have completely worn ours out. I'd rebuild it if I could get parts.
Yeah, by contemporary standards, it's an antique. But that's not a big deal for someone who keeps a '68 Cadillac running. ;-) |
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Nov 30 2008, 07:22 PM
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#25
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CMCer Group: Moderators Posts: 2,932 Joined: 12-February 04 From: the sticks near VIR Member No.: 194 |
Project update - just about to get on the lift at Blaine Fab. Since then I made a couple decisions - decided LS1 brakes are fine for a mostly street app., going with an EB Miller kit and what is left from my LS1 brake set-up from my 4th gen CMC car. Late *braking* (ha!) news, I was able to obtain my old 3rd gen CMC car's rear end, a nice GM parts Dana 44 with a Detroit Locker. Hasn't been touched since I last raced it! A hearty thank you to my past and present CMC cars for their contributions!
Can't wait to drive this sucker! I'm gonna see how long I can lay down rubber marks on my neighbor's driveway (don't worry, we around here consider that a right of passage. Pretty kewl 'hood!). (IMG:http://www.frrax.com/rrforum/style_emoticons/default/dancenana.gif) (IMG:http://www.frrax.com/rrforum/style_emoticons/default/gr_driving3.gif)
Reason for edit: forgot several things, as usual!
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Oct 7 2009, 09:58 PM
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#26
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Advanced Member Group: Advanced Members Posts: 560 Joined: 20-January 09 From: Wichita, KS Member No.: 3,727 |
QUOTE (CrashTestDummy @ Oct 18 2007, 07:13 PM) There's absolutely nothing wrong with a 9-bolt. It has served us very well. They are lightweight and strong. We have a 3.73 in ours. Trouble is getting parts. I think we have completely worn ours out. I'd rebuild it if I could get parts. Yeah, by contemporary standards, it's an antique. But that's not a big deal for someone who keeps a '68 Cadillac running. ;-) I could give you a OD and ID on the shims needed to shim out the posi cones. When they get tired the cones sit lower and lower in the carrier until you've got less gear mesh on the spider gears and less preload, not a good combination. The cones may require machining to keep the faces from bottoming out on the outside of the carrier if they're pretty worn. Pretty easy to go through after you've done it a few times. I need to go through my spare, I've got a line on a fourth one with pbr's but I know I'll have to go to something stronger eventually. I'd like to play around with using a beefier spring on them to get some more preload out of it, I threw a washer under the springs, but I'm not sure how much that helped. QUOTE (CMC #37 @ Nov 30 2008, 02:22 PM) Project update - just about to get on the lift at Blaine Fab. Since then I made a couple decisions - decided LS1 brakes are fine for a mostly street app., going with an EB Miller kit and what is left from my LS1 brake set-up from my 4th gen CMC car. Late *braking* (ha!) news, I was able to obtain my old 3rd gen CMC car's rear end, a nice GM parts Dana 44 with a Detroit Locker. Hasn't been touched since I last raced it! A hearty thank you to my past and present CMC cars for their contributions! Can't wait to drive this sucker! I'm gonna see how long I can lay down rubber marks on my neighbor's driveway (don't worry, we around here consider that a right of passage. Pretty kewl 'hood!). (IMG:http://www.frrax.com/rrforum/style_emoticons/default/dancenana.gif) (IMG:http://www.frrax.com/rrforum/style_emoticons/default/gr_driving3.gif) Congrats on finding a dana 44! This post has been edited by roostmeyer: Oct 7 2009, 10:00 PM |
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Oct 7 2009, 10:22 PM
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#27
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Experienced Member Group: Advanced Members Posts: 2,289 Joined: 4-May 04 From: Kenvil, NJ Member No.: 331 |
I'm interested in more 9 bolt diff info.
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