Transmissions and Drivetrain Need help with your trans? Problems with your axle?

How quick can you go on a 7 5/8" rear?

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Old May 6, 2005 | 03:25 PM
  #1  
Johnny Blaze's Avatar
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
How quick can you go on a 7 5/8" rear?

With aftermarket axles, and a supporting rear cover?
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Old May 6, 2005 | 03:29 PM
  #2  
RB83L69's Avatar
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
How many times? i.e., how many passes would you consider that if it lasted that long, it would be "enough"? One? Two? Ten? A season? Forever?
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Old May 6, 2005 | 03:42 PM
  #3  
Johnny Blaze's Avatar
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
In a street driven car that will see the track, maybe 4 or 5 times a year. With ET streets.
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Old May 6, 2005 | 03:52 PM
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TexasLT1's Avatar
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From: Angleton, TX
Car: '92 RS
could go on the first pass, could last indefinitely. the fact that you have an auto will help as you won't shock the driveline as much.
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Old May 7, 2005 | 01:15 AM
  #5  
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From: BENSALEM, PA
Car: 88 FORMULA / 88 IROC
Engine: 355 / 355
Transmission: T5 / TH400
Axle/Gears: 10 Bolt-3.73 / 9"-3.90
I have had a few customers go into the nines on the 7 5/8 diff. But they didnt last long..
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Old May 7, 2005 | 07:18 AM
  #6  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
I ran low 11's with one.
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Old May 7, 2005 | 07:37 AM
  #7  
88Camaro350's Avatar
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From: B'ville, WV
Car: 2002 Formula Firebird
Engine: LS1
Transmission: 4l60e
Axle/Gears: 3.23
Local guy here runs 11.11's in the 1/4 mile on a stock 10 bolt. He has a pretty built lt1 with a 125 shot of nitrous. He has raced it a couple seasons with 10'' slicks on the 10 bolts. He said he can't believe its still alive. He blew a head gasket on the stock lt1 block so now its getting a built 383...I have a feeling the 10 bolt will be dead before long.
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Old May 9, 2005 | 07:56 PM
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Guys running 11s are letting them live, while 13 second guys are breaking them. Stick shifts and sticky tires seem to spell "death" to these units. Ive seen some that lasted, but they always were in an auto equipped car.
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Old May 10, 2005 | 07:02 AM
  #9  
hairbear's Avatar
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Joined: Dec 2001
Posts: 42
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From: NC
Car: 1997 SS 30th Anniversary
I've chucked 3 rearends now out of my Automatic 97 SS. It's run a best of 7.67 in the 8th and usally 7.90's with drag radials. A strange 12 bolt now keeps the rear in place.
I think the times in the 1/4 mile would be like 11.90's-12.20's
So I highly doubt a 10 bolt will withstand anything faster than that for long
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