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An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 WTB Driveshaft

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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: WTB Driveshaft   Wed Dec 29, 2010 2:55 pm

Guys, how much does a good condition DS go for?
I have a FLA one I need to offer on.
Thanks for your help

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
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toomanytoyz
Club President


Posts : 6870
Join date : 2009-01-20
Age : 40
Location : East Hampstead, NH USA

PostSubject: Re: WTB Driveshaft   Thu Dec 30, 2010 8:47 am

Start low. Wink

I'd let one go for 25 bucks for a stock shaft.

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Bill "The Verb" Crovo - Resident Car Slut & Unicorn Hunter

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Missing all my previous B's, D's and V... Sad
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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: WTB Driveshaft   Thu Dec 30, 2010 11:07 am

Any idea what the difference is between 9C1 & impalas
4 different DS #'s 7841077, 7841078, 7842127 (9C1) & 26047193 (wx3)

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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Machine-De-Zine



Posts : 512
Join date : 2010-11-16
Age : 60
Location : Wrentham

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 4:27 am

sdstick wrote:
Any idea what the difference is between 9C1 & impalas
4 different DS #'s 7841077, 7841078, 7842127 (9C1) & 26047193 (wx3)

I believe the two most important things to consider when specifying a driveshaft is the length and it's critical speed. The longer the distance from trans tail to pinion yoke, the larger diameter and the higher the shaft RPM, the larger the shaft diameter. The thickness of the tube's wall also effects it's resistance to "whip". Also the material, such as a comparison between aluminum and steel or carbon fiber. Strength must also be considered, especially if high horse power is delivered through it.

I am pretty sure General Motors computer selects each driveshaft based on all parameters. Just because a shaft fits into your car does NOT make it automatically correct. For example, years ago my friend and I both had the same 1969/70 Chevrolet K-20 long bed pick up trucks with 4bbl 350 & manual transmission. The only difference between our trucks was the color of paint and gear ratios. His was factory equipped with 3.73:1 while mine was optioned with special ordered 4.88:1 gears. At 65 MPH in fourth gear, my drive shaft would be spinning significantly faster than his. His one piece drive shaft was interchangeable with mine for fitment but his was approximately 3.5" in diameter and mine had a factory installed 6.0" diameter D/S.

Those different part numbers you listed are very likely specific shafts "assembly line selected" for use in slightly different factory configurations with respect to whether it was a (civilian 7.6") vs (9C1/SS 8.6") axle assembly, or L99 vs LT1 engine, or different gear ratio choices. Check this out,,, http://www.markwilliams.com/driveshafttech.aspx .

I noticed in the GM Heritage Center Vehicle Specification PDFs, the exact drive shaft dimensions were specified for these very same vehicle configurations. I hope this info is helpful.

.
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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 9:11 am

Thanks for the reply. How do you use that GM heritage center to extract info?
I searched & did get some info
Didnt search on DS p/n. Didnt think it would be that easy.
I guess I'm wondering what the DS differences between a 95-96 9C1 & Impala would be. Same length, same power, if GM has different shafts there MUST be a difference

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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No Moa



Posts : 3870
Join date : 2009-02-21
Age : 44
Location : Midcoast Maine

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 9:45 am

Somewhere on issf is a driveshaft comparison. I couldn't find it, but It was there, I think navylifter wrote it
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http://www.collectorfbody.com
Machine-De-Zine



Posts : 512
Join date : 2010-11-16
Age : 60
Location : Wrentham

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 9:50 am

sdstick wrote:
Thanks for the reply. How do you use that GM heritage center to extract info?
I searched & did get some info
Didnt search on DS p/n. Didnt think it would be that easy.
I guess I'm wondering what the DS differences between a 95-96 9C1 & Impala would be. Same length, same power, if GM has different shafts there MUST be a difference

Do you know exactly which specific cars each (or any) of those driveshafts or part numbers came from?

Try this. http://www.gmheritagecenter.com/gm-heritage-archive/docs/Caprice/1996-Chevrolet-Caprice.pdf .

Page 10A (rear wheel drive) AAMA96 Propeller-Shaft 5.7 Liter. No part numbers listed here though, just dimensions.

.
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sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 10:41 am

Those P/N's came from GM's B-Body manual
It tells which, I just ASSUMED 9C1 or WX3 would be the only possibilities
Thanks for the link, I'll explore it when I can sit a while

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
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boojum



Posts : 2152
Join date : 2009-01-21
Age : 29
Location : NH

PostSubject: Re: WTB Driveshaft   Fri Dec 31, 2010 11:21 am

From Navy Lifer that other forum:
http://www.impalassforum.com/vBulletin/showthread.php?t=242371

"7841077 - for 7.625" axle

The other 3 driveshafts were fitted to cars with the 8.5" rear axle.

7841078 - sedan and wagon - .065" wall thickness tube (code BM on AAM label)

7842127 - used only on 94-96 9C1 Caprice - code & wall thickness - anyone?

26047193 - used only on 94-96 WX3 Impala SS & 95-96 WX8 Caprice SS - .088" wall thickness tube (code BB on AAM label)

It still remains unclear what reasons determined the 2 different shafts for 9C1 and WX3. Gear ratios were the same (with LT1), and the only difference that would need to be addressed was the speed rating of the 9C1 tires, which, depending on the option selected, could be a V-rated tire, which theoretically would allow a cop car to run as fast as a stock Impala SS--in the 140 - 145 mph range, give or take. Not sure if 9C1 PCM's were tuned to limit speed, regardless of tire choice, however."
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PostSubject: Re: WTB Driveshaft   Today at 4:34 am

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