BADASS of New England

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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 4.10 gears

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96slowss



Posts : 855
Join date : 2010-06-09
Age : 28
Location : Halifax,MA

PostSubject: 4.10 gears   Sun Feb 19, 2012 3:30 pm

will i have issues with my new rearend with the 4.10 gears and my stock driveshaft??
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sdstick



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

PostSubject: Re: 4.10 gears   Sun Feb 19, 2012 3:33 pm

The common answer is 3.73's are the dividing line (some have vibes, some dont)
Anything after that requires a driveshaft.
Also depends on extended LCA's.
Thats just the USUAL answer tho....anything could happen.

_________________
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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
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Whine..eee...Silver LS6
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GasTT



Posts : 2675
Join date : 2009-01-19
Age : 28
Location : Treasure Coast, FL

PostSubject: Re: 4.10 gears   Sun Feb 19, 2012 3:37 pm

Time to buy a 3" aluminum drive shaft.
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Black death 13



Posts : 89
Join date : 2011-12-21
Age : 49
Location : Providence

PostSubject: 4.10 Rear end    Sun Feb 19, 2012 4:38 pm

I had 4:10 put in in my stock Caprice with LT-1 rearend and used the stock driveshaft and I have had no problems at all with it . Just my speed is looking crazy lol
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Pooge



Posts : 1699
Join date : 2009-03-24

PostSubject: Re: 4.10 gears   Sun Feb 19, 2012 7:56 pm

Black death 13 wrote:
I had 4:10 put in in my stock Caprice with LT-1 rearend and used the stock driveshaft and I have had no problems at all with it . Just my speed is looking crazy lol

I too had 4.11 gears with stock shaft and no trouble.

I plan to go aluminum on the 96 asap

Doug

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1996 Impala SS - 45K original miles - 5.3 LS swap - Brand new Bilsteins...WHAT A DIFFERENCE!
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toomanytoyz
Club President


Posts : 6871
Join date : 2009-01-20
Age : 40
Location : East Hampstead, NH USA

PostSubject: Re: 4.10 gears   Sun Feb 19, 2012 8:00 pm

Mine with the T56 didn't vibrate til about 80mph. But it's a harmonic thing with the steel driveshaft. You just can't avoid the physics... Wink

_________________
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96slowss



Posts : 855
Join date : 2010-06-09
Age : 28
Location : Halifax,MA

PostSubject: Re: 4.10 gears   Mon Feb 20, 2012 10:24 am

thanks i plan on getting a new driveshaft when the new motor goes in. but me new rearend should be in next week and i didnt know if i could do alittle "test driving" with my stock shaft for now..
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Machine-De-Zine



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

PostSubject: Re: 4.10 gears   Mon Feb 20, 2012 11:54 am

toomanytoyz wrote:
Mine with the T56 didn't vibrate til about 80mph. But it's a harmonic thing with the steel driveshaft. You just can't avoid the physics... Wink
Yes, thats why a drive-shaft loop is such a great idea!
Calculate your driveshaft speed by tire diameter & wheel RPMs, rear gear ratio and the maximum expected vehicle speed.
Then, measure your driveshaft length and refer to this chart below:
http://www.markwilliams.com/driveshafttech.aspx -
http://www.markwilliams.com/servicebull/sb0049.pdf
http://www.markwilliams.com/driveshafts.aspx -

Here's an interesting calculator page:
http://www.roversd1.nl/sd1web/wheelcalc.html -
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