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06-28-2013, 01:51 PM
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#1 |
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Registered User
Join Date: Jul 2012
Location: Ohio
Posts: 47
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Driveshaft shortening
I'm doing TH 350 to 700r4 swap on my 1972 C 10. Can someone tell me how much the driveshaft has to be shortened or if there is a stock replacement? Thanks
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06-28-2013, 02:23 PM
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#2 |
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Registered User
Join Date: Feb 2012
Location: Ventura,Ca
Posts: 745
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Re: Driveshaft shortening
1 piece or 2 piece shaft?
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'67 C20 LBW |
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06-28-2013, 02:29 PM
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#3 |
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the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: Driveshaft shortening
Measure your truck!
There's so many different ways to put an engine in these trucks that its mind bending. 6cyl mounts, v8 mounts, big block mounts, swap pass to drivers side mounts and a couple of different places on the frame to bolt them in. Take your old shaft to a driveline shop (both pieces if its a 2 piece driveshaft) with a tailshaft to center of rear joint measurement (tailshaft to center of carrier bearing for 2 piece) have them shorten and ballance your shaft. Its pretty cheap and you will have a shaft that you can actually use when you are done. If your old shaft was the correct length to start out with and you don't move anything else around it should need to be 2.5" shorter I believe. Posted via Mobile Device
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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06-28-2013, 03:45 PM
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#4 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Driveshaft shortening
to have the driveshaft done once and only pay for that service once it wood make sence to measure it yourself a few times so it is dunn right
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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06-28-2013, 03:50 PM
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#5 |
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Junior Member
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
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Re: Driveshaft shortening
I would suggest taking the truck with you so there is no margin for error.
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71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 |
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06-28-2013, 04:12 PM
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#6 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: Driveshaft shortening
I was looking for the Crisco!
 Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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06-28-2013, 06:20 PM
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#7 |
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Registered User
 
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Driveshaft shortening
a 700r4 is 3 1/8 inch longer than a short turbo 350
turbo 350s were made in 3 differing lengths |
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06-28-2013, 10:50 PM
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#8 |
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Registered User
Join Date: Jun 2009
Location: Arlington Texas
Posts: 602
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Re: Driveshaft shortening
I had mine cut at 2 1/2 inches but the only way to know for sure is to measure it yourself.
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1970 GMC truck  1988 Harley 1200 Sportster 
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06-29-2013, 07:50 AM
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#9 |
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Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: Driveshaft shortening
A driveshaft from a 6 cylinder truck works with your motor in the forward location.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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06-29-2013, 09:16 AM
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#10 | |
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Registered User
Join Date: Jul 2012
Location: Ohio
Posts: 47
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Re: Driveshaft shortening
Quote:
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