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#1 |
Registered User
Join Date: Dec 2012
Location: hillsdale mi
Posts: 46
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how long does my driveshaft have to be?
my 71 short bed has no drive shaft. what size drive shaft do i need to put back in it? it has a turbo 400 tranny
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#2 |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: how long does my driveshaft have to be?
It has to be 2.5" from the tailshaft to the center of the first ujoint then whatever distance to the center of the rear ujoint.
Its usually best to give the driveline shop a tailshaft to center of rear joint measurement. You have to measure your truck, theirs about a dozen motor mount combinations using stock parts so we can't really tell you how long your shaft needs to be. If you don't have a trans yoke it will probably cost you $250 for a new one piece shaft, quite a bit more if you want a 2 piecer. Posted via Mobile Device
__________________
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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#3 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,962
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Re: how long does my driveshaft have to be?
if you get a ds from a swb TH400 truck - it should work. If you are going to have a shop make it, gotta do what brad mentions for distance, but also not most places provide an online form with detailed directions on exaxctly what to measure. Also - make sure to measure with weight-on-wheels (if you measure it unsprung, the shop will make an artificially too long ds).
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#4 | |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: how long does my driveshaft have to be?
Quote:
The odds of another 67-72 with a th400 driveshaft fitting your truck are low enough to not bother looking. Like I said there's about a dozen locations to mount your engine. L6 mounts , sbc mounts, bbc mounts, and they can all be swapped from side to side. Who's to say what's been done to yours or the donor truck over the last 40 years. Posted via Mobile Device
__________________
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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#5 |
Registered User
Join Date: Dec 2012
Location: hillsdale mi
Posts: 46
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Re: how long does my driveshaft have to be?
does 60 inches sound about right? i measured from center hole to center hole
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#6 | |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
|
Re: how long does my driveshaft have to be?
Quote:
Posted via Mobile Device
__________________
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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