The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-04-2011, 03:54 PM   #1
jlelec
Registered User
 
Join Date: Oct 2009
Location: Waynesboro, GA
Posts: 70
Does anyone know?

I am restoring a 1974 1/2 Cheyenne Super with factory 454 (short bed). The truck had the wrong transmission when I got it, I found the correct 400 transmission from another 74 crew cab. Does anyone know if this truck was supposed to have a 2 piece drive shaft? Looks like it had a place a hanger bearing?? If so anyone know where I might find one??
jlelec is offline   Reply With Quote
Old 07-04-2011, 04:29 PM   #2
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,229
Re: Does anyone know?

Yes - 454 short box came with the two piece driveshaft.

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is offline   Reply With Quote
Old 07-04-2011, 05:48 PM   #3
jlelec
Registered User
 
Join Date: Oct 2009
Location: Waynesboro, GA
Posts: 70
Re: Does anyone know?

Thanks! Does anyone know what places sell them??

Last edited by old Rusty C10; 07-05-2011 at 09:12 AM.
jlelec is offline   Reply With Quote
Old 07-05-2011, 12:18 AM   #4
MadManAndrew
Registered User
 
Join Date: Mar 2011
Location: Dallas, Texas
Posts: 920
Re: Does anyone know?

Junk yard's probably your best bet...
__________________
1955 Chevy 3600 http://67-72chevytrucks.com/vboard/s...61#post8589061
MadManAndrew is offline   Reply With Quote
Old 07-05-2011, 04:40 AM   #5
INSIDIOUS '86
Registered User
 
INSIDIOUS '86's Avatar
 
Join Date: Jul 2009
Location: washington
Posts: 4,178
Re: Does anyone know?

why two piece?
__________________
377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac
3''spintech prostreet mufflers xpipe 1 3/4 headers
build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217
Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511
INSIDIOUS '86 is offline   Reply With Quote
Old 07-05-2011, 08:28 AM   #6
MalibuSSwagon
Registered User
 
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
Re: Does anyone know?

Quote:
Originally Posted by INSIDIOUS '86 View Post
why two piece?
I believe it had something to do with the transmission ordered. HD trans gets 2 pc driveshaft, I say this because my shortbed with the SM465 has the 2 pc driveshaft
MalibuSSwagon is offline   Reply With Quote
Old 07-05-2011, 09:29 AM   #7
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,229
Re: Does anyone know?

Quote:
Originally Posted by INSIDIOUS '86 View Post
why two piece?
It has to do with keeping the driveline below it's "critical speed" (the point at which the driveshaft starts whipping like a jump rope). Critical speed is determined by driveline length, rear axle rpm and anticipated top speed.

Apparently this particular combination met the requirements for a two piece shaft.

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is offline   Reply With Quote
Old 07-05-2011, 12:09 PM   #8
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,229
Re: Does anyone know?

Quote:
Originally Posted by Keith Seymore View Post
It has to do with keeping the driveline below it's "critical speed" (the point at which the driveshaft starts whipping like a jump rope). Critical speed is determined by driveline length, rear axle rpm and anticipated top speed.

Apparently this particular combination met the requirements for a two piece shaft.

K
Edit - should have said "rear axle ratio" (which translates into driveline rpm).

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is offline   Reply With Quote
Old 07-05-2011, 12:19 PM   #9
J Knight
Registered User
 
J Knight's Avatar
 
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
Re: Does anyone know?

I can also verify for you that they did have 2 drive shafts on factory swb bb trucks.
Back in 92 I had a completely original 77gmc bb truck with 2 drive shafts.
Posted via Mobile Device
__________________
John
82 Chevy Silverado 350ci/TH350
J Knight is offline   Reply With Quote
Old 07-05-2011, 01:01 PM   #10
73gmc454
Registered User
 
73gmc454's Avatar
 
Join Date: Dec 2010
Location: louisville ohio
Posts: 375
Re: Does anyone know?

The reason for the 2 piece is because all the truck 400's has a hd bolt in yoke instead of a slip yoke like the 350's , the 2 piece has a slip joint behind the carrier bearing , I'm going to do away with the 2 pc and install a slip yoke on the trans,
__________________
my build 77 gmc shortbed big block, http://67-72chevytrucks.com/vboard/s...d.php?t=438237
73gmc454 is offline   Reply With Quote
Old 07-05-2011, 09:11 AM   #11
old Rusty C10
Robert Olson Transport
 
old Rusty C10's Avatar
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,313
Re: Does anyone know?

you may want to PM member James MC Clure he had a source for driveshafts..
__________________
Bob



1951 International running on a squarebody chassis


"If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board"
http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!)


PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport

Live each day to the fullest.. you never know when fate is going to pull the rug out from under you...
I hate cancer!!
old Rusty C10 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:16 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com