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11-23-2012, 12:59 AM
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#1 |
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Registered User
Join Date: Nov 2009
Location: Quinlan, Texas
Posts: 18
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1972 Big Block SWB ... Driveshaft Question... Need a little help...
1972 Big Block SWB ... Driveshaft Question... Need a little help...
-------------------------------------------------------------------------------- I am building a 1972 SWB Big Block truck with a Turbo 400 Transmission & I have an Original Big Block Cab for it.... The frame is from a 1972 SWB Small Block, Automatic Transmission truck...... My question is this.... Did the 1972 Short Bed Big Block Trucks have two piece drive shafts or a One piece? My Frame I am using has the carrier bearing bracket to support the carrier bearing of a two piece driveshaft.... Which I was thinking of removing the bracket.... Unless the BB Short bed trucks had two piece driveshafts as well & I will go that route.... I have another 69-70 Short bed frame that does NOT have the carrier bearing bracket but that frame was an original Small Block, standard shift truck.... therefore... I am curious how they were from the factory when there was a Big Block in them.... I am only interested in the Short Bed configurations..... Any help would be appreciated.... Mark Booher BooherPerformance@earthlink.net |
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11-23-2012, 11:10 AM
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#2 |
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Senior Member
 
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
I am 99% sure it would of originally had a two piece. However i am not a fan or carrier bearings and i always convert to one piece driveshafts. Any good machine shop can cut a driveshaft thats too long and balance it(and switch out yokes if need be).
Posted via Mobile Device
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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11-23-2012, 08:38 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: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Quote:
I think 6 cyl manual trans swbs came with a one piece driveline. I have built many one piece driveshafts for lowered swb and lwb trucks with no problems. 2 piece drivelines do serve a purpose, they can rotate at higher speeds per a given lenth, and can be used to accomidate some strange driveline angles. If you're just building a street truck with less than 700hp that won't go over 140 mph a one piece 1310 shaft will be just fine. Don't use precision or house brand ujoints. Get some nice non greaseable spicer or neapco joints 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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11-23-2012, 09:20 PM
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#4 |
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Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
My shortbed 69 70 truck has a th400 and its a 2 pc driveshaft
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John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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11-23-2012, 10:27 PM
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#5 |
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Registered User
Join Date: Nov 2009
Location: Quinlan, Texas
Posts: 18
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
OK Guys...
I build all types of Performance cars & trucks......Thanks for the tips but..... My question is..... What came from GM in 71-72 when the Truck was a Factory Big Block \ TH400 & had a Short bed? One Piece or Two Piece? The truck will be an Original restoration type build..... It will have a BB & a Turbo 400 Transmission.....Light cam at best.... I assume these came from GM in one configuration..... just thought someone has an Original 1971-72 Big Block Short Bed or has torn down & or Built several of these over the years & can confirm the type of driveshaft used.... I do know I can make it work either way but I would like to find someone that has an original 71-72 BB truck that could tell me the answer.... Anyone have an Un-Molested Original they can look at? |
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11-23-2012, 10:46 PM
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#6 |
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Loves all GMC trucks
Join Date: Jul 2010
Location: Columbia Mo
Posts: 4,435
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
I have a BB SWB truck but it is not factory.
I searched and found an old post from Special K in 2006! http://67-72chevytrucks.com/vboard/s...d.php?t=207962 Well respected on this board... If he said it, pretty sure he knew the answer. The old driveline shop here in Wichita charged me about $140 to cut, spin balance and add the correct yoke and spicer u joints. Reasonable price for all that work. They mentioned that it's short enough for a 1 piece unit but it's only like 10 inches from their length threshold. They mentioned that the support allows for better ride quality under load (flexing I guess). Sorry for the book... Hope it helped. Mike Posted via Mobile Device |
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11-24-2012, 12:28 AM
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#7 |
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Senior Member
Join Date: Aug 2003
Location: Lubbock, Texas
Posts: 2,443
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Should be a 2 piece. Remember , there are atleast 3 different carrier bearings and brackets. If your frame was a small block it probably has a small block carrier bearing bracket rivitted to the frame. A big block bracket is bolted to the frame.
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72 Cheyenne Super 80 Silverado Blazer 2wd |
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11-24-2012, 12:50 AM
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#8 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Originally for a big block auto, 2 piece driveshaft.
__________________
68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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11-24-2012, 12:52 AM
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#9 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
and bradman, some of us arent fortunate enough to have driveline shops close. My local machine shop does an excellent job on driveshafts, I've had a few done there and no issues to date.
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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11-25-2012, 12:16 PM
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#10 | |
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the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Quote:
 We stopped building them shafts when they started wanting us to pay them to build them a shaft. You wouldn't believe how many professional mechanics don't know how to install a ujoint, seems pretty simple, and it is but people still manage to ruin ujoints and driveshafts. 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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04-08-2013, 03:15 PM
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#11 |
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Registered User
Join Date: Jan 2013
Location: McAlester, Oklahoma
Posts: 1
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Can anyone tell me if a 53" one piece driveshaft out of a 67 GMC will work in in an 86 SWB with small block and Turbo 400?
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04-08-2013, 07:38 PM
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#12 | |
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the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Quote:
The 67 gmc should have a 1310 rear ujoint. 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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04-08-2013, 10:51 PM
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#13 |
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Registered User
Join Date: Nov 2009
Location: Quinlan, Texas
Posts: 18
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
sameyrasmea72
Thanks for the information & the photos.... I think you answered my question & taught me something... I didn't know about the Bolt in vs the riveted carrier bearing brackets... I have an original unmolested 72 Longbed BB Chevy I am going to look at just to see what it has... It is a Leaf Spring truck though.... that might make a difference... My SWB was a Small Block truck for sure.... but I am converting it to a BB since it is from the frame up on the restoration... |
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04-08-2013, 10:54 PM
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#14 |
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Registered User
Join Date: Nov 2009
Location: Quinlan, Texas
Posts: 18
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Re: 1972 Big Block SWB ... Driveshaft Question... Need a little help...
Thanks for the information & the photos.... I think you answered my question & taught me something... I didn't know about the Bolt in vs the riveted carrier bearing brackets... I have an original unmolested 72 Longbed BB Chevy I am going to look at just to see what it has... It is a Leaf Spring truck though.... that might make a difference... My SWB was a Small Block truck for sure.... but I am converting it to a BB since it is from the frame up on the restoration...
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