Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
|
01-17-2021, 09:07 PM | #1 |
Registered User
Join Date: Nov 2011
Location: USA
Posts: 393
|
One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
Is anybody running a one piece drive shaft in a 1967-1968 Chevy C10 Short Bed that has been lowered maybe 4 inches in front and 6 inches out back?
I am wanting to replace the factory two piece system as I think one of the bearings is going out and I have wanted to go to a new one piece anyways. |
01-17-2021, 09:35 PM | #2 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,210
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
I always prefer a one piece shaft.
Most squarebody short beds were one piece, with rare exceptions, so I would think a reputable shop could whip one up for you. 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/ |
01-17-2021, 10:35 PM | #3 |
Registered User
Join Date: Nov 2011
Location: USA
Posts: 393
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
I wonder if any modifications are needed to the chassis or crossmember in order to run a one piece driveshaft after the truck is lowered?
|
01-18-2021, 08:41 AM | #4 |
Registered User
Join Date: Jan 2011
Location: Delaware and Long Island, New York
Posts: 3,455
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
I thought all short beds were one piece?, every one I ever had was, including my current one, a stock 67.
|
01-18-2021, 08:48 AM | #5 |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
I've had quite a few short beds over the years. Some came stock with one piece, others with two piece. It depended on the drivetrain and differential ratio as to which it was built with.
__________________
I'm on the Instagram- @Gearhead_Kevin |
01-18-2021, 09:02 AM | #6 |
Registered User
Join Date: Jan 2011
Location: Delaware and Long Island, New York
Posts: 3,455
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
Thanks for the info Kevin, figured since my 67 has the tiny SM318, any other combo would definitely still have a one piece. Always learning
|
01-18-2021, 10:43 AM | #7 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,994
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
All of mine have been one piece shafts. My old roommate had multiple trucks w/2pc shafts so it boils down to the combo it came with from GM.
The 1pc shaft will work/fit w/a 4/6 drop. Driveshaft OD might make it a tight fit @ the upper portion of the front T/A mounting x-member hoop.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
01-19-2021, 11:45 AM | #8 |
Registered User
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,136
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
The last one I did we just went to the local junkyard which had an old pickup bed full of driveshafts. Measured up one the right length, got new U-joints, and installed it, no issues.
|
01-19-2021, 12:14 PM | #9 |
Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
I have one in my 71. No modifications to the frame were necessary.
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
01-19-2021, 02:03 PM | #10 |
Registered User
Join Date: May 2017
Location: Inman/Boiling Springs, SC
Posts: 420
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
Make sure your angles are good. I recently swapped to a one piece (2/4 drop) and had to adjust the pinion angle 4 degrees.
__________________
1985 C10 shortbed, current project. Member of the Upstate SC GM Truck Club. |
01-19-2021, 02:11 PM | #11 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,210
|
Re: One piece driveshaft for 4/6 lowered 1968 Chevy C10 short bed?
Quote:
It is affected by length, outside diameter, wall thickness, material, mass and rpm. Highest shaft rpm is affected by vehicle top speed, rear axle ratio and tire diameter. Length is affected by wheelbase and driveline configuration (trans length, t case, etc). The driveline is also affected by any unusual or unpredicted system resonances, which can crack a Tcase or some other failure mode even at a speed lower than the critical rpm. From an OE perspective the driveshaft choice (one piece vs two piece) can be manipulated by controlling any one or more of those variables. Vehicle top speed is limited by several different components, including tire speed rating or driveshaft critical speed. Sometimes the driveline is the designated "fuse" (as directed by the program team) and speed is controlled through the use of fuel or ignition cutoff or some other ECM parameter, in order to maintain a one piece system as a cost save or warranty avoidance. 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/ Last edited by Keith Seymore; 01-19-2021 at 02:27 PM. |
|
Bookmarks |
|
|