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 > The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-25-2018, 04:20 PM   #1
cal30_sniper
Registered User
 
cal30_sniper's Avatar
 
Join Date: Jan 2011
Location: Coastal NC
Posts: 276
Suburban Driveshaft Question

Do K10/K20 Suburbans use a 1-piece or 2-piece driveshaft? All the 2WDs I've worked on had a 2-piece driveshaft, but the intermediate shaft is pretty short. I'm wondering with the extra length of the transfer case, did 4x4 Suburbans just use a 1-piece rear driveshaft from the T-case to the rear axle, or a really short intermediate shaft?
__________________
86 Chevrolet K20/30 Suburban - 8.1/NV4500/NP205/Dana 60/14 bolt FF, build in progress
73 Formula - 400/Doug Nash 4+1, resto on hold
86 Chevrolet K30 3+3 - 350/TH400/NP241, Air Force/Forest Service Rescue Truck, for sale
01 Ram 2500 - 5.9L Magnum, daily driver
91 BMW 325i - Chumpcar series racecar
cal30_sniper is offline   Reply With Quote
Old 05-25-2018, 09:09 PM   #2
Edahall
Registered User
 
Join Date: May 2011
Location: Goliad, TX
Posts: 653
Re: Suburban Driveshaft Question

My 1982 C10 Suburban has a 1 piece driveshaft.
Edahall is offline   Reply With Quote
Old 05-26-2018, 01:01 PM   #3
mongocanfly
Senior Member
 
Join Date: May 2015
Location: Alabama
Posts: 7,054
Re: Suburban Driveshaft Question

4x4 2500 burb has 1pc d-shaft...
__________________
Mongo...aka Greg

1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
mongocanfly is offline   Reply With Quote
Old 05-27-2018, 12:31 PM   #4
rocky_mtn_man
Registered User
 
Join Date: Jan 2017
Location: Superior Colorado
Posts: 3
Re: Suburban Driveshaft Question

My '91 V2500 4WD Suburban has a one piece rear driveshaft. With 4WD, the rear shaft is shorter so there is no need for a longer shaft with carrier bearing. This 4WD drivetrain is much smoother than my older RWD '74 Suburban, where I had to replace the carrier bearing and take the shafts to a drivetrain shop for professional balancing and to replace the u-joints.

I had a hammering vibration develop under no load at 45mph recently and inspected both driveshafts; when researching online I found an answer to a worry I had about the front driveshaft. It is splined so that it can move forward and backward when turning or going over bumps, and there is a grease fitting which I lubed, along with all the other front end parts accepting grease.

I was investigating why when you don't have 4WD engaged the front driveshaft can rotate back and forth about 1/16" of a revolution. Jeep and 4-runner forums said this is completely normal and don't worry about it. If there is any up and down slop in the differential yoke or the transfer case then you have a problem.

My vibration problem turned out to be old worn out tires that were letting go all at once, internal belts were separating and banging on them with a wood block and sledgehammer to free them from the hub (due to rust) probably didn't help matters. I had Big O tires put it on a lift to make sure the drivetrain was ok, it was only $65 for a half hour diagnostic check to rule out any drivetrain problems. I was on the right track by starting to swap in another tire set I had and the problem improved with the first tire I put on.

Thought I would reply to this thread, aptly named, and mention the small, expected rotation of the front driveshaft when 4WD is not engaged, in case anyone searching these boards is wondering about that.
rocky_mtn_man is offline   Reply With Quote
Old 05-27-2018, 12:39 PM   #5
Keith Seymore
Senior Member
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 7,420
Re: Suburban Driveshaft Question

All 4wd Suburbans had a one piece shaft.

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - Present
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 05-27-2018, 02:53 PM   #6
cal30_sniper
Registered User
 
cal30_sniper's Avatar
 
Join Date: Jan 2011
Location: Coastal NC
Posts: 276
Re: Suburban Driveshaft Question

Thanks for the help gents, exactly the answers I was looking for.
__________________
86 Chevrolet K20/30 Suburban - 8.1/NV4500/NP205/Dana 60/14 bolt FF, build in progress
73 Formula - 400/Doug Nash 4+1, resto on hold
86 Chevrolet K30 3+3 - 350/TH400/NP241, Air Force/Forest Service Rescue Truck, for sale
01 Ram 2500 - 5.9L Magnum, daily driver
91 BMW 325i - Chumpcar series racecar
cal30_sniper is offline   Reply With Quote
Old 06-01-2018, 01:45 AM   #7
Jsfucttruck
Registered User
 
Join Date: Jul 2011
Location: Aptos
Posts: 363
Re: Suburban Driveshaft Question

Quote:
Originally Posted by Keith Seymore View Post
All 4wd Suburbans had a one piece shaft.

K
Negative. My 78k20 burb with a 465/205 and a 14bff had a 2 piece.
Factory.
Attached Images
 
Jsfucttruck is offline   Reply With Quote
Old 06-03-2018, 03:05 PM   #8
Keith Seymore
Senior Member
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 7,420
Re: Suburban Driveshaft Question

Dang it.

"All auto trans 4wd Suburbans had a one piece shaft".

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - Present
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 06-04-2018, 11:22 AM   #9
cal30_sniper
Registered User
 
cal30_sniper's Avatar
 
Join Date: Jan 2011
Location: Coastal NC
Posts: 276
Re: Suburban Driveshaft Question

Quote:
Originally Posted by Jsfucttruck View Post
Negative. My 78k20 burb with a 465/205 and a 14bff had a 2 piece.
Factory.
I wonder if that's because the 205 is so much shorter than a 208/231? There's a 6" difference in rear driveshaft length between the two. Also might have something to do with the 205 being mostly fixed yokes.

Interesting though, as a 205 is where I'd like to end up with mine. Guess I'll need to hang onto the two-piece setup after all.
__________________
86 Chevrolet K20/30 Suburban - 8.1/NV4500/NP205/Dana 60/14 bolt FF, build in progress
73 Formula - 400/Doug Nash 4+1, resto on hold
86 Chevrolet K30 3+3 - 350/TH400/NP241, Air Force/Forest Service Rescue Truck, for sale
01 Ram 2500 - 5.9L Magnum, daily driver
91 BMW 325i - Chumpcar series racecar
cal30_sniper is offline   Reply With Quote
Old 06-04-2018, 12:32 PM   #10
68Timber
I know the pieces fit
 
68Timber's Avatar
 
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,087
Re: Suburban Driveshaft Question

The SM465 is very short as well.
__________________
John

79 2wd Blazer (Bruiser)
85 M1009 Blazer (Sarge) build
74 Honda Z50 build
68Timber is offline   Reply With Quote
Old 06-04-2018, 06:25 PM   #11
cal30_sniper
Registered User
 
cal30_sniper's Avatar
 
Join Date: Jan 2011
Location: Coastal NC
Posts: 276
Quote:
Originally Posted by 68Timber View Post
The SM465 is very short as well.
The SM465 itself is short, but with the 205 adapter, itís within +/- an inch of a TH400 with an adapter on it.
Posted via Mobile Device
cal30_sniper is offline   Reply With Quote
Old 06-13-2018, 02:23 PM   #12
Jsfucttruck
Registered User
 
Join Date: Jul 2011
Location: Aptos
Posts: 363
Re: Suburban Driveshaft Question

465/205 with a slip yoke rear outputs have a 1 piece rear shaft..

465/208 come all with a slip yoke rear output as well.
1 piece rear.
Jsfucttruck is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 02:32 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com