C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

replacing u-joints

Thread Tools
 
Search this Thread
 
Old Sep 25, 2014 | 01:32 PM
  #1  
markyerger's Avatar
markyerger
Thread Starter
Le Mans Master
20 Year Member
 
Joined: Oct 2002
Posts: 9,737
Likes: 0
From: You are here to build strength, not demonstrate it
St. Jude Donor '08
Default replacing u-joints

Gonna replace the u-joints in my '71.

I have the Service Manual, and "my dad's a TV repairman...he's got lots of tools"

To all who have done this:
any words of encouragement or little tid-bits that you think would help me??


she's got the clunk in the trunk syndrome and I need a project
Reply
Old Sep 25, 2014 | 02:37 PM
  #2  
1969RAY's Avatar
1969RAY
Burning Brakes
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2009
Posts: 1,237
Likes: 288
From: ESCONDIDO CA
2025 C2 of the Year ('63 and '67) Finalist - Unmodified
C2 of Year Finalist (appearance mods) 2019
Default

Driveline is straight forward-pretty easy.
I replaced both half shafts, complete with
new u-joints. Saved time and misery.
Reply
Old Sep 25, 2014 | 02:45 PM
  #3  
jnealg's Avatar
jnealg
Burning Brakes
 
Joined: Apr 2010
Posts: 1,018
Likes: 9
From: Winston Ga.
Default

i think the thunk in the trunk is usually (at least it was on mine) the mounting brackets for the diff and/or the xmission mount. check those before tearing into the drive line.
Reply
Old Sep 25, 2014 | 03:55 PM
  #4  
TimAT's Avatar
TimAT
Le Mans Master
15 Year Member
Liked
Loved
 
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Default

IF you replace the joints in the half shafts, make sure you bolt the flange to something solid BEFORE you attempt to remove or install them. Those flanges are pretty tough in torque, but easy to bend directionally. The flanges must be supported or they will bend and make it impossible to fit the new joints.
Reply
Old Sep 25, 2014 | 03:59 PM
  #5  
DABall's Avatar
DABall
Instructor
 
Joined: Jul 2013
Posts: 104
Likes: 15
From: Bennington VT
Default

I just replaced both rear u-joints in my 70 last weekend. What is critical is that the flange that holds the u-joint and bolts into the outside of both wheels is not square. You must bolt that flage to a piece of wood in order not to break the part when you extract the u-joint. I learned this hard way and had to purchased 2 complete halfshafts and flanges with the u-joints already installed and it took less than twenty minutes to bolt them in. I purchased the complete halfshafts parts from VanSteel and they were great to work with and would highly recommend.
Reply
Old Sep 25, 2014 | 04:48 PM
  #6  
markyerger's Avatar
markyerger
Thread Starter
Le Mans Master
20 Year Member
 
Joined: Oct 2002
Posts: 9,737
Likes: 0
From: You are here to build strength, not demonstrate it
St. Jude Donor '08
Default

Originally Posted by DABall
I just replaced both rear u-joints in my 70 last weekend. What is critical is that the flange that holds the u-joint and bolts into the outside of both wheels is not square. You must bolt that flage to a piece of wood in order not to break the part when you extract the u-joint. I learned this hard way and had to purchased 2 complete halfshafts and flanges with the u-joints already installed and it took less than twenty minutes to bolt them in. I purchased the complete halfshafts parts from VanSteel and they were great to work with and would highly recommend.
I looked on the VS website first and they did not have them for the early C3's.
only 75 and up
(well, thats what the website says )

I'll give vansteel a call
Reply
Old Sep 25, 2014 | 06:30 PM
  #7  
joes69vette's Avatar
joes69vette
Cruising
15 Year Member
 
Joined: Jul 2003
Posts: 13
Likes: 1
From: Lansdale PA
Default

I took the half shafts out of my 1969 about a week ago. Ended up having to cut 3 of the 4 u-bolts off. Sprayed PB Blaster on the u-joints for a week then tried pressing them out with a vise. They wouldn't budge. I was afraid to take a hammer to them so I took them to a machine shop. He even had problems with getting them out - and I don't think these were original because two of them had grease fittings. Machine shop charged $75. I still have to clean them up, paint them and install the new u-joints. Van Steel has them rebuilt with solid u-joints for $85.99. If I had to do it again, I'd send them out.
Reply
Old Sep 25, 2014 | 06:56 PM
  #8  
DUB's Avatar
DUB
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Default

For what it is worth...make sure that you do not install U-joints with grease fitting in them....and I use SPICER U-joints also. In my opinion they are worth getting. It is what I install at my shop.

DUB
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-1

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-2

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-3

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Sep 25, 2014 | 08:48 PM
  #9  
Gale Banks 80''s Avatar
Gale Banks 80'
Safety Car
15 Year Member
Photogenic
Photoriffic
Top Answer: 1
 
Joined: Nov 2008
Posts: 3,713
Likes: 550
From: Seattle Washington
Default

When I remove them I use a Cutting Torch and cut the U-Joint in 1/2 before I even start trying to press them out. Once cut in 1/2 You are only pressing one side out at a time and the chance of bending is greatly reduced. Generally they just tap out with a small hammer.
Reply
Old Sep 25, 2014 | 10:11 PM
  #10  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

i avoided the hassle and had a pair made by a company in tampa i think it was less than 400 for the pair heavier gauge steel balanced painted ,spicer joints. i think the difference in price compared to running the risk of bending something and buying the joints was worth it. they said they are good for 600 h.p. i believe it. we used to make 1/2 shafts using ford 1 ton van driveshaft tubes these are better .
Reply
Old Sep 26, 2014 | 02:23 PM
  #11  
Tampa Jerry's Avatar
Tampa Jerry
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
 
Joined: Aug 2005
Posts: 6,513
Likes: 1,949
From: Temple Terrace Florida
Default U Joints

Very easy to remove from the car and send to a shop. I had six joints replaced with Spicers for about $135. They even balanced my driveshaft for me. Dropped them off in the morning and got them back a few hours later. Jerry
Reply

Get notified of new replies

To replacing u-joints





All times are GMT -4. The time now is 02:55 PM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE