Front Driveshaft CV joint rebuild - Blazer Forum - Chevy Blazer Forums

Steering, Suspension & Drivetrain Questions about your steering, suspension, axles, and/or transfer case? Post up here.

Front Driveshaft CV joint rebuild

  #1  
Old 12-28-2018, 01:51 PM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default Front end noise

I'll ask here too.

I've got a loud popping and banging in the front end. So far, I've replaced the front differential, both CV axles, both hubs, upper and lower ball joints on both sides, both inner and outer tie rod ends, transfer case and even the front driveshaft CV joint. The sound persists.

What it's doing is making a popping and banging with the speed of the vehicle. It does it the most when turning hard, like when parking. It makes the noise when accelerating or decelerating. After about 40mph, it can be felt but not heard.

It didn't just happen, it started a few months ago and got worse. It used to only do it on hard acceleration, but it got to the point where it does it all the time. I don't know what else it could be.

1997 Oldsmobile Bravada, awd, 3.73 diff
 

Last edited by No false Bravada; 01-05-2019 at 05:09 AM. Reason: N
  #2  
Old 01-05-2019, 05:31 AM
error_401's Avatar
Moderator
Join Date: Nov 2007
Location: Zurich
Posts: 1,063
error_401 is on a distinguished road
Default

Ah, o.k.

Apart from checking the suspension and steering I'd look in to the engine mounts and further back have a look at the transmission and transfer case support.

Engine mounts can cause this too when worn or broken. Not sure if sagging engine mounts could make it touch the frame on acceleration/deceleration due to the moment induced.
 
  #3  
Old 01-05-2019, 06:01 AM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default

It does this even if I'm not accelerating hard. I can just let off the brake, turn hard and it does this. I'll try to get a video shortly.
 
  #4  
Old 01-05-2019, 07:00 AM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default

Update

I disconnected the front driveshaft from the front diff and tried turning hard in both directions. I didn't go very far, only about 20-30 feet or so in forward and reverse, hard turns to both sides. No popping. Reattached the driveshaft, pops and bangs again. Last thing left that could be making it do this? U joint (s) on the front shaft. They're fairly cheap, like $14.99 at AutoZone for moog. I'll be getting both to be sure.

Final question. The OEM joints look like the kind that don't have snap rings. They look like the kind with the little plastic pin holding them together. How do you get those out?
I remember hearing my dad say something about using a torch on his K1500 Silverado (93) to get the old ones out. Is that the same with these?
 
  #5  
Old 01-05-2019, 08:08 AM
chevyriders's Avatar
Moderator
Join Date: Apr 2013
Location: NY
Posts: 822
chevyriders is on a distinguished road
Default

Same deal as the k1500. They are locked in with nylon. Heat around the caps with a torch, and watch for the nylon squeezing out of the passageway. Once it stops, press or hammer the ujoints out.
 
  #6  
Old 01-05-2019, 08:41 AM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default

Will a handheld propane or map gas torch work, or does it have to be an oxy acetylene torch?
 
  #7  
Old 01-05-2019, 08:54 AM
chevyriders's Avatar
Moderator
Join Date: Apr 2013
Location: NY
Posts: 822
chevyriders is on a distinguished road
Default

I've always used map gas. Propane would be plenty too, although would take a bit longer.
 
  #8  
Old 01-06-2019, 12:19 PM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default

Feeling defeated here. There's some kind of link in between the front driveshaft u joints that's the actual problem. I'm tired of throwing money and parts at this. I'll have to get another from a junkyard. AutoZone wants $1,324 for one. Lel I can replace the vehicle for less than that.

Closest, cheapest junkyard is 100+ miles away, but they have it pulled. I'll just get it shipped.
 
  #9  
Old 01-06-2019, 02:05 PM
christine_208's Avatar
Super Member
Join Date: Dec 2016
Location: Moscow, ID
Posts: 1,855
christine_208 is on a distinguished road
Default

Originally Posted by No false Bravada View Post
Feeling defeated here. There's some kind of link in between the front driveshaft u joints that's the actual problem. I'm tired of throwing money and parts at this. I'll have to get another from a junkyard. AutoZone wants $1,324 for one. Lel I can replace the vehicle for less than that.

Closest, cheapest junkyard is 100+ miles away, but they have it pulled. I'll just get it shipped.
What are you using for a repair manual? According to my GM service manual all the joints appear to be repairable.
 
  #10  
Old 01-06-2019, 02:15 PM
No false Bravada's Avatar
Starting Member
Thread Starter
Join Date: Feb 2015
Location: Virginia
Posts: 180
No false Bravada is on a distinguished road
Default


It's in the circle, the part with the dot. There's a link inside that's bad. The u joints weren't the problem either. I could reach the joints just fine I could even remove them, but the link inside is what's bad. I don't know what it's called. There's a grease fitting that feeds grease to it.
 

Last edited by No false Bravada; 01-06-2019 at 02:20 PM.

Thread Tools
Search this Thread
Quick Reply: Front Driveshaft CV joint rebuild


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.