C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Differential Front Mount Bracket frustration

Thread Tools
 
Search this Thread
 
Old Mar 20, 2023 | 01:57 PM
  #1  
allezm2's Avatar
allezm2
Thread Starter
3rd Gear
 
Joined: Dec 2022
Posts: 3
Likes: 0
Default Differential Front Mount Bracket frustration

Good afternoon. My 16 year old son and I picked up a project car last summer and have been slowly fixing items and working in it. It is a 78, that was sitting for 20 years. After some minor work, a carb rebuild and various other items, not to mention remvoing all the mouse stuffing and droppings throught the interiror of the car we have hit an obstacle I just cant get past.
We replaced the snubber bushing, as we were getting a loud clunk when shifting into gear, and found some threads on that being the potential issue. The new bushing is in, BUT I had ot remove the bolts that hold the bracket onto the rear differential. I have tightened the bushing bolt, and even got the rear bracket bolt in, but for the life of me, the middle bolt will not line up. It is currently too low, and needs to come up to align the holes, but cant figure out how to get it to come up. I thought maybe I needed to tighten the snubber bolt, but I cant get it any tighter and it still doesnt line up.

Any ideas on how to get the bracket to move up, or maybe rotate the differential down to get the bolts to line up? I am at work now, but can add pictures later today.

Thanks!
Reply
Old Mar 20, 2023 | 02:30 PM
  #2  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,419
Likes: 1,555
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default



Which bolt is not lining up, #7?
Reply
Old Mar 20, 2023 | 02:52 PM
  #3  
allezm2's Avatar
allezm2
Thread Starter
3rd Gear
 
Joined: Dec 2022
Posts: 3
Likes: 0
Default

Correct, #7, the one towards the front of the car.

Originally Posted by Peterbuilt


Which bolt is not lining up, #7?
Reply
Old Mar 20, 2023 | 05:56 PM
  #4  
doorgunner's Avatar
doorgunner
2026 Loser of the Year
Supporting Member
10 Year Member
Veteran: Army
Photogenic
Photoriffic
 
Joined: Sep 2013
Posts: 36,573
Likes: 7,016
From: New Or-leens Loo-z-anna
Default

It's a pain to get everything lined up...that much I remember!
I think I reinstalled #7 & #8 bolts first.
Then I installed the snubber grommet using a pry bar to get enough clearance to tap the grommet in with a hammer (I think ) Make sure ti install the snubber parts according to the diagram, or the grommet will fail/rip apart.

Let us know if you succeed.
Reply
Old Mar 20, 2023 | 06:32 PM
  #5  
Luke0312's Avatar
Luke0312
Advanced
15 Year Member
 
Joined: Aug 2006
Posts: 81
Likes: 55
Default

I thought I had to take that bracket off to get the snubber changed, so took #7 out, but couldn't get #8 out. Went back to trying to get the snubber changed without removing the bracket and figured out a way. However, after getting the snubber changed, couldn't get #7 back in the hole. If I remember correctly, I put a jack under the front of the bracket and got it lined back up with it.
Reply
Old Mar 20, 2023 | 07:33 PM
  #6  
Mooser's Avatar
Mooser
Race Director
10 Year Member
 
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
Default

Bracket on the diff first, then large prybar underneath with a strap / chain around the nose of the bracket and out the rear, lift the bar and it'll pull the nose down enough to get the bushing in between. Watch your fingers
M
Reply
Old Mar 20, 2023 | 07:47 PM
  #7  
AKjeff's Avatar
AKjeff
Pro
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2010
Posts: 588
Likes: 246
From: Carson Valley
Default

I did mine while reinstalling the diff, I think I loosened the diff cross member bolts (after tightening them of course) to allow some wiggle room.
Reply
Old Mar 20, 2023 | 08:40 PM
  #8  
doorgunner's Avatar
doorgunner
2026 Loser of the Year
Supporting Member
10 Year Member
Veteran: Army
Photogenic
Photoriffic
 
Joined: Sep 2013
Posts: 36,573
Likes: 7,016
From: New Or-leens Loo-z-anna
Default

There Ya' go...5 ways to skin that cat
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

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

 Joe Kucinski
story-5

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

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

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

 Michael S. Palmer
story-8

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

 Joe Kucinski
story-9

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

 Michael S. Palmer
Old Mar 21, 2023 | 11:02 AM
  #9  
allezm2's Avatar
allezm2
Thread Starter
3rd Gear
 
Joined: Dec 2022
Posts: 3
Likes: 0
Default

Thanks everyone, yup, sounds like i need to uninstall and reinstall, using bolt 7 and 8 FIRST, then struggle with the rest. *sigh* Due to his soccer schedule, looks like that will be in a couple of weeks.

Thanks again for the insight!
Reply
Old Mar 21, 2023 | 05:54 PM
  #10  
loup68's Avatar
loup68
Melting Slicks
Supporting Lifetime
10 Year Member
Veteran: Army
Liked
Community Favorite
 
Joined: Jan 2012
Posts: 3,034
Likes: 503
From: myrtle beach sc
Army
Default

Yes, install the two differential carrier bolts first. Make sure that you remove that # 8 bolt somehow. Even if you have to cut or grind it to get it out. It won't be any easier to remove a couple of years from now. ALWAYS put never-seize on any nuts and bolts to be able to remove them later on.I cheat on the snubber bushing install and put the nut on the top and the bolt from the bottom. Makes things a lot easier and no skinned knuckles. There really is hardly any room to put that bolt in from the top. Just be sure to use a lock washer under the nut and then the flat washer. Lou.
Reply

Get notified of new replies

To Differential Front Mount Bracket frustration





All times are GMT -4. The time now is 04:39 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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