C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Snapped detent bolt

Thread Tools
 
Search this Thread
 
Old Feb 27, 2026 | 10:47 PM
  #1  
BredBank's Avatar
BredBank
Thread Starter
4th Gear
 
Joined: Feb 2026
Posts: 4
Likes: 1
From: California
Default Snapped detent bolt

Hi, new to the forum so I may sound like an idiot explaining this but i tried doing the anti venom mod on my c6 ls3 and when i tried to install the detent assembly back, I over torqued the hell out of the bolt and snapped it right off the thread sleeve.

So right now, the sleeve is stuck in the hole and I’ve already tried using a ton of pb blaster to get it out with no luck. I am considering buying an induction heater/ bolt heater to see if that will help but honestly have no clue as to what to do besides taking it to a shop and I’m afraid they’ll have to drop the transmission to get it out. The sleeve is currently sitting about a centimeter out of the hole but won’t budge further than that. Any advice is appreciated.
The arrows pointing at the sleeve that snapped off the detent assembly
The arrow is pointing at the sleeve that snapped off the detent assembly
Reply
Old Feb 28, 2026 | 04:53 PM
  #2  
kanvasman's Avatar
kanvasman
Safety Car
10 Year Member
Liked
Community Favorite
Top Answer: 5
 
Joined: Dec 2012
Posts: 3,749
Likes: 1,658
From: Summerville SC
Default

I am not familiar with the project you are doing, but sometimes you can take a chisel, or a long wide old screwdriver, and hit the side of the sleeve, which will make it out of round. Usually once one side is not round anymore, you can take a vice grip and grab if and wiggle it out.
Reply
Old Feb 28, 2026 | 05:59 PM
  #3  
BredBank's Avatar
BredBank
Thread Starter
4th Gear
 
Joined: Feb 2026
Posts: 4
Likes: 1
From: California
Default

Originally Posted by kanvasman
I am not familiar with the project you are doing, but sometimes you can take a chisel, or a long wide old screwdriver, and hit the side of the sleeve, which will make it out of round. Usually once one side is not round anymore, you can take a vice grip and grab if and wiggle it out.


It’s supposed to be a “mod” for manual c5 and c6’s by adding a washer to the transmission detent ball assembly to make shifting more smooth and not as notchy, but I’ll take your suggestion into consideration and see if I can do it, it’s in a kind of hard to reach area
Reply
Old Mar 1, 2026 | 10:52 AM
  #4  
torquetube's Avatar
torquetube
Le Mans Master
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Dec 2004
Posts: 5,482
Likes: 796
From: West coast CA
Default

Originally Posted by BredBank
Hi, new to the forum so I may sound like an idiot explaining this but i tried doing the anti venom mod on my c6 ls3 and when i tried to install the detent assembly back, I over torqued the hell out of the bolt and snapped it right off the thread sleeve.

So right now, the sleeve is stuck in the hole and I’ve already tried using a ton of pb blaster to get it out with no luck. I am considering buying an induction heater/ bolt heater to see if that will help but honestly have no clue as to what to do besides taking it to a shop and I’m afraid they’ll have to drop the transmission to get it out. The sleeve is currently sitting about a centimeter out of the hole but won’t budge further than that. Any advice is appreciated.
I don't think heat is going to help. If it won't unscrew, the threads must have been distorted. How hard have you tried unscrewing it? Can you get Channel Locks / Vise Grips / Knipex Cobra on it? It may do more damage to the gearbox case threads on the way out, but everything is a trade-off. They will likely need to be cleaned up with a thread chaser regardless. The challenge will be to minimize the amount of metal debris you get inside the gearbox.
Reply
Old Mar 1, 2026 | 02:45 PM
  #5  
helga203's Avatar
helga203
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2010
Posts: 5,954
Likes: 711
Default

Originally Posted by BredBank
It’s supposed to be a “mod” for manual c5 and c6’s by adding a washer to the transmission detent ball assembly to make shifting more smooth and not as notchy, but I’ll take your suggestion into consideration and see if I can do it, it’s in a kind of hard to reach area
For some reason this is a hit or miss if it helps. It made mine worst, i had to take out the washers and was much better.
Reply
Old Mar 1, 2026 | 05:12 PM
  #6  
BredBank's Avatar
BredBank
Thread Starter
4th Gear
 
Joined: Feb 2026
Posts: 4
Likes: 1
From: California
Default

Originally Posted by torquetube
I don't think heat is going to help. If it won't unscrew, the threads must have been distorted. How hard have you tried unscrewing it? Can you get Channel Locks / Vise Grips / Knipex Cobra on it? It may do more damage to the gearbox case threads on the way out, but everything is a trade-off. They will likely need to be cleaned up with a thread chaser regardless. The challenge will be to minimize the amount of metal debris you get inside the gearbox.
I haven’t tried using vise grips on it due to the muffler pipes being in the way, but I do want to give that a try as well. Most I could do without removing the mufflers was using normal pliers but even then there was no budge
Reply
Old Mar 1, 2026 | 05:13 PM
  #7  
BredBank's Avatar
BredBank
Thread Starter
4th Gear
 
Joined: Feb 2026
Posts: 4
Likes: 1
From: California
Default

Originally Posted by helga203
For some reason this is a hit or miss if it helps. It made mine worst, i had to take out the washers and was much better.

I recently installed the mgw short shifter and It kind of takes a little bit more effort to get into first and second than I’d like, although I know the tr6060 is known for that
Reply
Old Mar 1, 2026 | 07:49 PM
  #8  
helga203's Avatar
helga203
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2010
Posts: 5,954
Likes: 711
Default

Originally Posted by BredBank
I recently installed the mgw short shifter and It kind of takes a little bit more effort to get into first and second than I’d like, although I know the tr6060 is known for that
and that shifter is know to make it harder to shift. Hope you have to get a little relieve with the notchyness. is that even a word. Lol
Reply

Get notified of new replies

To Snapped detent bolt

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-1

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-2

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-3

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-4

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-5

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-6

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-7

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-8

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
story-9

7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette

 Pouria Savadkouei




All times are GMT -4. The time now is 06:53 AM.

story-0
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-1
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
story-2
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-3
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-4
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-5
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-6
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-7
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-8
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE
story-9
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette

Slideshow: Check out these easy-to-install upgrades from Extreme Online Store that reshape the look and feel of the C6 Corvette.

By Pouria Savadkouei | 2026-03-23 17:00:27


VIEW MORE