Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

New rebuild Problems

Thread Tools
 
Search this Thread
 
Old Aug 7, 2008 | 09:31 AM
  #1  
projectcam's Avatar
Thread Starter
Launching!
iTrader: (12)
 
Joined: May 2005
Posts: 296
Likes: 0
From: Mesa, Az
Angry New rebuild Problems

I just had the dealer ship put in new blocker ringers and synchros and my trans doesnt want to stay in third gear. When it pops out it makes a grinding noise. Any Ideas what it is? They told me My pro 5.0 is worn and needs replaced but every other gear works fine. Any input would be appreciated.
Reply
Old Aug 7, 2008 | 10:39 AM
  #2  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

Just make sure the stops on the shifter are backed out first.

Popping out results when it's not engaged fully. Usually either the synchro keys are broken or not working, or the shift fork has worn/missing pads or has been bent.

Double check the shifter stops, then take it back to the dealer and have them rebuild if the shifter stops are not in the way.

mike
Reply
Old Aug 7, 2008 | 10:52 AM
  #3  
projectcam's Avatar
Thread Starter
Launching!
iTrader: (12)
 
Joined: May 2005
Posts: 296
Likes: 0
From: Mesa, Az
Default

I already tightened the screws, there in far enough where the shifter doesnt even touch them. They said they replaced the Synchro assembly's and all the shift fork pads. Could a worn out shifter head be causing it to not fully engage? I am planning on removing it tonight but really dont want my car to have to go back in. They took 3 and a half weeks with it to rebuild it the first time.
Reply
Old Aug 7, 2008 | 12:45 PM
  #4  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

Originally Posted by projectcam
Could a worn out shifter head be causing it to not fully engage?
Anything is possible. If you have the stock shifter, or access to another aftermarket one, it's easy enough to check. If the dealer didn't put in a steel 3/4 fork during the rebuild, I'd keep that on the suspect list.
Reply
Old Aug 7, 2008 | 06:52 PM
  #5  
TDP's Avatar
TDP
FormerVendor
iTrader: (23)
 
Joined: Aug 2003
Posts: 800
Likes: 0
From: Fort Worth, TX
Default

It is NOT the shifter. You need a new 3-4 slider or 3rd gear, or maybe both. Dealerships can be really stupid, as we all know...
Reply
Old Aug 7, 2008 | 08:06 PM
  #6  
greysteel_M6's Avatar
TECH Resident
15 Year Member
iTrader: (5)
 
Joined: Dec 2006
Posts: 871
Likes: 1
From: DFW
Default

Only grinding in thrid, I doubt it's the shifter, probably should send it back since the dealer should have fixed it, and while it's out bring them a set of bronze fork pads (the stockers are plastic), a steel 3/4 fork, and have them replace the 3/4 slider.
Reply
Old Aug 7, 2008 | 09:42 PM
  #7  
thesource's Avatar
Banned
iTrader: (60)
 
Joined: Mar 2005
Posts: 2,693
Likes: 0
From: Adkins - Tx
Default

Transmission builders that work at dealerships are some of the stupidest builders I have ever come across . If the problem is not listed in their repair manual or all data , they have no freakin clue . I cannot tell you how many times I have personally had to go to a dealership and help either diagnose an issue or straight up fix it for them . I am not sure if they are the same with automatics but I would bet they are .

If its got issues in 3rd gear and you are 100% sure the shifter is adjusted correctly , I would say you need to replace the 3-4 shift fork as well as the 3-4 syncro keys . I always replace them even if they are not broken . If the customer cannot afford the billet keys , I still replace the stock keys with new stock keys .
Reply
Old Aug 8, 2008 | 01:48 AM
  #8  
projectcam's Avatar
Thread Starter
Launching!
iTrader: (12)
 
Joined: May 2005
Posts: 296
Likes: 0
From: Mesa, Az
Default

Thanks For all the replys guys. I am pretty sure its the shift fork now after reading some on the subject. Looks like I am taking it back to the stealership...
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Aug 8, 2008 | 08:25 AM
  #9  
BlackScreaminMachine's Avatar
Internet Mechanic
20 Year Member
iTrader: (17)
 
Joined: May 2005
Posts: 9,830
Likes: 2
From: Wallingford CT
Default

Its not the shifter.

Hell get a stock one and prove them wrong.
Reply
Old Aug 8, 2008 | 06:38 PM
  #10  
projectcam's Avatar
Thread Starter
Launching!
iTrader: (12)
 
Joined: May 2005
Posts: 296
Likes: 0
From: Mesa, Az
Default

I talked to my buddy that took my car in to the dealer for work as was told the fork was changed??? Any other things it could be?? Maybe the pilot bearing?
Reply
Old Aug 8, 2008 | 08:07 PM
  #11  
TDP's Avatar
TDP
FormerVendor
iTrader: (23)
 
Joined: Aug 2003
Posts: 800
Likes: 0
From: Fort Worth, TX
Default

Originally Posted by projectcam
I talked to my buddy that took my car in to the dealer for work as was told the fork was changed??? Any other things it could be?? Maybe the pilot bearing?
Originally Posted by TDP
It is NOT the shifter. You need a new 3-4 slider or 3rd gear, or maybe both. Dealerships can be really stupid, as we all know...

^^^^^
Reply
Old Aug 8, 2008 | 08:39 PM
  #12  
projectcam's Avatar
Thread Starter
Launching!
iTrader: (12)
 
Joined: May 2005
Posts: 296
Likes: 0
From: Mesa, Az
Default

Originally Posted by TDP
^^^^^
I missed that post, I am going to take it back to them soon.
Reply




All times are GMT -5. The time now is 02:39 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE