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

T56 problem with reverse and 6th

Thread Tools
 
Search this Thread
 
Old Apr 14, 2008 | 06:53 PM
  #1  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default T56 problem with reverse and 6th

Hey guys, so last month I was driving home and I noticed that my shift paths seemed a little off. I made it home, but the next morning i woke up to find I couldnt get my car into reverse or 6th. It was like those gears were 'locked' out.

So i checked the easy stuff first, reverse lock solenoid (no engine codes), bled my clutch for half an hour (i have one of those remote speed bleeder lines), and finally resorted to replacing my master and slave cylinder.

Well after I replaced the master / slave I was able to get it into reverse and 6th. So I went for a test drive, only to find that when i got home I couldnt use reverse again. As a side note, around 9 months ago I took my trans into an AAMCO to have them check it out, once I got it back from them third gear would rattle at high RPMS and 6th gear would RARELY not go into gear. I would need to double clutch and it would work. Also, if i was breaking hard and while trying to shift from 6th, it wouldnt come out of gear.

Has anyone ever heard of something like this? Any ideas or recommendations to offer?


I probably should have my transmission rebuilt, so I'm thinking thats my next course of action. So if anyone knows of a decent shop in the chicagoland area, please hit me up.

Thanks guys,

-Erik
Reply
Old Apr 14, 2008 | 09:34 PM
  #2  
defenestrate's Avatar
TECH Regular
iTrader: (1)
 
Joined: Oct 2006
Posts: 422
Likes: 0
From: south jersey
Default

sounds like a rebuild to me...i had similar problems. might as well get a new clutch while your at it.
Reply
Old Apr 15, 2008 | 12:25 AM
  #3  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default

The LS6 clutch in there has <30k miles on it, so I probably wont to change it.

A little followup though. I drove it to the ladys place tonight, and noticed that I now can barely shift into 5th gear, but 6th works fine when moving. Reverse is intermittent while parked, but I can usually get it into reverse after driving for ahwile. I've resorted to putting it into reverse when parking, because 1st has only barfed once..

A friend of mine says theres a shop around here that rebuilt his automatic for $600. Hopefully the manual will be around the same.


$0.02
This car is a beast
Reply
Old Apr 15, 2008 | 02:58 PM
  #4  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default

bump up
Reply
Old Apr 15, 2008 | 03:01 PM
  #5  
thebart455's Avatar
TECH Apprentice
 
Joined: Oct 2007
Posts: 303
Likes: 0
From: eastern ky
Default

yea if your having that many problems i would just go ahead and rebuild it, and i would go ahead a put a new clutch in it too cause you dont want to put it back together and it start slipping
Reply
Old Apr 16, 2008 | 06:55 PM
  #6  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default

So now it wont stay in 3rd, 5th and 6th are gone, and I'm pricing shops.
Reply
Old Apr 23, 2008 | 05:23 PM
  #7  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default

If you have a manual transmission, this guide is very helpful for diagnosing problems.

http://www.ttcautomotive.com/English...ice_Manual.pdf


the shop i took it to here quoted me at $2300 for parts, and $300-500 in labor. Said they were going to put in all GM stuff so parts were costly. Thought it was funny that he was so concerned with getting it back to stock so that it wouldnt break again.. The whole time im thinking the reason that it broke was because i beat the **** outa those _GM_ parts
Reply
Old May 9, 2008 | 03:11 PM
  #8  
circut's Avatar
Thread Starter
Teching In
 
Joined: Apr 2007
Posts: 25
Likes: 0
Default

So to follow up, the good people at t56 rebuilds hooked me up for <700 with all the stuff I needed (recall shop quote at just shy of $3k)

Then charged me for 5 hours of labor.

So bottom line:
$1100 for parts n labor (t56 rebuilds + superior transmission)
6 hours of my time to remove / install the trans

Yay for muscle cars!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

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

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo




All times are GMT -5. The time now is 05:51 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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