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

T-56 5th gear problems

Thread Tools
 
Search this Thread
 
Old May 13, 2009 | 09:02 AM
  #1  
ryanater's Avatar
Thread Starter
On The Tree
15 Year Member
iTrader: (2)
 
Joined: Apr 2007
Posts: 176
Likes: 0
Default T-56 5th gear problems

So I have posted this before but I didn't get much response so here goes again....

I missed 3rd gear about a year ago at the drag strip and ever since then my car won't go from 6th to 5th at all. It won't grind or anything, it's just blocked out!

But the transmission WILL go from 4th to 5th, but I have to put a lot of pressure on it and ease the clutch out in order for it not to pop out and grind. I have to push the shifter up against the stopper (pro-5.0 shifter) in order for ot to engage at all. And even at that it feels like it's barely grabbing.

Once it's in gear there is no problem.
Reply
Old May 13, 2009 | 09:24 AM
  #2  
calhoon's Avatar
TECH Fanatic
20 Year Member
iTrader: (6)
 
Joined: Oct 2002
Posts: 1,967
Likes: 4
From: Charlotte metro area
Default

The fork may be bent. Leaving the stop adjusted like that may cause a jump out. TA jump out can bend the fork even more. Thats another reason why stops are not a great idea.
Reply
Old May 13, 2009 | 10:22 AM
  #3  
thesource's Avatar
Banned
iTrader: (60)
 
Joined: Mar 2005
Posts: 2,693
Likes: 0
From: Adkins - Tx
Default

I've never seen a bent 5-6 fork. I've seen forks with broken pads and the steel part was damn near worn through from rubbing on the sleeve though.
Reply
Old May 13, 2009 | 10:34 AM
  #4  
ryanater's Avatar
Thread Starter
On The Tree
15 Year Member
iTrader: (2)
 
Joined: Apr 2007
Posts: 176
Likes: 0
Default

Originally Posted by calhoon
The fork may be bent. Leaving the stop adjusted like that may cause a jump out. TA jump out can bend the fork even more. Thats another reason why stops are not a great idea.
So what exactly is onvolved in replacing a shift fork? Or do I have to just rebuild the whole trans?

And aren't stoppers made to protect shift forks from getting bent?
Reply
Old May 13, 2009 | 11:47 AM
  #5  
calhoon's Avatar
TECH Fanatic
20 Year Member
iTrader: (6)
 
Joined: Oct 2002
Posts: 1,967
Likes: 4
From: Charlotte metro area
Default

The theory of a what a stop "fixes" is that you put SO much load on a stick shifting that when it slams in gear you damage a fork . The stop prevents an over travel and fork damage. This is simply not true. Most fork damage is caused by a clashshift. The load of the gear rejecting the fork is what damages it. Stops do nothing to stop this. The real thing is that the T56 uses a guide plate that prevents the rail/ forks from overtraveling.
5/6 forks are most commonly bent with a missed shift ( 5th instead of 3rd). It is a very common carnage for those who have looked alot of these.
Reply
Old May 13, 2009 | 01:00 PM
  #6  
thesource's Avatar
Banned
iTrader: (60)
 
Joined: Mar 2005
Posts: 2,693
Likes: 0
From: Adkins - Tx
Default

Hmmm, I always thought the stops were on the shifter and inside the unit to keep the unit from trying to over shift and pop the slider keys out on the back side of the slider as it slides too far.

Maybe I just haven't done enough of them yet?
Reply
Old May 13, 2009 | 01:25 PM
  #7  
calhoon's Avatar
TECH Fanatic
20 Year Member
iTrader: (6)
 
Joined: Oct 2002
Posts: 1,967
Likes: 4
From: Charlotte metro area
Default

Struts/ keys won't slide out unless there is already no wear gap and/ or the fork is already bent.
Reply
Old May 13, 2009 | 01:31 PM
  #8  
thesource's Avatar
Banned
iTrader: (60)
 
Joined: Mar 2005
Posts: 2,693
Likes: 0
From: Adkins - Tx
Default

Originally Posted by calhoon
Struts/ keys won't slide out unless there is already no wear gap and/ or the fork is already bent.
I would disagree with that statement but am not going to get into a pissing match with you on the subject.
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 May 13, 2009 | 05:25 PM
  #9  
ryanater's Avatar
Thread Starter
On The Tree
15 Year Member
iTrader: (2)
 
Joined: Apr 2007
Posts: 176
Likes: 0
Default

Ok so far I guess the best bet is that it is a bent fork? (sorry I don't know much about the inside of a maual) But how does that explain it being so hard to get into 5th from 4th?
Reply
Old May 23, 2009 | 09:03 PM
  #10  
silverbandit0996's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: May 2006
Posts: 564
Likes: 0
From: IN A VAN, DOWN BY THE RIVER!
Default

i have the same problem with mine. i always thought i had a shitted out syncro, but now i m pretty sure it's not.
Reply




All times are GMT -5. The time now is 12:05 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