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

T56 issue

Thread Tools
 
Search this Thread
 
Old Aug 25, 2009 | 11:07 PM
  #1  
SS1875's Avatar
Thread Starter
11 Second Club
iTrader: (34)
 
Joined: Feb 2005
Posts: 3,158
Likes: 0
From: Ft. Wayne, Indiana
Default T56 issue

I have a T56(Viper upgrade of internals) built by RPM Transmissions. recent install of Textralia OZ700 clutch, new 01-02 slave, new pilot bearing,master has drill mod, and newly changed fluid/bleed of the system.
Current issue is at higher RPM's running through the gears, 3rd gear is knotchy (sp?) and very hard to get into as well as going from 3rd to 4th.
My thought is a bad shift fork but find it hard to believe with the upgraded internals.Any ideas would be greatly appreciated
Reply
Old Aug 26, 2009 | 06:00 AM
  #2  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

What was installed during the upgrade? I've torn down a couple "built" viper-upgrade transmissions from well known vendors. All of them still had stock synchro keys and stock plastic fork pads. One only had 2K miles on it and had $1000 of damage from a broken plastic fork pad.
Reply
Old Aug 26, 2009 | 06:34 PM
  #3  
Gen414's Avatar
FormerVendor
iTrader: (38)
 
Joined: Nov 2008
Posts: 2,309
Likes: 0
From: Pearland, TX
Default

Originally Posted by SS1875
I have a T56(Viper upgrade of internals) built by RPM Transmissions. recent install of Textralia OZ700 clutch, new 01-02 slave, new pilot bearing,master has drill mod, and newly changed fluid/bleed of the system.
Current issue is at higher RPM's running through the gears, 3rd gear is knotchy (sp?) and very hard to get into as well as going from 3rd to 4th.
My thought is a bad shift fork but find it hard to believe with the upgraded internals.Any ideas would be greatly appreciated


well, it is also a possibilty that your stock MC is not sufficient with your clutch setup either (even with teh drill mod).

What I tell my customer to do is this, if trying to diagnose a tranny or hydraulic issue:


Go out, and do NOT speed shift the 1-2, just SLOWLY shift to 2nd Once you get in to 2nd, wait for a few seconds or so, then floor it, and grab 3rd hard.

Now, do NOT try for 4th, ok? Now, how did it go into 3rd? OK? or did it grind?

If OK, do it again and again, like 4 or 5 time. EACH time, you are letting the fluid get back into teh line (recovery) and that is why I want you to grab only 1 gear)
If after 4-5 times of this, and each time you are able to grab the gear with no problems, it is your MC that is causing this.

Same thing with 4th gear, SLOWLY get to 3rd gear, and then after a few seconds, floor it, and grab 4th hard. Again, do this 4-5 times, but EACH time, allow the MC time to recover.

Purpose is this:

The stock MC is weak, and does not push alot of fluid. So, when racing, you grab a gear, then a split second later, you are grabbing another, and so on. Well, if MC is weak, it will not allow you to do this. You are just pushing "air" at that point, so to speak.

If, it still grinds when you do the above procedure, then it is tranny related.
Reply




All times are GMT -5. The time now is 02:57 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