Go Back   LS1TECH > CHASSIS, SUSPENSION, APPEARANCE > Manual Transmission
Sign in using an external account
Register Forgot Password?
Search

Manual Transmission
T56 | T5 | MN12 | Clutches | Hydraulics | Shifters
Sponsored by
McLeod Clutch

Difference between 02 formula and 04 GTO T56?

Reply
 
Thread Tools Search this Thread
Old 05-02-2012, 09:50 PM   #1
Teching In
Garage is empty, add now
 
Trader Rating: 2
Join Date: Oct 2011
Location: Gardendale,Al.
Posts: 42
Default Difference between 02 formula and 04 GTO T56?

I have a 02 formula with the T56 and a 04 GTO T56. The only difference between the 2 trans that I can see is the tail housing.
Could I swap out the tail housings from the formula trans to the GTO trans and use it in the formula?
johnjohn is offline   Reply With Quote
Old 05-03-2012, 06:53 AM   #2
TECH Junkie
Garage is empty, add now
 
redbird555's Avatar
 
Trader Rating: 9
Join Date: Mar 2009
Location: Pompano Beach FL
Posts: 3,386
Default

the bellhousings are different however you can use the gto bellhousing from a gto as long as you use a gto starter. the tail housing can stay you just need an fbdoy shifter and shifter cup and your good to go thats it.
__________________
1966 Mustang long tubes, true duals, holley 350,detroit locker, all original otherwise. Grandpa left it to me

2001 MRM firebird shorty headers, shaved lid, hotchkiss stb, 3.42 posi. SOLD
2002 Z28 M6, LS6 Swap 230/232 cam, Ported FAST 102/102, Z06 maf, Meziere EWP, ARH 1-7/8, Bassani TD's, Tune, Lid, SSRA, ATI 10%, Motive 3.90's, Tick M/C, MGW, 33lb Mcleod Twin Disk/Fidanza, CF driveshaft, Shorai Li Battery, UMI Roto LCA, Bmr K-member. 448hp/400tq
redbird555 is offline   Reply With Quote
Old 05-03-2012, 07:18 AM   #3
LS1Tech Sponsor
2006 Chevrolet Corvette
My Garage
 
Jeremy@RPMTransmissions's Avatar
 
Trader Rating: 11
Join Date: Sep 2010
Location: Anderson Indiana
Posts: 1,465
Default

The transmissions are externally very similar. Like redbird555 said, the shifter and shifter block. The starter area of the bell housing is smaller on the GTO. But if you have both the f-body and GTO T56 bell housing they will interchange.

Internally is where most of the differences are. The f-body T56 ratios are 2.66/1.77/1.30/1.00/.74/.50. The GTO T56 has a 2.97/2.07/1.43/1.0/.84/.63. The GTO also has triple cone synchros where as the f-body T56 has single cone synchros.
__________________
RPM Transmissions builds the worlds Quickest and Fastest 4L60e!!! And GM T56!!!!

Follow us on Facebook

www.rpmtransmissions.com
Home of the Worlds Fastest 4L60e, T56 and TR6060 Transmissions

1-800-406-1109
Jeremy@RPMTransmissions is online now   Reply With Quote
Old 05-03-2012, 09:25 AM   #4
Teching In
Garage is empty, add now
 
Trader Rating: 2
Join Date: Oct 2011
Location: Gardendale,Al.
Posts: 42
Default

Thanks. The only reasone I'm considering the swap is I had a vibration with the clutch pushed in and reving the motor. I pulled the trans out of my formula and tore it down and I could tell it was a fresh rebuild,so I didn't replace all bearings. The bearing on end of the counter shaft(5&6 gear)were it sits in the tailhousing was bad. I replaced it and the race,put it back end and two days later same thing. I have no idea what would be causing the problem.
johnjohn is offline   Reply With Quote
Old 05-03-2012, 09:31 AM   #5
LS1Tech Sponsor
2006 Chevrolet Corvette
My Garage
 
Jeremy@RPMTransmissions's Avatar
 
Trader Rating: 11
Join Date: Sep 2010
Location: Anderson Indiana
Posts: 1,465
Default

With the clutch disengauged nothing in the transmission is moving. I would start looking at your clutch/flywheel combo.
__________________
RPM Transmissions builds the worlds Quickest and Fastest 4L60e!!! And GM T56!!!!

Follow us on Facebook

www.rpmtransmissions.com
Home of the Worlds Fastest 4L60e, T56 and TR6060 Transmissions

1-800-406-1109
Jeremy@RPMTransmissions is online now   Reply With Quote
Old 05-03-2012, 09:31 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: T56 tailhousing spina74 Parts Wanted 0 05-04-2013 11:01 AM
Whats the difference between 04 GTO and 05 CTS-V T56? Turbo Mike Manual Transmission 5 09-12-2011 03:45 PM
Tail shaft seal / gasket questions. SSmoked1 Manual Transmission 14 04-22-2010 12:17 PM
Difference between a Formula and a trans am? Chubbz155 Special Edition Vehicles 14 07-13-2008 08:39 PM
difference between a trans am and a formula trans am thislswon Pontiac Firebird 1967-2002 42 05-19-2007 01:41 AM


Tags
04, bad, body, bushings, covette, difference, differences, diggerent, fit, gto, pictures, ratios, replacement, shifter, t56, trans, work


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



Join Ls1Tech

All times are GMT -5. The time now is 03:01 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details