FML. T-56 Input Shaft Question

gregrob · 09-13-2009, 02:49 AM

To make a loooong story very short.

Rebuilt my T-56 w all the goodies.

4th gear / input was included in that build because the original was damaged (rounded engagement dogs)

Bought most parts from thegearbox.org, and a few from D&D

Wrestled, fought, cussed, stabbed, dropped, stabbed, dropped, etc for the better part of 5 hrs.

Trans *WILL NOT* go all the way flush w the bell housing.

After eliminating everything else, and I mean everything: TOB, splines, pilot bearing, etc.

I have determined the only thing that could be causing my issue is the bastards sent me a fucking LS1 input shaft....

Which is approx 1.5" longer, right...

Sooooo my question is that being the case (and I'm pretty damn sure it is) can I do anything to just USE the longer shaft?

Alternative is tear it completely back apart, and rebuild w correct input.

What do I need, lsx bell hsg? Will my existing clutch work? What else?

I'm beat with this thing

MustangKilla · 09-13-2009, 04:08 AM

one thing i overlooked when trying to reinstall my t-56 was the clutch fork. it likes to sit right where the TOB is (close to the middle). Just wondering if you tried pulling it back first before sliding the input shaft in. I was under the impression that 93-02 t56's where are same and the names where changed to protect the innocent

gregrob · 09-13-2009, 02:57 PM

Def not the fork

waltsfastz · 09-13-2009, 03:47 PM

Damn that sux. The input shaft is the very last piece to come out. IDk though. are the splines on the LS1 and Lt1 diffrent? I thought they were but I could be wrong

edunegan · 09-13-2009, 05:20 PM

the shaft is longer on ls1 due to the mounting of the throw out bearing . not that ur loookin forward yo pullin it back apart but ur gonna have to if ur positive u have the wrong shaft

the_merv · 09-13-2009, 09:53 PM

The Splines are the same..how much of a difference is there? The LS1 Input Shaft isn't 1.5" longer, more like 1/2"..close to that.

I don't think that many of you here have torn down a T56.. the Input Shaft is VERY easily removed..

Here is what you need to do if that is your problem..

1. Remove the 11 Bolts in the Front Plate.

2. Remove the Input Shaft.

3. Get LT1 Input Shaft and install new Bearing on it.

4. Check Bearing Clearances/Preload and re-shim the new Input Shaft with the Mainshaft.

5. RTV Frontplate and re-install to spec.

6. Install in car and check.

gregrob · 09-14-2009, 12:26 AM

Holy crap! Really? Even my builder thought it had to come all the way apart.

It only looks like maybe 1/2-3/4 inch or so of mating together w the bellhsg.

Im gonna call thegearbox tomorrow and ask that they overnight me a new shaft if they sent the wrong one.

Thanks Merv!

the_merv · 09-14-2009, 12:33 AM

No prob man.

gregrob · 09-14-2009, 12:38 AM

On another note, whats the chances of me just chopping off the pilot shaft area on the end of the shaft?

That portion alone looks to be maybe 1/4 longer than my old one.

I could cut off the ~1/2" it needs and re-taper it if theres enough there???

the_merv · 09-14-2009, 12:48 AM

A Machine Shop may be able to machine it down if it's the longer one.

I found this so I could be wrong on the length that I said previously..

LT input length: 9-1/4"

LS input length: 10-5/8"

gregrob · 09-14-2009, 12:53 AM

So around 1.3" longer.

Dont know if there would be enough left over after chopping it down that much.

Even if I have to swap it tho, doesnt sound too bad.

fergymoto · 09-14-2009, 07:18 AM

Are you sure you have the clutch disc centered to the pilot bearing?

gregrob · 09-14-2009, 12:54 PM

Yes. 1,000,000,00,000,000% sure.

I called thegearbox today and confirmed. They DID send me an 010 input which is for lsx.

Sending out a new one today. They did make me pay the $27 difference in cost btw the two, which is reasonable I guess.

They are sending me a new front bearing with it which is cool cause its a PITA to pull off sometimes.

Should have her swapped out and installed this wknd.

AChotrod · 09-14-2009, 01:43 PM

Quote:

Originally Posted by fergymoto

Are you sure you have the clutch disc centered to the pilot bearing?

Try doing it with a twin disc clutch and no alignment tool!!

Thank god a finally found one that worked at a local parts store!!!

jmd · 09-14-2009, 02:12 PM

Quote:

Originally Posted by gregrob

On another note, whats the chances of me just chopping off the pilot shaft area on the end of the shaft?

That portion alone looks to be maybe 1/4 longer than my old one.

I could cut off the ~1/2" it needs and re-taper it if theres enough there???

Nope.

Good to hear you figured it out and they're taking care of you.

the_merv · 09-14-2009, 02:48 PM

Very good picture.

gregrob · 09-14-2009, 04:13 PM

Yep, just a tad too long... Lol