T56 Swap

OK so it's not an LT1 but it's an LT1 tranny. So As some of you might remember I became a member of this site a few months ago, and I posted about doing a T56 swap into a 1997 Suburban. Well, I started tonight, I got the 4lcrapyE out and I will be installing the tranny tomorrow. I already have the clutch pedal and master cylinder in, so the rest is easy. I will be updating everyone as it progresses. But as long as I don't run into any major speed bumps tomorrow, I should be driving it by tomorrow night. I have tons and TONS of PICS of the entire swap. I will be starting up a website very soon, and I will post them all there. Thats it for now, more to come tomorrow.

Hey glad you finally got around to doing your project! I'm interested to find out how it works out.

It's in, and it lugs a little off the line do to the 3.73's. But once you get going, it HAULS! That tranny really woke it up, gets the power down quicker and it doesn't slip like a 4L60. Plus the gear ratios are awsome. The install went pretty smooth. Only ran into 3 major problems, but they were easy fixes. First problem was the starter had to be replaced with an LT1 starter do to the flywheel being smaller. It was easy, just costly. Second problem was the cross member, but it was an easy fix just required some fabricating. Third was a little bit harder, for some reason my stock yolk on the drive shaft has a small hole in it basically at the most inside part where the end of the tailshaft is. So since the T56 has an oil valley that runs through the center of the shaft it was leaking ATF out the hole. I don't know why the hole was there but it was easally fixed with a little welding. So the end product is exactly what I had hoped for. I just need to get the 4.56's installed soon, but it is a blast to drive. I will have more info and pics soon. I am working on setting up a website for all the info.

What master cylinder did you use? I second the 4.56's

I used a stock master form a 90 Fullsize pickup with a 5 speed. And that is where I got the pedal from too.

mrplow....have you happened to swap your pedals yet??

Did you get a Tremec T-56 or just a normal T-56?

What did you do for your shifter?

Since the shifter comes out of the tailshaft that would seem like the shifter would be too far back once you try to put it into the cab of the truck.

the T-56s from the LT1 are usually made by Borg-Warner.

I do know that but I was told that you can get what is called a Tremec T-56 that has 9 different shifter locations.

I just wondered how mrplow mounted his shifter and where it is located inside the cab.

I would also like to know where the shifter was located as well. Is it true that the tremec T-56 can come with 9 different shifter locations? I am planning on an LT1 or LS1 plus a T-56 swap in my 95 automatic as well. The drive shaft linked right up!?!?


-Mike

When I did my LT1/T-56 swap I had to shorten my driveshaft 1.5 inches. I got it done for $94 which included shotening, 2 u-joints installed, balanced, blasted, and painted!

As far as the shifter position it really isn't bad. If I wanted to I guess I could cut and weld in a little kicker to move it over about 2 inches to the left.

Get a truck 5-speed pedals and master cylinder. I had to make a brass adapter to adapt the funky hydraulic fitting on the slave cylinder line to connect to the truck master cylinder. I now that SLMDLS1 over on fullsizechevy.com didn't have this problem.

If you don't get a 6-speed wiring harness good luck on finding out how to use connectors for the vss, back up lamp switch, and reverse lockout selenoid.

I also had to move my crossmember back and make some knew bolt holes. I custom make a center counsel out of MDF and wrapped it in suede leather, you will definately need buckets. Get a T-56 tranny mount and I think that is it.

I am helping a friend put a four speed rock crusher in a 4runner. the shiffter is gonna have to be over 3 feet long. I want to see picks of the 6 speed location

Quote:

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Originally Posted by lsthunder

I am helping a friend put a four speed rock crusher in a 4runner. the shiffter is gonna have to be over 3 feet long. I want to see picks of the 6 speed location

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Good luck, considering this post is from 2004.

At least he used the search button

^Good point sir.

well today my tranny on my 99 4.8 sierra went and in hoping to do a t56 swap too so far i know there is no life left in my tranny i allready have 4.56s and a allburn posi my truck is flash tuned with 3rd stage afi intake and a couple other bolt ons but i need to fix tis problem soon so any addvice would be greatly apprecated