Difference between LT1 and lS1 T56

[albundy]

I am curious, what is different between an LT1 T56 and an LS1 T56 besides the input shaft. I have noticed that the LT1 T56 is a lot cheaper than the LS1 T56. by the end of this I am not going to have any other possessions besides my car!! I just want to tie the T56 to the back of a 5.3 and make it work!

[JoeliusZ28]

i was going to say input shaft but i never really looked past that.

From what I have seen, it seems LT1 trans hold up better to abuse but i think that is merely because the LS1 clutches slip easy and generate more heat.

subscribing.

[WMCCjames]

Bellhousing, clutch, input shaft and I think there is something else, faceplate maybe...it's been awhile since I looked at converting one.

[meissen]

LT1 T56 is a Borg Warner, LS1 T56 (or somewhere in there) they switched to Tremecs. Differences are Bell housing, clutch fork (LT1 is pull, LS1 is push), input shaft, and front plate. Internals are different, too, but if you have the 4 parts, you can swap from the LT1 to LS1 pretty easily. LT1 T56 also has an external slave whereas LS1 is internal.

Edit: Found it - Tremec's started around 99/2000, but it might still come with a Borg Warner label.

[s.reef]

and Brian comes through!

[JoeliusZ28]

LT1 T56 is a Borg Warner, LS1 T56 (or somewhere in there) they switched to Tremecs. Differences are Bell housing, clutch fork (LT1 is pull, LS1 is push), input shaft, and front plate. Internals are different, too, but if you have the 4 parts, you can swap from the LT1 to LS1 pretty easily. LT1 T56 also has an external slave whereas LS1 is internal.

Edit: Found it - Tremec's started around 99/2000, but it might still come with a Borg Warner label.

I thought Tremec was just a division of Borg Warner. Confirm/Deny?

[meissen]

Not entirely sure - from what I've read, LT1 T56 was produced by Borg Warner. The LS1 T56 was beginning at Borg Warner when Tremec bought the rights/assets off of them and started producing the T56 in late '99 / early 2000.

From Wikipedia, so take it for what it's worth:

As the four US manufacturers (GM, Ford, Chrysler, American Motors) planned to shift manufacturing to Mexico, it was decided that the industry would realistically be able to support only one manufacturer: regulations and tax concessions were made to allow TREMEC to be the sole source provider for manual transmissions in México. TREMEC contracted with the American automakers to supply car and truck transmissions. TREMEC licensed several model transmissions from Clark, Borg Warner, and New Process (including the A-833 Chrysler four-speed).

Transmission Technologies Corporation is a manufacturer of automobile transmissions, best known for their TREMEC line of manual transmissions. The company has a sales and marketing office in Farmington Hills, Michigan, and production facilities in Querétaro, Querétaro, and Knoxville, Tennessee. An additional engineering site is in Toledo, Ohio.
Some of the most famous TREMEC products were originally designed by Borg-Warner, including the widely-used T-56.

[9T8W66]

Both mine and my Fathers 1998 Formula's had Borg Warner's (BW insignia actually molded into case)
Mine was built in March his was built in May.
I have also heard the BW Units seem to be more robust as compared to the Tremec's. 130K on mine and the only thing to fail was the plastic cup that the shifter ball rides in at the end of the rail (found it when I changed the fluid).

[ThreeHonks]

I thought Tremec was just a division of Borg Warner. Confirm/Deny?

Correct Tremec is owned by Borg Warner

[meissen]

Correct Tremec is owned by Borg Warner

Not so much - if it is I can't find anywhere that says so. Everything I have found says that Tremec bought Borg Warner's manual transmission designs. From Tremec's own website:

Transmission Technologies Corporation (TTC) is part of the DESC group, one of Mexico's largest automotive component suppliers. DESC is traded on the Mexican Stock Exchange Index under the symbol DESC.

TTC is a joint venture between DESC's automotive operation and Dana Corporation, traded under the NYSE symbol DCN. With the acquisition of TREMEC in 1994, the acquisition of Borg Warner's manual transmission operation in 1997, and the relocation of Dana's medium- and heavy-duty transmission operation in 1998, the Transmission Division became a full service Tier 1 transmission manufacturer.

[WMCCjames]

I prefer Tremec myself...but that's only because they gave me a cool award and free stuff Oh and their Reps are really nice guys.

[ThreeHonks]

Im almost postive that Borg Warner is the owner of Tremec. Im having trouble finding anything that says either as proof, but Borg Waner was around before Tremec. Older Mustangs used to have a 5 speed manual by Borg Warner then the name was switched to the Tremec T-5, i believe in early 80's. I know that the T-56 is definatley a nice trans though!!

[ThreeHonks]

This is a tough one to figure out!! I have heard that Borg Warner is the designer of the transmissions and Tremec is responsible for assembly. My T-56 has Borg Warner stamped on it as did my T-5 in a Mustang I previously owned

[jakes_GSXR]

Dana Corp. reminds me of a bunch of preschoolers.

They'll be done soon anyways so who cares.

[meissen]

Im almost postive that Borg Warner is the owner of Tremec. Im having trouble finding anything that says either as proof, but Borg Waner was around before Tremec. Older Mustangs used to have a 5 speed manual by Borg Warner then the name was switched to the Tremec T-5, i believe in early 80's. I know that the T-56 is definatley a nice trans though!!

This is a tough one to figure out!! I have heard that Borg Warner is the designer of the transmissions and Tremec is responsible for assembly. My T-56 has Borg Warner stamped on it as did my T-5 in a Mustang I previously owned

Yeah, that's what I was saying though. Borg Warner designed the transmissions and then Tremec came along and bought the rights to Borg Warner's designs. Tremec now assembles the transmissions because they bought out Borg Warner. Again, if you were to go to Tremec's website they specifically state (what I quoted in post #10) that they acquired Borg Warner's manual transmission operations (rights and assets) in 1997.