bovi

iTrader: (5)

Is there any difference between LT1 t56 and LS1 t56? I need to buy a transmission for my LS6 and i've found one.

Will both be bolt-on or need any other parts?

Thanks
Kevin

ls1535i

no they wont interchange , the main shaft on the ls1 t56 is longer
u can buy a new main shaft to changeout for less that 200$

94LTZ

iTrader: (5)

Switch out to a LT1 bell housing and switch the input shafts.

Mike454SS

iTrader: (4)

The front plate of the transmission is also different, the LT1 style has an attachment for a pivot bolt for a clutch fork. The main shaft is the same, the input shaft is longer on the LS1 variant.

bovi

iTrader: (5)

Allright, Thanks guys!

ZONES89RS

iTrader: (25)

Would be too convenient to be able to swap the LT1 clutch setup into the LS and eliminate the sticking clutch issues of the internal hydraulic throw out bearing.

bovi

iTrader: (5)

Eheh, anyway i have 2-3 months to find one. (LS trans)

52 Rat

iTrader: (4)

I just completed this conversion. It was very easy and took about 20 minuets. I purchased a LS T56 front cover/midplate, input shaft with bearing, bellhousing and clutch kit. I had a NOS LT1 T56 trans. so the conversion was the best set for my application.

bovi

iTrader: (5)

Yah but the difference of price for me is not enough for buying all that parts and swsap everything. Its not like if i can have a lt1 t56 for much cheaper.

thesource

iTrader: (60)

Swap the input shaft and front plate to make it a Ls1 unit as long as the unit is not the 1st gen LT1 unit with the different gear ratio.

ZONES89RS

iTrader: (25)

Are you talking about the ZF 6 speed? That was the late TPI and early LT1 vettes and maybe the 93 camaro/firebird. The early T56 was not rated for 450 FTLBS till 94.

Mike454SS

iTrader: (4)

No, the 93 F-Body was not the ZF. There were 2 different T56's in the F-Body in 93, both of which were different than the 94+ unit. F-Bodies never got the ZF, and C4 vettes never got the T56.

ZONES89RS

iTrader: (25)

Good to know the vette had the junk trans. Not junky junk, but more expensive to fix and i have heard they are not as good as the T56. I could be wrong.

Mike454SS

iTrader: (4)

I honestly don't know anything about the ZF other than that it was in the LT1 and LT4 Vettes. I've never driven a C4 either so I have no idea how the ZF feels...which is strange considering all the cars I've driven, especially GM cars...

bovi

iTrader: (5)

We've got a pro here lol

ZONES89RS

iTrader: (25)

The ZF has a deeper 1st gear, like a 700R/4L60.

RStahoe99

What front plate are you referring to? any pics?

speedbikelvr

iTrader: (7)

Lt1 t-56 (Left) Ls1 t-56 (right) Do a search and you will find your answers

jmd

iTrader: (4)

The output is bigger; the synchros have multi-height teeth that allow for longer wear life, and there are no problems that need billet keys (this made it into the TR-6060.) If cost and parts availability were the same, I'd consider the ZF and I really like the T56.

The ratios are very close to the 2.66 / .50 T56.

If only everyone saw this post.

RStahoe99

ahh! Good pics, thanks for the visual. I did several searches and came up empty handed.