bellhousing questions

**brad22486** · 02-10-2007, 04:07 PM

So i bought a t56 today and i dont know if it was for a lt1 or ls1. so how would i tell if its for an ls1. Please help...

**mrr23** · 02-10-2007, 05:58 PM

ls1 bellhousing is a full 360* with 8 bolt holes. the LT1 design will only have 6 bolt holes to bolt to the motor.

**9t8z28** · 02-11-2007, 09:35 AM

I am pretty sure the spline is different on the LS1 vs. LT1

**brad22486** · 02-11-2007, 12:08 PM

what do u mean the spline?

**9t8z28** · 02-11-2007, 12:18 PM

Sorry. The input shaft. Its either a different length or a different spline count. I can't remember, I am sure someone else will chim in.

**brad22486** · 02-11-2007, 01:03 PM

dang... i thought the only thing diff from lt1 to ls1 was the bellhousing. i hope it will work in my ls1.

**30thbird** · 02-13-2007, 04:28 AM

Input spline on an Fcar T56 has always been the same 26T. The LT1 & LS1 inputs differ in length by approx. an inch( LS1 is longer) . The easiest way to tell them is the LT1 has a mount for an external slaxe & uses a fork for the release system. The LS1 has a concentric slave and no fork.

**brad22486** · 02-13-2007, 01:55 PM

do u think u can get me some pics of what ur talkin about

**9t8z28** · 02-13-2007, 02:12 PM

I got this from Macks Transmissions
T56 Input, 31T 9-1/4" Chevrolet LT1 1993-97 1386-585-005

T56 Input Shaft T56 Input, 31T 10-3/4" Chevrolet LS11998-00 1386-585-010

The LS1 shaft is 1/2" longer

**brad22486** · 02-13-2007, 02:27 PM

can i use the shaft and yoke from my ls1 auto or do i need to get another?

**9t8z28** · 02-13-2007, 02:29 PM

Do you mean the driveshaft? Yes?

**brad22486** · 02-13-2007, 02:52 PM

can i use the yoke out of the auto tranny?

**9t8z28** · 02-13-2007, 02:54 PM

Originally Posted by brad22486

can i use the yoke out of the auto tranny?

You mean the input shaft?

**brad22486** · 02-13-2007, 03:06 PM

yea i guess

**9t8z28** · 02-13-2007, 03:19 PM

Originally Posted by brad22486

yea i guess

The input shaft is on the front of the transmission. The yoke is on the driveshaft, which you can reuse.

**brad22486** · 02-13-2007, 03:35 PM

so does that mean i cant use the tranny in my ls1 or do i need to get a cluth and pressure plate for an lt1. give me all the info u got or can u change the imput shaft.