I may have a rare Formula, please help.

[Injuneer]

The clutch fork pivot ball (actually a "t" bolt) is mounted on the front of the tranny. The slave cylinder is mounted on an aluminum cup, on the bellhousing, right next to the tranny, facing forward. When you push on the pedal, the slave cylinder pushes the outer end of the clutch fork forward, meaning the inside end of the fork "pulls back" on the T/O bearing to release the clutch.

LT1 T56:



The T56 used in the LS1 cars was changed. There is no fork. There is a hydraulic slave cylinder mounted on the front of the tranny, concentric with the input shaft. When you step on the clutch, the slave cylinder "pushes" forward on the T/O bearing to release the clutch.

You can't really compare a Corvette tranny... they didn't use the T56 with the C4 LT1's, and the T56 in the C5 LS1's is mounted on the rear differential housing.

[crazilyconfused]

Oh ok....that's exactly what I meant. The way you worded it, it sounded like you were saying the actuator pulls the fork, which it doesn't. It pushes the fork and pulls the throwout. Just wanted to make sure my knowledge was up to date. Thanks

[DarkEnhancement]

Is the LS-1 T-56, stronger than the LT-1 T-56?

A swap can still be done, just the bellhousings are different, correct...? The bellhousing bolt pattens should be the same as any SBC, or BBC, "and V6's" just the LS-1 bellhousings are different due to the T/O and fork?

[Squat13]

didnt thay used some kind of ZF 6-speed in early C4 and a 4+3 Borg Warner in the later ones

[Injuneer]

The "4+3" tranny was built by Doug Nash, and featured an electronic O/D to give it 7 gear ratios. O/D could not be engaged with 1st gear, but could be engaged in 2, 3, and 4. Doug Nash had bought the rights from Warner for the B-W T10 4-speed, strengthened the case, and added the electronic O/D tranny as a seperate unit bolted on the back of the T10. It was used in the 1984 - 1988 models. It wasn't much of a trans.



The German-made ZF (Zahnradfabrik Friedrichshafen) 6-speed was introduced in 1989, and stayed in the car until the last C4 was built in 1996. The gear ratios were virtually identical to the ones used in the 4th Gen F-Body T56, and it had the same unwanted "skip-shift" feature, except is was called CAGS.

[Rob B (shoebox)]

Is the LS-1 T-56, stronger than the LT-1 T-56?

A swap can still be done, just the bellhousings are different, correct...? The bellhousing bolt pattens should be the same as any SBC, or BBC, "and V6's" just the LS-1 bellhousings are different due to the T/O and fork?

I believe the bolt pattern on the back of the LS1 block it totally different than the earlier SBC type.

[Squat13]

I believe the bolt pattern on the back of the LS1 block it totally different than the earlier SBC type.

It dosent matter, the T56 uses a detachable bell housing (just like ever outher manual transmission) unlike the 4l60E (and most automatics built by chevy).
Im sure that you can get the LS1 tranny to work on a Lt1, I just might be a little expensive. There are many differences, but if a SBC can be dropped in a fiero, or a 2.3L FORD bolts to a VW Transaxle, Im sure that some how a LS1 T56 will bolt to a LT1.

[gafirefool]

I just saw a guy on cardomain.com that has the red interior.He has got a 95 white T/A. http://www.cardomain.com/memberpage/333603. Maybe you two should talk...

[TraceZ]

It dosent matter, the T56 uses a detachable bell housing (just like ever outher manual transmission) unlike the 4l60E (and most automatics built by chevy).
Im sure that you can get the LS1 tranny to work on a Lt1, I just might be a little expensive. There are many differences, but if a SBC can be dropped in a fiero, or a 2.3L FORD bolts to a VW Transaxle, Im sure that some how a LS1 T56 will bolt to a LT1.

You cannot use an LS1 T56 on a LT1. The length of the input shaft is different as well and the front face of the transmission. The LS1 has no pivot pin for the clutch fork.