LT1 T56 Transmission to LA 360 swap

Cuttyman9 said
Yeah, I should have clarified but that’s why I mentioned if first gear was the same because if they are you can mix and match the input to get the desired length so an LS1 input in an LT1 trans (so long as it’s not the two early ones with different gearsets)
the cobra input is short, the lt1 input is short too but longer than the cobra, the ls is longer yet and the viper is longer yet.
I’ve never seen an Aston Martin trans so I can’t speak to that and I’m hoping for measurements from the Dodge Challenger tr6060 soon

I’m converting my c6 vette t56 to work in my 99 f150, had I not had a cobra midplate id be using an lt1 midplate.

I’m converting a camaro tr6060 to be used in my 71 cutlass behind an Oldsmobile.

You cannot mix and match just the input shafts. The bearings on the midplate that the input shafts ride on are different sizes. They’re very close visually, but the LT1 shaft is about an 1/8 inch thinner in diameter than an LS. The LS bearing is also a bit thicker than the LT1. Even though both are 31 tooth gears. You have to match the input to the midplate. you cannot put the LS input in the LT1 midplate. And you cannot put the LT input in the LS midplate. Not and have the bearings be correct or with issues with the bearing retainers as well as the play on the shaft. You’re gonna do more damage trying to hodge podge it.

Yes, you can convert an LT1 t56 to have an LS1 input shaft or even a viper input(assuming you also upgrade the counter shaft and main shaft) but you have to use the corresponding midplate . Unless you do some custom matching

Furthermore you have to make darn sure the LT1 t56 is a 31 tooth t56. Some, mostly 1993s and early 1994s were 29 tooth and youd have swap the entire gear set to swap it. As well as the main and counter shafts. And that’s expensively done.

You also have to watch the spline counts between some of the Fords. Most shared the 26 spline inputs but some, especially those in gt500s in certain years contained a 27 spline, 31 tooth input.
Corvette t56 t56s are an entirely different animal with their built in transaxle and stupidly long out put.