Need help with trans swap info please.

[hifi875]

go to ls1tech.com and find a lt based t56. It may or may not work now that I think about it. they are less priced than a ls based, but you may need a bop adaptor. there are a lot more smarter people than me on here so im sure they will chime in.

[69*Goat]

28 views, and no one else has any ideas? Come on guys....

[INTMD8]

We just put a Magnum trans in a (70 I believe) Cutlass (with olds engine).

Used a McLeod BOP modular bellhousing (I think Quicktime makes one too).

I believe a regular 98-02 LS1 T56 would bolt up the same but then you have the added cost of modifying it for a mechanical speedo drive if you aren't using an electronic speedometer.

On the olds we had to have a custom pilot bushing made because the auto crankshafts are different than the manuals. Not sure if Pontiac is similar in this regard.

You will need to modify/rebuild your trans tunnel as well.

[69*Goat]

Originally Posted by INTMD8

We just put a Magnum trans in a (70 I believe) Cutlass (with olds engine).

Used a McLeod BOP modular bellhousing (I think Quicktime makes one too).

I believe a regular 98-02 LS1 T56 would bolt up the same but then you have the added cost of modifying it for a mechanical speedo drive if you aren't using an electronic speedometer.

On the olds we had to have a custom pilot bushing made because the auto crankshafts are different than the manuals. Not sure if Pontiac is similar in this regard.

You will need to modify/rebuild your trans tunnel as well.

Thanks, I'm not worried about the speedo, because I am running a Speed-Hut GPS speedo. I am running a stroked kit in my engine, so I bet the crank will go either way. I can get a bearing, I'm not worried about that.

[71 RAT]

Originally Posted by INTMD8

We just put a Magnum trans in a (70 I believe) Cutlass (with olds engine).

Used a McLeod BOP modular bellhousing (I think Quicktime makes one too).

I believe a regular 98-02 LS1 T56 would bolt up the same but then you have the added cost of modifying it for a mechanical speedo drive if you aren't using an electronic speedometer.

On the olds we had to have a custom pilot bushing made because the auto crankshafts are different than the manuals. Not sure if Pontiac is similar in this regard.

You will need to modify/rebuild your trans tunnel as well.

Just putting in a 2nd note about trans tunnel modifications. GM A Bodies have a small tunnel area. T56 is huge and doesn't taper down behind the bellhousing. The lower your car is, more surgery required. I'd love to do a t56 swap, I can't cut up my OE floors on my Chevelle. Yet!
Nice looking GTO and poncho powered. I'm huge A body fan!