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How much gain will I see from T56 to 4L80 swap?

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Old 10-16-2009, 03:50 PM
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Default How much gain will I see from T56 to 4L80 swap?

Thinking about swapping out my T56 for a 4L80. My best et as of now is a 11.08@124mph...what can I expect for an et with an auto?
Old 10-16-2009, 05:12 PM
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Originally Posted by racejunky02
Thinking about swapping out my T56 for a 4L80. My best et as of now is a 11.08@124mph...what can I expect for an et with an auto?
I went from 12.6x to 11.6x when I went from a M6 to a 4L80 with a Yank SS4000. ymmv.
Old 10-16-2009, 05:18 PM
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Totally depends on your driving abilities.. What is your sixty foot?
Old 10-16-2009, 06:18 PM
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60 fts now are 1.6's
Old 10-16-2009, 07:28 PM
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Originally Posted by racejunky02
60 fts now are 1.6's
If you go for a good converter then I would expect 10.6-10.7

I don't know your setup enough to make a spot on guess, but that is close.. I am judging by the time in your sig.
Old 10-18-2009, 08:45 AM
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Come on guys I know more people have done this swap
Old 10-18-2009, 09:44 AM
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Im in the process right now of converting my 6spd into a turbo 400 tranny swap.Hope to see some big gains i run preety similat times to you.My car though is set up for nitrious.Eastside performance is doing my swap there in Conn if you need someone to do it for you.There a sposor in the eastern section.
Old 10-18-2009, 06:56 PM
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I took my M6 out and put in a 4L80 mvb and a circle-D multi disk 4400 stall , and love it.



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