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4l80
Oct 11, 2023 15:30:11 GMT -5
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dreed121 likes this
Post by wfo1319 on Oct 11, 2023 15:30:11 GMT -5
Has anyone used a 4l80 behind a ls for derby use?
Have one out of a 4x4
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4l80
Oct 13, 2023 12:09:31 GMT -5
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Post by dreed121 on Oct 13, 2023 12:09:31 GMT -5
I sure did,this year I bought a 93’ model 4l80 from a motor home.it was behind a 454..had the bid parking brake on the back.I removed that and put a 2wd tailshaft on it.bolted the 400 yoke to it…put a 3000 btr stall in it from a 99ish 4l80.bought the 48-mod kit from transgo so it will have vacuum modulator instead of electric..I wired it up full manual at the plug,put 12v to it.and it worked flawlessly…making the th400 shifter work on it is a pain in the ass,took me a few days to get it figured out
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4l80
Oct 13, 2023 12:11:15 GMT -5
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Post by dreed121 on Oct 13, 2023 12:11:15 GMT -5
The 48-mod keeps it from running max line pressure all the time.it has about 50ish psi at idle,then max at WOT
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