LT1-LT4 Modifications 1993-97 Gen II Small Block V8

th400 users and speedo?

Old 03-28-2013, 10:30 PM
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Default th400 users and speedo?

what do you guys do to make this work?

I have a 94 with a 6.0/th400 swap with ls1 pcm and ls1 front brakes if that matters.

I would like the stock speedo to work!

What needs to be done

Last edited by SPOOLED UP; 03-31-2013 at 09:24 AM.
Old 03-29-2013, 05:11 AM
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You can wire it into one of the front abs sensors, just need to do some programming.
Old 03-29-2013, 06:32 PM
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Check out Jagsthatrun. Com.. They have a kit to connect to stock speedo.
Old 03-31-2013, 09:23 AM
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I know the ls1 cars can do this but im not sure about the obd1 cars.
Old 03-31-2013, 09:27 AM
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here you go here is the answer. you can put a sensor in the tail shaft housing of the th400 or th350. i have mine in a TH400 but t ran about 100 bucks for everything if i remember than u have to have a shop press the regular wheel on the output shaft on the tranny. but it will work with the lt1 ecu and stock cluster. i ran it like that for 2 or 3 years but you have to get the the speedo recalibrated. but now im going t be running all new auto meter gauges and it will work on that too.


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