Speedo Correction w/ TH400
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Joined: Jun 2004
Posts: 18
From: Lebanon, TN
Speedo Correction w/ TH400
I have a 97SS w/ TH400 and LT1 Edit and I can't get the speedo corrected enough. Edit will only let me go up to a 4.96 gear ratio and I'm still 20mph off. Any help would be great!
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Re: Speedo Correction w/ TH400
One thought....
Did you start with an M6 program (17 tooth/rev) in the PCM? If you did, and assuming your TH400 has a 40-tooth VSS wheel, you need to switch the PCM to an A4 program, to get the 40 tooth/rev setting.
Did you start with an M6 program (17 tooth/rev) in the PCM? If you did, and assuming your TH400 has a 40-tooth VSS wheel, you need to switch the PCM to an A4 program, to get the 40 tooth/rev setting.
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