Speedo Calibration 730 VSS
Thread Starter
Junior Member
Joined: Oct 2006
Posts: 37
Likes: 0
From: CT
Car: 1992 Z28 Aniv. Edition
Engine: 5.3 L33 Turbo
Transmission: Tremec T56
Axle/Gears: 3.27 Borg 9Bolt
Speedo Calibration 730 VSS
I need to know how to tune my 730 ecm for a rear end gear swap, i currently have 3.27, i used to have 3.08. I am using a t-5 wc tranny I have no idea where to start. Thanks
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Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
First, do some searching on this subject as it has come up MANY TIMES!
But, to give you the quick Reader's Digest version, you cannot recalibrate the ECM for a simple rear gear change - you must do that through the speedo gears in the tranny.
There are "switches" where you can make a LARGE calibration change but it's like 2:1 or higher. It's more from when a person swaps from a T-5 (or 4L60) to a T-56, which has a massive change in the pulses/second. But it is not "fine enough" to handle a simple rear-gear ratio change.
Again, do a search as there is a TON of info on this.
But, to give you the quick Reader's Digest version, you cannot recalibrate the ECM for a simple rear gear change - you must do that through the speedo gears in the tranny.
There are "switches" where you can make a LARGE calibration change but it's like 2:1 or higher. It's more from when a person swaps from a T-5 (or 4L60) to a T-56, which has a massive change in the pulses/second. But it is not "fine enough" to handle a simple rear-gear ratio change.
Again, do a search as there is a TON of info on this.
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