Originally Posted by
Taz
400ss ... when using a *.cax file (whether written by you personally, or someone else) one of the main quality assurance checks is your own brain.
When you opened the "B9103" parameter for the first time, if written correctly, it should have displayed "2wd". In the screen-shot you posted it displayed "<4>".
This should have immediately indicated to you that something was wrong / incorrect.
You got lucky this time. The parameter at 196B4 is the Reverse Lockout Speed (reverse inhibit with a manual transmission). It would have originally had a value of 1024 ($0400) which corresponds to a speed of 8 MPH. By applying the "2wd" button in B9103, you simply set this parameter to 0 MPH.
The new address supplied by Lextech (196E4) appears correct - although I have never tested this proposed change to a GTO OS in a running vehicle.
Regards,
Taz