Lt1 4l60e 3.42 rear end SHIFT TABLES

[dave w]

And bluecat 3.42 tables are almost the same as original 3.23 :)

BlueCats is a very helpful tool intended for HP Tuners likely for OBD2 vehicles. Excel is helpful transposing the BlueCat shift tables for OBD1.

Often starting with a factory .bin file that has the 3.42 gear ratio is a good plan.

I use TunerCats for OBD2, not HP Tuners.

For an experiment, I changed the gear ratio of a 1996 Buick Roadmaster to 3.42 gears. TunerCats changed a total of 25 parameters. The .txt file of the changes is attached. Likely a factory .bin file with 3.42 gears will NOT require all 25 changes listed in the attached .txt file (assuming same tire size)

96 Roadmaster 01.jpg

96 Roadmaster 02.JPG

96 Roadmaster 03.JPG

96 Roadmaster 04.JPG