fastlt1

iTrader: (4)

I have a 93 Chevy 1500 2wd ext cab, 350 auto. It is a 4l60e. I was wanting to put 4.11 in it. How to recalibrate trans? Thanks

Rhino79

iTrader: (7)

Have to change the little gears in the tailhousing of the transmission.

fastlt1

iTrader: (4)

Where do you get the gears and how do you figure out which ones you need and can I do it myself? Thanks.

Rhino79

iTrader: (7)

Crap I just relized that you have a 93 model, that is the first year of the 4l60e in the trucks. You can get an electronic speedo calibrator from like summit or something.

foggy

iTrader: (1)

Here is what you need. Very easy to install.
http://www.ntwonline.com/acb/showdet...=1973&CATID=15

fastlt1

iTrader: (4)

Can it not be changed in the chip?

hrodgmc

iTrader: (2)

There's a local guy doing a drac module service for $20 dollars shipped. You can ship him your old one after you get the adjusted one. This link shows you basically what's done.
http://www.philter.com/cgi-bin/drac.pl

If you can solder you can do it for cheap. Use this
http://www.cascadesurplus.com/catalo...oducts_id/1107
and the tire sizes are almost limitless.