ABS problems with tires over 34"

[McRat]

Even if you calibrate the speedo for larger tires, the ABS does not know you've changed it, and it might throw ABS codes.

You need a Tech2. Plug in, select truck, go to chassis>abs>tire size:

Use 245/70-19.5 for 33" tires
245/75-19.5 for 34-35"
235/80-22.5 for 36-37"
9.0-22.5 for 38" and up.

Tires over 44"? Sucks to be you. No calibration that high. Reduce speedo correction until it works right.

 

[sweetdiesel]

interesting

ive never changed mine,however 3 friends constantly complain about this
ill let them know that this can be fixed

 

[McRat]

ttt

 

[Blackbird1877]

Tires over 44"? Sucks to be you..

:rofl::rofl::rofl::rofl::rofl::rofl::rofl::rofl:

 

[WSUcowboy]

I have never had a problem and I run true 35" tires.... ?

 

[McRat]

35" is the grey area, some trucks code, some don't, when you put in the perfect speedo correction.

When I do speedo calibration for mail-order tunes, I put in a number I know doesn't code, regardless of what size they tell me their tires are.

This thread only applies to those with an ABS light that stays on after they adjusted their speedo for oversized tires, and only matters if they have access to a Tech2.