reprograming for bigger tires?

[Ranch96]

Has anyone took their truck to the dealer to get it reflashed for bigger tires? Jody at DP suggested I do this to help with the shifting. He said they can do it for up to 35 inch tires. I called the dealer and they said they might be able to and quoted $75 to $195! Don't mind the $75 ....but $195!? Any experiences with this?

[MidwestOffroad]

watch ebay and pick up a SUperlift truspeed. it is a simple 4 wire install and you can adjust it if you ever go to larger tires, plus you can flip a switch and run stock or A second set of tires.

It also compensates for gear ratio changes.

it changes the impulses frrom the ABS sensor to adjust the timing and speedo so engine and tranny and abs all function properly.

new they run 190 and you can always remove it and the truck will go back to stock.

[CSIPSD]

Dealer can do it for about an hours shop time... Its not hard, they just dont do it that often... FYI the truespeed is a PIA to install and you can only ajust the size something like 5 times...

[MidwestOffroad]

the truspeed has no limit on times it can be used. and is a power and ground wire and you cut you abs wire and connect the truspeed inline with the wire. takea about 30 min to install . I even have a link that walks you threw it.

All dealer can do it, some choose not to and chage a hefty shop rate to do so. In my case i ran 38 inch tires and 40s and just took a flip of the switch to change between them. and when i sold my truck just remove teh truspeed and all is back to stock.

[MidwestOffroad]

he link

Superlift TruSpeed ratio converter

[Ranch96]

Thanks, I'll definately get one of those before I pay the dealer $195.

[MidwestOffroad]

the only real pain i guess is calibrating it.

If you have a GPS you can barrow it is pretty easy.

Just drive down the road and match the speed on the speedo to the GPS. if it is off you turn the screw 1/4 turn go about a mile and keep adjusting as needed.

you need to go about a mile as the GPS is usually a little slow to relay the speeds. so you need to give it a little time to catch up.

I just go on a back road with little traffic or get on the highway and set the cruise at 55-65 mph.

and i just keep the unit close enough to me to adjust or have a friend hany

[djsdiesel]

I had a buddy at the dealer do mine, it didn't take. I will be getting one of these to solve my problem.