transmission shifting problem after Pac brake

[JFought]

I have an 06 mega auto. It has 60K milles. . transmission has been fine, puked on occasion. After pac e brake install I can't get the tow haul to engauge. I tried to flip the on off swich and no change. The shift patter right now seems to be in the middle of regular and tow haul in reguards to rpm and the shifts. the 2-3-4 hits a little harder than it used to in mild to hard acceleration.



Did i lose the tow haul? or is it the computer due to the e brake?

 

[JHenry]

If you bought the correct kit for your truck with the auto, it should all work. Take it back to the installer, or re-check your installation. PacBrake should have a tech support.

 

[Paddy McMahon]

any other mods to the transmission or valve body? Your brake likes to keep the torque converter locked up and unless you release the throttle which will unlock the t/c I am willing to bet that the transmission will not make a 4-3 downshift. With mine the truck won't allow the use of a tow haul downshift with the brake on, even if the brake is not presently engaged. Call the vendor of the pac brake unit and ask about this. I had outstanding customer service from Jelag and the men at Pacific clutch & brake.

 

[JFought]

okay i give them a call. it just seems weird for it to act different after the install

 

[jeffnvegas]

see my post. maybe there is an issue we both need to address with Pac Brake. i had mine installed by Camping World.

 

[wcjp]

Did they install the ground wire to the correct computer pin?