HELP!!! Cruise Control Problems
Thread Starter
3rd Gear
Joined: Dec 2008
Posts: 3
Likes: 0
HELP!!! Cruise Control Problems
I just had some transmission work done on my vette. I needed a 3rd and 4th gear re-build. I go to get in it, after the re-build and i go to set cruise control and it tells me it was set at 65 and then nothing. The MPH drop and the cruise control disengages. Could this be because they forgot to pug something in or is it something bigger?
Last edited by marcovette; Dec 29, 2008 at 12:35 PM. Reason: looked better
Racer
Joined: Aug 2007
Posts: 401
Likes: 1
From: Ashburn, VA
Not sure if you're having the same problem I had or not but try this.
Just before you set your cruise control, lift up on the bottom of the brake pedal with the top of your left foot to see if the cruise holds when you set it.
Are you getting any shift "flare" or RPM "flare" when you roll into the gas? Like when you roll into it at cruising speed does your RPM go up slightly, then dump back down?
My cruise was acting funny and the torque converter was locking/unlocking intermittantly. I was getting the shift/rpm flares and cruise control would either not set or it would just turn off by itself. Turned out it was the brake switch on the brake pedal making the car think I was applying the brake.
My tranny went at 60K with 3rd and 4th gears gone too. I don't know if the brake switch causing the shifting issues to wear the tranny down or not. I re-adjusted the brake switch and all is good now.
Just before you set your cruise control, lift up on the bottom of the brake pedal with the top of your left foot to see if the cruise holds when you set it.
Are you getting any shift "flare" or RPM "flare" when you roll into the gas? Like when you roll into it at cruising speed does your RPM go up slightly, then dump back down?
My cruise was acting funny and the torque converter was locking/unlocking intermittantly. I was getting the shift/rpm flares and cruise control would either not set or it would just turn off by itself. Turned out it was the brake switch on the brake pedal making the car think I was applying the brake.
My tranny went at 60K with 3rd and 4th gears gone too. I don't know if the brake switch causing the shifting issues to wear the tranny down or not. I re-adjusted the brake switch and all is good now.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Your best bet is to make sure that the BRAKE SWITCH is functioning properly. There are TWO brake switches. One for the light and one for the Cruise/tranny switch. The cruise function is actualy controlled inside the TAC module. I would start at the Brake switch and then the clutch switch and then trouble shoot the signals going to the TAC Module.
BC
Thread Starter
3rd Gear
Joined: Dec 2008
Posts: 3
Likes: 0
Im not getting any flair in the the RPM's. Today I took out the vette and the cruise control worked the first time i set it, then no more after that. But thank you for the sujestions. I will try both of them and let you know my results.
Thanks,
Marcovette
Thanks,
Marcovette
