Jumps forward at stoplight

[Fuzzy Dice]

Like the title says, when I am in drive(and only in drive not park or neutral), the GTX has this little hiccup where it lurches/jumps forward a bit. Not too bad, but if i'm not first at a light or am close to a car i'm worried that I might end up accidentally kissing someone's bumper. I just had the main seal redone and the tranny was dropped. I'm thinking its a problem in the trans and not the engine itself but i'm not really sure at all. Any ideas or guidance gentlemen?

 

[Hemi Rebel]

What's rpm does it idle at? Where is your timing?

 

[67 coronet]

make sure trans is not over full.check in neutral when trans is warmed up.when was the last time you did a trans service?could be a fluid return problem,dirty fluid?

 

[Bruzilla]

I know this might seem obvious, but do you have big feet? I wear a size 16 shoe, and sometimes if I don't put my foot on the brake pedal just right, it catches the accelerator pedal and will cause the car to lurch like that.

 

[RustyRatRod]

Low fluid level would be my first suspect.

 

[tpodwdog]

size 16?..........................lurch?......................or Lurch

 

[shorty64]

I'm guessing yours is an automatic and the TV rod is not correctly adjusted if the lurch forward happens right after you come to a stop. It's a late/forced 2-1 downshift cuz the innards aren't operating at the right pressure signal.

My 2cents worth anyway.

Good luck with your troubleshooting.

 

[Meep-Meep]

size 16?..........................lurch?......................or Lurch

:eusa_clap::eusa_clap::eusa_clap::rolling::rolling::rolling:

 

[BeastlyBirdie]

If I read the question correctly, I think you mean waiting at a light the car starts to push forward...if so, and power brakes, not enough vacuum at idle. Or, too much cam for not enough stall.

 

[JacobEXE]

my friend has this problem in his truck. his is a phord so its expected, but his does it when he starts it even though its automatic

 

[D575]

I'm guessing yours is an automatic and the TV rod is not correctly adjusted if the lurch forward happens right after you come to a stop. It's a late/forced 2-1 downshift cuz the innards aren't operating at the right pressure signal.

My 2cents worth anyway.

Good luck with your troubleshooting.

That's what I was thinking, Sometimes When I'm at a light, my truck will shift down and lurch forward. If I cared about the truck, I would try to fix it . But I only drive it maybe once a week.