This is a little difficult to explain but here goes. When I crank up my truck it seems as if it's trying to lunge forward. Of course it doesn't go anywhere because it's in park but it does rock forward pretty hard. I really notice it after it sets overnight and especially when the temps are in the 40's - low 50's.

Checked all the fluids and their all A-OK. I was thinking that it just may be the torque in the motor rocking the truck a bit but he!! it's stock for the most part. If it was torque we all would feel it so that doesn't seem logical. It doesn't do it after it's warmed up. Did a search and found nothing related. I have been trying to figure this out for about a month and I'm at a total loss. Any Ideas?

Thanks in advance,
Todd

 

That's normal.

Don't worry about it.

There have been several threads about this over the years but the terminology used is not always the same so it might not show up doing a search.

 

Thanks LTNBOLT! By the way nice web page. That fella talking about the spark plugs is freakin hilarious! Kinda sounds like my cousin...J/K.

 

Mine does it too at times.............not a problem, seems pretty common.JR

 

That's Boomhauer from King of The Hill.

Actually those cartoon characters are suppose to be from Texas.

 

I got it too...

 

Yup its normal. It happens to my truck every once and a while. If it happens a lot all I would do is press on the brake when starting or just have the e-brake on. Some where mentioning not barking within a few inches of anything as well.

 

MIne has done it since 3 miles were on it. It happens every start some are worse than others.

 

Mine does it all the time. It still does it even with my new FT 2600 stall converter.

 

Both my Lightnings did it the 02 was worse than the 03

 

Hi the reason the trucks do this is on start up with cold trans fluid is the fluid that is on the clutch pack friction discs is thicker than when hot and some of the rotating force of the turbine shaft from the converter is transfered through the trans and out to the rear end. this takes up any slack in the parking mech. and can cause the truck to roll until it is up against the parking paw in the trans. This usually only occurs when the truck is parked on a level surface if parked slightly dowh hill in the front you will never feel it because the weight of the truck is already resting on the parking paw hence no slack to take up

 

Mine does it too. I think it`s just anxious to go forward.

 

This is what I love about this board! I appreciate the explanation lightning5.4!