Rough Idle when shifting only??

[7.3Digger]

Hey guys,

This is my first time posting something on the forums. I have been very lucky with my 02 SD until recently. Maybe someone here can help.

When shifting from Drive to Reverse (auto trans), the RPMs go down quite a bit and sometimes the motor just dies. This only happened in that interval when I switch from reverse. When the truck is on a leveled road, it only idles down. If the truck is at an incline, the motor will definitely die.

Last week I had to make an abrupt stop to avoid a collision and the motor died too. I took the truck to the dealer to be diagnosed. They could not find the problem.

I am running a Banks Trans Command. I plan in removing it this weekend to see if that makes a difference.

If anyone here has experienced the same or similar issue, please provide some feedback.

Thanks

 

[JRJ04]

check your trans fluid level. if it is low, you will have those symptoms.

 

[rammertide07]

Sounds like a good place to start. Kinda sounds like the tc staying locked...like letting out on the clutch with not enough rpms up to keep from killing the engine.

 

[7.3Digger]

Now that you mention the trans fluid level, I remember the trans being serviced (replaced fluid) and shortly after that I started to notice the symptom. I will check that today. Thanks.....

 

[JRJ04]

yea, from the sounds of that...i can almost guarantee you that the fluid is low. when you refill the tranny...it takes a long time for the fluid to drain down in there giving the illusion that its full, when its really not.

 

[7.3Digger]

Well, you were right. I checked the fluid and it was low. I added one quart last night and the problem seemed to have gone away.

Thanks for the help.....

 

[JRJ04]

sweet! be sure and check that again after it settles down in there to make sure you dont need more.

 

[7.3Digger]

Will do.
Thanks again.....