I recently had to replace the transmission in my 2002 dodge dakota rt and now it will not stay running...it will not idle it dies every time. I can rev the motor up and even drive it and it will stay running...til i come to a stop and it has to idle. There is no problems with the motor or any other part under the hood or the rest of the truck at all. The transmission i put in it is a brand new dyno tested transmission...why will it not stay running on an idle? My fiance is a certified mechanic 55 years old and has done nothing but mechanic work his whole life and is very good at what he does...he has been trying to figure this out and been working on it every day for the last 2 weeks and hes boggled...this is the very first thing i have seen him not be able to fix or has even gotten stumped on...any suggestions or solutions? Any and all help is appreciated. Tia

 

replace the crankshaft position sensor. You banged it with the bellhousing when the trans was put on the dowel pins.

Been there, done that, was frustrated as F*ck until somebody told me to replace it.

 

We will definately take a look at that tomorrow. When you hit yours with the bellhouseing did your truck still run and drive and only die when idling? My new transmission slid right on in with no hesitation issues problems and without even causing so much as a deep breath while being put in. It went in easier than pouring completely melted butter onto a croissant or something. But we are definately checking it first thing in the morning...if not tonight!!!! Thank you soooooo much

 

yep, wouldn't idle, would die if put in reverse regardless of throttle. It boggled the living crap out of me - all I did was put a high-stall converter in it.