Hello,
I have 2003 Dodge Dakota 4.7L with 270K miles...original automatic transmission and engine. On the highway, as long as I am accelerating gradually, it seems to shift fine and can get up to 75mph and probably higher. But it will slow down on a hill and I cannot get the car back up to speed to pass a semi for instance. I can no longer "punch it Chewie!" on the accelerator.
It does have a P0420 Catalyst System Low Efficiency and small evap leak codes. It does burn oil I believe as well.
Could it be the P0420 issue affecting the acceleration or is it possibly the transmission? I have owned it 19 years so sorta of hoping to use it safely for at least 1 more year or so.
Thanks for the videos and any help you can provide.
Brent
Is the engine racing when this happens (transmission slipping) or is the engine bogging down? When is the last time the transmission was serviced?
It gets loud initially think RPMs up maybe to 3k but then once I recognize its not "catching" I take my foot off of the accelerator to get the rpms back down to where I was not having an issue. Driving through the neighborhoods to work (I don't have to get on the interstate luckily) its fine. And actually I drove 2 hours each way (4 total) last night on the highway and for the most part it was ok just gradually accelerating.
I had a transmission leak that I had fixed during Covid so around 2021 I think. So new fluids but not sure much else was serviced (or what a full transmission service looks like)
It gets loud initially think RPMs up maybe to 3k but then once I recognize its not "catching" I take my foot off of the accelerator to get the rpms back down to where I was not having an issue.
If engine RPMs are increasing without a corresponding change in road speed then your transmission is slipping.
Ok thanks! Just wanted to be sure 🙂