Transmission problem...I purchased a 2005 Ford Ranger XLT 3.0L RWD Automatic Transmission (bought it on January 2021)..have been restoring it back to life and running after its been sitting for a year. Starting last week, I've notice a change in my transmission...once I am accelerating, and hits 60mph, the rpm lowers little under 2,000rpm...as soon the rpm is little above 2,000rpm, its jerks, and it feels like that rough pavement on the side of the road as you drive on it (shakes..) I've put in around $2,500 parts in this truck!

What could this be?

Mileage is 125,700.

Is rebuilding the transmission worth it or what?? If it needs a new Transmission then I'll order a used one from one..I'm not giving up on this truck!

Thanks!

 

Did the OD OFF light ever flash?

That indicates an issue with transmission shifting and usually sets a code for why it flashed

If you turn OD OFF do you still get the "jerks"?

 

OD off light is solid and yes it is stil "jerking" while OD is off and on...

 

You really should get a flashing OD light if its a transmission issue

You could try lubing the Slip Joint on driveshaft, but long shot, usually that's a "clunk" noise when starting and stopping

May be torque converter locking and unlocking on its own, but would expect a "ratio code" or TCC code

It only happens around 60MPH, so above that it goes away?

If you have a downhill road near you you could try shifting to Neutral when jerking starts and see if you still feel it while coasting downhill at 60mph

 

Yes, it goes away above 60mph... honestly I also hear a whining noise when I accelerates..I know I do have a engine codes but somehow there's no check engine light, light works when I put it on "on" position..