Jeep Grand Cherokee sounds funky

My Jeep sounds like it is in low gear and engine sounds like its turning 4000rpm but only when cold. This is so noticeable that dogs stare and pedestrians run for cover. Once the engine and drivetrain warm up a little, all is normal. The reality is that the engine is only turning 2500rpm and it is shifting, but the tranny doesnt feel like its grabbing very well. After just a few minutes driving, all is well and there is plenty of power. Fluids are all topped off and fresh.
Is it time to warm this baby up and drive it to the nearest car lot?

“the engine is only turning 2500rpm”

At what speeds, and in which gears is it turning at 2500 RPMs?
If that is happening in 1st & 2nd gears when you are accelerating, there shouldn’t be any need for concern. On the other hand, if you are traveling on a level road at…let’s say…45 mph in top gear, then this is a problem.

What is the model year of your Jeep?
How many miles are on the odometer?
What can you tell us about the maintenance history of the transmission?

Also…is it possible that you are simply hearing a lot of exhaust noise, or are you sure that the transmission is the source of the problem? Under certain circumstances, a cracked exhaust manifold can produce lots of exhaust noise when the engine is still cold, but then the noise dies down as the manifold heats up and the crack closes up.

Year make and engine please?

Does your engine have a belt driven fan with a fan clutch?

In stead of driving it to the nearest car lot, why not drive it to the nearest reputable mechanic? Wouldn’t that make more sense?

+1 for mountainbike.

Sounds like leaking internal seals that swell when warm. Miles on the vehicle?