Loud squeak noise at high RPM

Hirschauer

Member
Joined
Jul 15, 2021
Messages
36
Location
Yucca Valley, CA
Noticed last week a loud squeaking noise between 3,000 - 4,000 rpm a moment before the gear shift.
Don't hear it always, but mostly when I go up a grade on a highway.

Can come from engine or transmission; while driving it is hard to locate.
Made a video of it in the hope that the squeak is audible, but listening to the video it is almost inaudible.

When the TJ is parked and I rev it up to 3-4k no squeak......

It is a 2005 with the 4.0 and automatic transmission.

Any idea what is wrong?
 
I’ve got a similar problem. Mine is squeaking starting at around 2.5k rpm’s but will stop squeaking once the engine warms up a little bit or is driven for several minutes.

It’s a 1997 2.5L with a manual transmission