Did my 7.25 take a crap?

magnumdart said
So this car is in gear, brakes applied, running, driveshaft not turning, making noise, noise is not from trans but somewhere further back? Is this a good assessment? Baffling. I once let my Dart get so far out of tune that when it was idling in gear the tailpipe would pound on the floorboard.

It is baffling. I'm not above admitting that my ears might be deceiving me. I listened from in front of both rear wheels and it sounded the same. It is on a concrete driveway with walls nearby. Perhaps it is coming from further forward. Or perhaps there is a vibration starting further forward at the tranny and culminating in a noise further back.

Johnny Dart said
Why not just take the rear end cover off and give her a looksie ?

That was on my list but ran out of light :grin: Pulling the disintigrated tranny mount out of the crossmember took longer than anticipated.

caferacerx said
if the driveshaft is NOT turning, and the wheels are NOT turning
then the rear is not turning and CANT be making any noise

I would check for loose T/Q bolts, or cracked flex plate, to start

Sounds logical and reasonable to me, which is why I had doubts about the rear u-joint because it wasn't moving at the time of the noise.

johnnymac2k6 said
pulling the diff cover is going to tell the tale, i think you also need to see if it moves under its own power also...even pushing it in neutral w/o the car running should produce this mystery noise if its the carrier...or better yet put it in neutral, and then jack up the rear, spin the tires by hand (both forward with you and a buddy to simulate rolling down the road) and the noise should be easy to source...if its a u joint you can grab the driveshaft in park and it'll be excessively sloppy....anyways lucky for you ppl give those 7.25's away ( i know i have) so finding a new center section, or complete rear for free/cheap will be easy.

I will keep farting around with it and gathering more detailed info/symptoms.