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Driver rear wheel locked up - clunking noises?
I have questions about my 2008 F250 CC with 6.4L PSD. I believe these questions have to do with the transmission but maybe more specifically with the rear diff.
I drove it yesterday for about an hour, everything normal. I got it home and turned it off.
Today I warmed it up, put it into drive with the brake on; there was a slight delay and then a very rough shift into drive. I pressed gently on the accelerator and it was moving forward very slowly like the clutch wasn't fully engaged and the motor was revving weird.
I stopped, put it into park and it roughly went into park. I then put in back into drive and there was a loud clunk and it went into drive. I tried pulling ahead and it rolled about 16 inches and then the rear drivers side wheel locked up and forced me to an abrupt stop. I put the brake on and put it into park. The motor started acting weird, and the revs were going up and down so I shut it down.
I got out and made sure it was only the one wheel that locked (which is was), I checked the front hubs (they were not locked).
I started the truck again, everything normal. I put it into reverse - got a loud clunk. I pressed the accelerator and it went backwards normally. I put it in drive and the motor immediately started to sound like it was going to stall. I put the transmission in neutral and the truck rolled slowly forward (I was on an incline). Then the motor started acting funny again - the revs going up and down. Then I started to hear a whining sound, I got nervous and shut the truck off.
I went under the truck and checked the rear diff for leaking fluid and there is nothing leaking. The AT fluid is full, clean and smells good.
Pulled the rear diff. check plug and the fluid is exactly level with the plug.
The transmission fluid was changed about 10,000kms ago, the transmission shop told me that the old fluid looked good and the transmission seemed fine.
Not sure what to do, any advice is welcomed.