Just bought this 2001 F250 Super Duty Diesel a few months ago (new to trucks and diesel), has a quiet squeak/groaning noise under front bench seat when going over bumps or starting out. Also, put new brakes on it, but when I stop, feels like the wheels stop first and then we sway backwards to a halt... I took it to Schwab's for the new brakes and they replaced some bushings they thought were the culprit, but nope... They seem a bit lost and I don't want to replace everything until it is fixed... HELP!!

Dragging our horse trailer 100 miles next week, would love to know it is safe!

 

Check your spring pins and shackels on the rear as well as u-bolts. Look at the motor mounts for wear as we ran into this on a fleet we were running a few years back. Also look for worn or loose body mounts. 2WD or 4WD?

 

4WD

 

My truck does that body movement too at stops and taking off. You said it wasn't the bushing, but my jeep used to do that. Sure it needed bushings, but the metal sleeve in the middle of the bushings where the bolt goes in was crunched and the more I tightened it the worse it actually got. So I bought new steel sleeves and problem fixed. This coming weekend I'm tearing my truck down to find my problem. So I'll check back and see if you had luck or not and let you know what my issue is.

 

Did some research and the movement when you take off and come to a stop might be axle wrap. Simple fix is traction bars. Happy shopping

 

was it the truck or you that was squeeking? old age sucks,