3:73 TL, Mark Viii DS, F150 S-clip
I have a 95 4.6 t bird with a factory TL diff. This summer I added Richmond 3:73 gears, a 93 Mark Viii driveshaft, forced lube kit and the F150 S clip. Ever since then I've been chasing around a "thunk" from the rear of the car that you can hear and feel and I can't find it. It does it when you come to a stop and it downshifts into first or when I'm going thru a parking lot under light throttle. It's also started something else. When I turn a corner from a stop, it will make a louder rumble, kind of "slipping" noise from the rear. Maybe clutch noise? I've taken it to the shop where I had everything put in, he used to work at the Ford dealership and went solo, and he checked the backlash and inspected everything and said it was ok. I just replaced the front diff bushings with poly from SCP and replaced the rear diff mount bracket and no help. It's back at the shop again so the mechanic can drive it and see what it's doing. Has anyone else had these issues with these mods on their cars? If so, did you get it figured out? It's driving me nuts!