1991 Mustang Strange noise????

[roadrunner19va]

I have a 1991 mustang lx 5.0. It has developed a clunk noise every once and a while in the rear of the vehicle. I have checked the universal joints and they are tight. When I rock the car back and forth in park I can hear the noise every now and then. It also does it when I take off from a stop. It is a pretty audible clunk. I had my brother look underneath it when I rocked it back and forth in park. He said he sees the whole rear end shift forward and back. That does not seem right to me. I do not think it is supposed to do that. Let me know if anyone has had a similar problem with theirs. Also throw some stuff out their I should check. Please help. Thanks Travis

 

[jammer84_03]

same issue...about to replace bushings and lca's. i believe its the bushings

 

[BigHairyMonkey]

could be a torn torque box as well

 

[ttop88]

Bushings would be the first place to look. Don't forget to check your shocks.

 

[smallstang393]

make sure you pinion nut is tight also. I have seen where pinion races wear out also to cause a clunking sound

 

[jammer84_03]

i've replaced the shocks....still the same noise. changed rear ends....still the noise. the only thing i havent done is the bushings and check for cracks

 

[Red88 RICK]

Ya im getting the same noise cant figure it out i rebuilt my rear and it still does it. everytime i take off or shift from 1st to 2nd... im thinkin about doing a bushing kit. it comes and goes when it wants tho.