Noise rear of mark viiisounds like exhaust hitting but its notand its not torque converter shudderheard in rh rearat low speedslight load on enginedont matter what gear trans is inrpm 1100-1400?

I don't know if this will help, but If your getting banging in the rear end of your Mark VIII. It is probably the rear shock mounts, it would be a good idea to replace the shocks as well. You can use the Sensa-shocks from a 1997 Ford Thunderbird, but I would recommend getting the actual shocks from strutmasters.com. They are about $39.00 a piece, plus $20.00 per shock mount kit. They ship to most places within 3 days, also.