scott3392

I have a 75 just had the transmission rebult with a shift kit put in (400 turbo) when I put in reverse I hear a banging noise when I put in drive noise is still there but not as loud.When under way car drives fine no noise or vibrate.But I did notice when I put in gear the car squats & raises more with new trans.p.s. rear end is topped off with new fluid & 1/2 shafts fill tight.Thanks scott

DIP51

Check the bushing on the front of the differential. If it is cracked/worn, it will cause the banging.

scott3392

Thanks I was hopeing someone would say that,I'm gone 3 weeks at a time will be home Tues have new ones there now.I been it was not the rear end just started at once car has not been ragged

ENG40

Did you put additive in the rear end (if it's a posi) when you changed the fluid?

GTR1999

The banging at low idle could be the improvement to the TH400. I rebuilt my 400 and set it up to the street/strip mods. The added pressures cause a bang noise when I let the car slowly drive and shift in idle, like in a parking lot. Normal driving and it's fine. This may be your noise? Posi hammering will usually show up starting up from a corner, when the clutches won't slip enough and hammer. I can fix that too but you have to pull the posi case.

scott3392

I appreciate all your input & your time my 75 is a restore frame up (78 frame) wish I had talked to you guys a year ago Thanks again Scott