driveline lash + rear end gear setup

[Serpentor]

has anyone noticed a big improvement (reduction) in driveline lash and clunking after you get your rearend gears installed? it seems like they are set up with a pretty big backlash tolerance from the factory. If you've done a rear end swap, post your backlash settings (before and after if you got them) and whether or not you feel an improvement.

 

[hatsharpener]

I don't have numbers (before or after). Mine clunks less with the 4.56s than with the 3.27s, but, it does seem to clunk harder when it does clunk, if that makes sense.

 

[My Cobra]

I put my 4.10's in the slobra. The clunk was gone after i put them in i set the back lash at 5. I have not had a clunk since the gear install.

 

[Serpentor]

also, whats the factory backlash spec for our cars?

 

[My Cobra]

not too sure of the factory spec but mine was not set up right at all. would clunk all the time

 

[RoyWoods]

Factory spec (backlash between differential ring gear and pinion teeth) is: 0.008" - 0.013." The "Preferred Backlash" is 0.010." This is according to the Ford Factory Service Manual.

I have no idea what mine were originally, but my 4.30's are set up with 0.010" of backlash. That's as tight as he could get it and still have a good pattern. From what I've read I think you'd like to have between 0.006"-0.008."

 

[Serpentor]

I put my 4.10's in the slobra. The clunk was gone after i put them in i set the back lash at 5. I have not had a clunk since the gear install.

.005"?

 

[Serpentor]

ttt