Hello everyone,

I would like to know how much "slack" in the rear diff is normal (93 FD 5 speed). I have about 20 to 30 degrees with the driveshaft out - i.e. you can turn the front input of the diff 20 to 30 degrees before the wheels start to turn. Thanks.

Wade

 

I noticed the higher mileage diffs will have more play, but when driving I really couldn't feel the difference when I changed it out for a tighter one. I would just drive it and keep an eye out for a cheap low mileage used one for a later date.

 

Thanks for the reply. The slack is most noticeable when I am coasting down a hill, which I do to get to my house.

 

20 to 30 degrees is excessive, especially if both wheels are on the ground and you are turning the input shaft with the tires unable to spin freely.

You shouldn't notice anything on a downhill.

I wouldn't drive it if you can feel the gear lash gap with your hands on the steering wheel.

 

I don't understand what you mean when you say "you can feel the gear lash gap with your hands on the steering wheel". Can you explain.

thanks.

Wade

 

It's kind of a joke meaning you shouldn't be able to feel the gear lash from the drivers seat.. Or the steering wheel.. You should only feel it with your hand on the input shaft of the diff which technically is impossible while driving.

 

Something else to consider is bad axles can potentially cause this condition as well....

 

thanks. I will check out the axles.