Backlash After Heavy Duty Clutch Install

[Hadouken]

Taking into account that very nice technical description I also do not see how changing a clutch can cause backlash. And maybe op is need of a different description.

Op is that what you are experiencing?

[GTSBoy]

I cant see how changing a clutch can effect backlash.

Well driveliine backlash is something that various of us complaiin about. Doesn't matter if it's real backlash in some spline or gear somewhere, or virtual backlash caused by the springs in the clutch centre beiing too soft (if that happens somehow)......it's still annoying.

[Sinista32]

I think you need to take it back. Especially when it was just put in

Things that could have gone wrong to give you that feeling

it was put in misaligned

put in on an angle

oil/grease on the wrong areas

splines been damaged

many shops and DIYérs don't take the necessary care when installing a new clutch

[XKLABA]

For all the theorists that have read and understood what backlash is should also know what it translates to as to the feeling of backlash from the drivers seat which is what OP it experiencing

How can a clutch change cause the feeling of backlash, simple actually, if the springs are to soft then when you put your foot on accelerator the spline will turn inside the clutch plate till the springs bind then it will transfer drive to the gearbox input shaft and same when your lift your foot off accelerator, the spline will turn inside the clutch plate until springs bind against the engine then engine will begin to slow drive down, which will give the exact same feeling from the drivers seat as driveline backlash

[Ben C34]

For all the theorists that have read and understood what backlash is should also know what it translates to as to the feeling of backlash from the drivers seat which is what OP it experiencing

How can a clutch change cause the feeling of backlash, simple actually, if the springs are to soft then when you put your foot on accelerator the spline will turn inside the clutch plate till the springs bind then it will transfer drive to the gearbox input shaft and same when your lift your foot off accelerator, the spline will turn inside the clutch plate until springs bind against the engine then engine will begin to slow drive down, which will give the exact same feeling from the drivers seat as driveline backlash

Excellent explanation, was just about to write the same thing.

Perhaps technically the use of the term backlash is incorrect, and referring to it as "slop" would help those caught up on the "only gears have backlash" train of thought.

[slowridn73]

My r32 GTR has the same situation you explained, stock clutch, stock drivetrain. I can force the movement but tapping and releasing the accelerator at low speeds, with the windows down I can hear movement at the rear and it sounds like the diff is pitching back and forward. I ordered some whiteline bushes, Ill let you know if that corrects of lessens the "backlash".

[GH05T]

i get that, its diff bush for me.

[XGTRX]

Thanks guys it all makes sense. I have also noticed and intermittent bang rear passenger side when going over bumps so will have to address that too. But XKLABA's explanation makes sense to me. So gearbox out again I suppose.