D4 Noise

[dibble34]

How noisy are peoples D4's? Mine has always been a bit of a screamer at high speed and rattles a bit at slow speed. Looks to me like that central drive rods that go into the slipper have a bit of movement etc. Suspect it is all normal, just wondered. The only other 4wd cars at my track are belt driven so i have nothing to compare it to.

[jim76]

could be a bit of rattle in the driveshafts at slow speed if the car is a bit old and worn. Main thing to listen for is clicking/crunching under acceleration, that will mean you have stripped the crown gear in one of the gearboxes. Make sure the slipper is giving a bit under hard acceleration to protect the gears

[dibble34]

Cheers Jim, thats what i thought as the diffs are smooth. I shimmed the gears nice and tight so should have no crown issues, but thinking about it that may not help with noise i guess.

[rowanp25]

there may be where the problem lies..... try shimming the diffs so they feel free (the car should roll a good few feet when pushed but doesnt click if you holt the spur and try to turn a wheel) also use grease in the gear boxes and check the spur pinion mesh.

[dibble34]

I'll give that a go, in my old zx5 i was told to shim the diffs nice and tight as they were well known for stripping teeth. I shall crack it open and have a good look

[Capt Hilts]

I Bet its the pinion your using mate, they can make loads of noise on my D4, if I use an 18t it will be loud but if I put on the 17t it becomes a lot quieter, but this was with those RW pinions but now I use the Edit pinions as they are the same width as the spur and these are dead silent.
Try it and see - Rob.