Hi all I'm part way through restoring my 99 gc8 and I have a back knocking that you can feel through the passenger foot well I have put new wishbones on new coilovers new rear bushes I did a gearbox a month or so ago and all the bolts are tight iv checked the gearbox mounts there all good so please if anyone has any ideas they would be greatly appreciated
tia

 

anti roll bar bush, drop link or ball joint/track rod end

 

Iv checked the lot and there is no play in any of it that's what's strange iv even bought new shafts and still going it

 

Could exhaust be hitting the floor?

 

Have you had a look at your prop shaft, check that isn't hitting the car because of a worn rubber bit. Can't think of the correct word lol

 

Doughnut .... not calling you that but is that what you mean , propshaft doughnut ?

 

Think you mean centre bearing.

 

My exhaust hits the rear subframe. Reason is its a newage subframe and the exhaust hanger is slightly too far over. Need to get it cut and moved at some point.

 

Not set up properly Or faulty/cheap nasty coil overs? (not saying urs are crap mate but could be real possibility?

 

I had some bc coilovers the top mounts had collapsed at the front , park the car and rock it if it’s suspension mounts or other issues you could probably hear it

 

On my classic wagon I had,it was the rear arb bushes.
they looked absolutely fine but once I'd changed them and re greased the new ones in the knocking went away.
I think if I'd just re greased the ones in there it would have stopped but I'd already bought new ones.
worth a try.
they were yellow whiteline ones.
Cheers. Justin

 

Not sure if thats what its called lol

Thats it mate lol

 

sorry i just wanted to say doughnut .... doughnut ... damn done it again lol

 

Lol understand the logic but couldn't think of the term. Get yourself down to Krispy Kreme