vk maken weird noise

[duckR]

hey guys i got a vk 355stroker ibn her she maken a weird noise from under car it aint there all the time cums n gos its a weird knocken noise i noe it aint got anything to do with engine as i aint losing any power ,,,, its like a tapping noise n seems to be only while car is rolling or sitting at lights in gear now it cant be the gears that are ###d as i change tho gears n it still makes it but goes away after awhile ,,, was thinking may hav sumthing to do with tail shaft as if im driving down highway i get a thumping noise n slight vibe cuming from under car ........ ive jacked her up n took exchust off so ive played with tail shaft a bit i hold end that joins diff n twist end that joins gear box n i get a slight novement is this normal also the york in2 gear box slighty moves up n down n in and out ..... if sum1 could helpme with any idea wat this could be would be great thanx guys..... she has a trimatic gear box in case this helps

[ari666]

now. if you could just repeat all that in english...

[TY318]

sounds kinda like the mounts to either ur trans or the tail shaft hvae you checked them if not it could be the diff my dads ute he swaped his v6 for the 304 and left the standard diff in there and the diff was recently replaced because it had a bit of play with the tail shaft he put a LSD in and now its all fine the old diff was the high performance diff came out in most v6 commo's

[vk.jonno]

A weird noise coming from the driveline/under the car bur he doesn't think it's the engine.
Is the exhaust knocking on anything....?

[soop]

Gearbox mount.

[Cane_It]

^^^^^
wat he said, or tailshaft centre bearing, would def be looking at both of these with the extra power of a stroker.
check also to make sure that the exhaust hangers are bent back away from the tailshaft as there is one that can foul on the rear section of the tailshaft if it hasnt been bent back properly.
The third thing I'd check is to make sure the extractors arent fouling on anything, pacemakers (and prob other brand stoo) are a tight fit in early v8 commos and must be lined up spot on.

[soop]

I reckon if it was the tail shaft it would bang all the time or not at all when it was stopped. The engine would be rocking back and forth at idle causing the gearbox to knock on the buggered mount.

[Guzzoline addict]

Check the gearbox mount bolts (mount to crossmember) If someone has put to long of bolts in it will cause vibartions and knocking noises.The bolts sould be fairly short and if your gearbox mount is old ,it won't take much extra lenght for the bolts to hit.