im having a knocking noise accompanied by vibration/shaking while the car is in gear only during acceleration. when i hold the clutch in or put the car in neutral the shaking and noise stops...i just did a tranny flush about 5 mins ago with synchromesh friction modified...any ideas what could be wrong? do i need a new tranny?

mods:
dc2 chasis
b18c1
81.5mm itr pistons
ctr cams
aem cai
greddy sp2
exedy street clutch

any help suggestions would be appreciated

 

What did your fluid look like? How much metal on the magnet?

One of the bearings is done.

 

diff bearing OR an axle.

 

I felt that vibration before under acceleration when one of the bearing that goes on the driveshaft is broken or gone bad, three of them are in the cup that inserts into either end of the gearbox. This is with a 2000 Integra not sure how it is with others.

 

Having a very similar problem with my tranny. Just did somewhat of a tranny rebuild. Now it makes noise under acceleration from 3rd gear on.

Use the clutch or take my foot off the gas it stops and sounds normal.

 

tranny fluid looked really dark...didnt really notice any metal. and the axles are also brand new. thanks for the replies guys....do i need a new tranny or can i just get new bearings?

 

Sounds like an axle problem. My friend just had this same problem with his car, the nuckles in the axle are getting binded up and causing it to get stuck so its popping and vibrating. Even if your axles are new it can still happen, check em out before you go out and buy a tranny

 

^this is especially true if you bought the chinese garbage they sell at the parts stores. was the problem there before the brand new axles?

 

I have been in a B18C5 swapped EK hatch where one of the inner axle joints was binding up. It would nearly shake the car off the road.

In that particular car the axles were also fairly new.

 

Many aftermarket axles will have vibration problems, I would try swapping in another set and see how it does.

 

if it was the axle, wouldnt it vibrate while the car is in neutral or coasting? the shaking is only while the car is in gear.

 

It depends, cause when the car is in neutral there isnt any load on them so its just spinning freely and the joints arent binding up.