Vibration in 5th Gear (5 Speed Manual Transmission)

[PhantomLord]

My W124 E220's 5 speed Manual gear box was recently overhauled, it shifts and runs pretty smooth. But after certain speed (say 80 KM/H) in 5th gear I can feel vibration on the floor of the car (sound's Burrr...), it gets worse with increased speed.

Vibration goes off if I remove my foot of throttle or I don't see it if I do same/more speed in 4th gear, can anyone please suggest what I should be looking into?

Thank you

 

[Rash0775]

When did you get your gearbox service done?
A lot of people think having full service history
Means its been serviced but no until you say
You want it done they won't even touch it
Get it done ASAP

 

[Rash0775]

Or check the engine bushes sometimes
That can make the car vibrate too

 

[Dieselman]

Probably the propshaft centre bearing if not just rear wheel balance.

 

[panason1c]

I don't see it if I do same/more speed in 4th gear, can anyone please suggest what I should be looking into?Thank you

I had the same thought as dieselman (prop) but if it was the prop it would vibrate in any gear (given the same road speed), same for rear wheel balance.

I would first check that the exhaust (which was probably removed during the re-con) isnt too close to the underside of the car and vibrating against it under certain drive/load conditions.

 

[Druk]

This thread is nearly 4yrs old. Does the OP still suffer this problem?

 

[panason1c]

lol, i didnt notice the date of the original post, i just followed on from today's posts.