slight knock when lifting off
 

i have a slight knock when lifting off the gas pedal,

if im take the car to high revs/harsh acceleration and lift off this is when it happens,seems to be coming from underneath,its not rear shocks as they are brand new

during slow acceleration/driving its doesnt really happen (maybe once or twice)

its a blob sti with a 6 paddle clutch/lightweight flywheel

its almost as though something is settling back into place,the car goes in and out of gear without issue from cold or hot

bush/mount related perhaps?

the car is coming up to 97k

cheers

It's the bottom end mate. :D

should have bought an sti...................................

Is it coming from the rear diff?

its hard to tell to be honest,its like as you surge forward then lift off something goes back slightly

Check the bolts & bushings in the pitch mount between g/box and firewall, and the other engine mounts for that matter.

will get them looked at,thanks

Do you have a brake stopper fitted ?

hi

no not at present but its something i will be fitting in the future

Sounds engine mount related

will get them looked at aswell,im guessing that at over 10 years old and 97k the mounts/bushes wont be in the best condition

anybody know which are a decent replacement and where to get items like this from?

cheers

Group n mounts and beatrush pitch mount or hard race.
They sell group n at icp.

ive seen the perrin pitch mount for £90 so will look at others

cheers

Yeah Perrins ok too, but if you want the best then http://www.rallysportdirect.com/Beat...2-2011-WRX-STI

its more likely the rear diff support, we sell loads to sort...........

What's the cause Alyn, breakage, loose bolts, wear & tear?

I have something similar,if I give it some beans on lifting off I get a knocking underneath.If I drive like Miss Daisy nothing. It has been on a ramp but couldn't find anything loose. I might suggest rear diff support when it goes in for MOT in May.

worn bushes in the T-bar

Diff?

Seen this?

https://www.scoobynet.com/scoobynet-...f-the-gas.html

I will get Ryan to investigate

What was the outcome of this problem,did you get it sorted?

Shreksta did you manage to cure this ?

sorry matey,my diff bushes are shot so gonna try changing them 1st

ok.Mine is in for MoT in May so the noise will be investigated further I will let you know if it gets sorted.

I had this on my blobeye when I throttled on and off fast it sounded a little like slack in the diff. Eventually I found the problem was the rear drive shaft nuts weren't torqued up properly. They seem to have a habit of going off torque after a few launches apparently.

What this man said, I had the same and it was the axle nuts. I re-torqued them once and it started doing it again after 6 months so bought new ones. All is god now :thumb:

all sorted now thanks to a new diff tie bar and group n sti bushes from rcm,will put part numbers on 2moro for all those interested

my noise was the upipe knocking against the transmission tunnel.
The diff tie bar is on my to do list.

i will let you know the part numbers 2moro matey

why was the up-pipe knocking?