I have an EVO 8 that has a few noises that I am trying to sort out before I bolt on some power. I am currently in Darwin and it is a major struggle to find someone that is familiar with EVO's or specialists with transmissions.

PROBLEM 1
When in neutral at idle there is a rattle from gearbox/clutch area.
Noise disappears when clutch is engaged (pushed in)
Dont notice rattle when driving, however this could be due to engine/exhaust noise.
Clutch is not standard, heavier duty however unsure as to what exactly (bought it with it in car already)
Noticed problem after service (Oil Change)

PROBLEM 2
In all gears (loudest in 1st and 2nd) there is a whine on acceleration and deceleration.
Whine increases and decreases in pitch with engine RPM.
Loudness doesnt seem to change.
Gearbox feels tight and haven't had any gear changing issues.

QUESTIONS
Does any know the probable cause of either problem and wether they are related or not?
Anyone experienced similar problem before, if so please shed some light.

I appreciate any advice/experience posted

Cheers

 

DO you know if you have a light weight fly wheel? could be flywheel chatter.

do you have a built trans or is it stock? Some of the built transmissions have a wine to them.

 

Yeah, it is going to be a little difficult to narrow the problem down until you either get a more up to date list of what was done to the car, or possibly even give a sound recording or video to help out. Some rebuilt transmissions can make a whine, but it could also be indicative of a problem if the transmission was untouched. Sorry for the vague and unhelpful answer, I just think more people could chime in and give personal experience with what parts you are using if you listed what parts you have and when they were installed, etc..

Good luck

 

TOB seems to be the issue.


could be TC or one of your belts are over tensioned (i have the same problem with my auxiliary/serpentine belt).

youtube has some videos on TC whine.