Hi guys, I've got a bmw 435i RWD 8AT with full bolt-ons and a Quaife LSD.
Recently i've noticed the car has been acting up on cold start (mostly).
When starting the car there is a noticeable rattle from the rear (i believe exhaust or some component in the lower rear)
When I keep the car in D there is no sound, but as soon as I put it into N/R there are rattles/vibrations again, sounding louder in Reverse.
(See Video)
When I drive away during cold start, 1st gear often requires 2500-3000 rpm to change to second, if I let go of the gas at higher rpm without the car changing into second the vibration can be heard like a "rRRrRRRrrR"
sound.
Also (sometimes) when I start the engine warm or cold there is a small bang (think crackle/pop).
Have any had something like this before or know's where I should start looking? I dont notice anything different when driving, the car goes great in other terms.