T2 009 Crabbing to right!

[lucas-b4-b44]

After last weeks race (done after every race) I stripped down and cleaned as usual, checked shocks, diff position, bearings all clean and fine, left/right balance perfect.

However last night, I suddenly found my car crabbing to the right and it's instantly obvious..... Maybe a crash from last time, but I haven't had any big ones and I'm racing in a hall with a 13.5 turn motor running at max 60% throttle!!!

Cars handling is totally off, when left wheels are placed on a line and car is driven straight, it wobbles slightly and the back wheels move left over the line in a short distance (1m) and the front move right, however over a long distance (5m) it curves drastically to right: Moves as a crab.
When turning it's very unstable etc... too.

I've stripped the entire car and found nothing is damaged or bent as I thought could be the case.

Car is clean, spotless in perfect condition: diffs smooth, bearings smooth, shocks all the same, etc...

Any ideas....... as to where to start looking or identifying the problem?

Has anyone heard anything like this before?