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?

[DCM]

wheel bearings, suspension mounts if everything appears right, thats where I would start.

[stoff]

Your chassis is tweaked. Basically after your crash the chassis has bent, don't worry though you can sort it our pretty easily.

Loosen all the screws attaching the top deck to the chassis (you need all your electrics in inc. the battery). Then tighten them up ensuring that the chassis is perfectly flat. Get a friend to push down on the front bumper part of the chassis and the rear bumper part of the chassis while you tighten the screws. You need to tighten the screws in a cross directional action (like you would tighten the wheel nuts on a full size car). That should sort it. You may need to redo the droop etc after.

[lucas-b4-b44]

So a tweaked chassis could really make that much difference making the car turn like that?

Well I better start putting it back together, I took every item off

Thanks for input will put it back together and do as you say, cheers for that.

[DCM]

if you are ever concerened that you got tweak, take your wheels off, disconnect the shocks, and sit the chassis on a flat table, and see how flat it is.

[lochness42]

Yeh tweaked chassis can screw up car handling

[discostu]

Originally Posted by 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?

have you run the car since you striped it down after the bad handerling night its un likley to be a tweaked chassis if it has only accured after a rebuild what it would more likly be a accentric diff holder being in a differnt possition left to right maybe on front or rear.

stu rand

[bodgit]

You have stripped and checked the car but have you checked the wheels and tyres.

[Garry]

And all the angles, like camber, toe, shock length, droop, ARB mounting link length etc.

A TC has a minefield of things that muck up the handling, but crabbing? That sounds like something alloy is bent.

[AndrewCaunt]

I would say its one of drive shaft pins sheard off or fell out.They are prone to that

[lucas-b4-b44]

I took everything apart same as before build, I cleaned everything and measured everything for dents, straightness, bends etc.... everything seems perfect. Chassis was completely flat.....

Rebuilt car....

Popped on "Hudy Professional All-in-One Set Up Solution" and did every tweak test and balance test, camber, everything, all perfect after rebuild.

Don't have a big enough space to try properly seems to go straight now, wheels seem a bit wobbly (but carpet is bumpy so not reliable testing in house) however will drive it in a gym hall on weekend.

[bodgit]

Check that the tyres are still glued on properly. You wont see it when static but when they spin up the tyre will deform and may be the cause.

[D34no]

check for buckled wheel and worn spool outdrives. it tends to be worn spool outdrives on the xray.

[lucas-b4-b44]

hmmm, very odd fixed it's self ??? after rebuild.... no worries it seems.

[stoff]

Probably something binding that's freed itself up.