Yokomo MR4TC-BD
#6228
Tech Apprentice
will have a look and let u know later see if they are bent
sumits obviosly bent if the tweak is spot on etc and still does it just finding what it is. basically with the slightest bit of throttle round a right bend it 180's. and it aint me i aint winning 3 local championships for note.
3 degree toein both sides on rear on the dot so if it is sumit bent cant be on rear its got to be front.
diffs feel really smooth and dont slip.
just trying to sus it out now
sumits obviosly bent if the tweak is spot on etc and still does it just finding what it is. basically with the slightest bit of throttle round a right bend it 180's. and it aint me i aint winning 3 local championships for note.
3 degree toein both sides on rear on the dot so if it is sumit bent cant be on rear its got to be front.
diffs feel really smooth and dont slip.
just trying to sus it out now
#6230
Tech Apprentice
You say that the tweak is spot-on, but what is the difference between the shock collars left to right,front and rear? If they are more than 1.5mm out then there is tweak in the car somewhere and here is your problem.
Also I find the top shock mouting screws can bend easy.
Also I find the top shock mouting screws can bend easy.
#6231
Tech Apprentice
preload on shock is equal all round and shock screws are straight. thanks for the idea tho
#6233
I would strip the car to the bare kit peices.
Put the lower deck on a very flat surface and each time you add a part check to see if the chassis tweaks. if there is not tweak throughout the build then it HAS to be something to do with the drivetrain. Make sure your diff pulleys are shimmed correctly and not rubbing on the bulhead or shock tower. I once had it where i shimmed to pulley too tight and it did a similar thing. You can usually tell if it is too tight because it is a bitch to put the top half of the bulkhead over the plastic cams.
other than than, check all the driveshafts are working properly,check all bearings are working check wheels are not rubbing anywhere, you have take into account that if something is close to rubbing, when you go round a corner, things move with the weight transfer. Wheels move quite alot also.
Put the lower deck on a very flat surface and each time you add a part check to see if the chassis tweaks. if there is not tweak throughout the build then it HAS to be something to do with the drivetrain. Make sure your diff pulleys are shimmed correctly and not rubbing on the bulhead or shock tower. I once had it where i shimmed to pulley too tight and it did a similar thing. You can usually tell if it is too tight because it is a bitch to put the top half of the bulkhead over the plastic cams.
other than than, check all the driveshafts are working properly,check all bearings are working check wheels are not rubbing anywhere, you have take into account that if something is close to rubbing, when you go round a corner, things move with the weight transfer. Wheels move quite alot also.
#6234
Tech Apprentice
gonna have it apart again tonight check everythings moving free. it acts i suppose like it running 3 wheel drive out of the bends but cant see what it is. if i find ote ill let u all know ill end up buying new car at this rate
thanks a lot
thanks a lot
#6235
Im sorry I haven't read all your posts but maybe the problem isn't tweak at all. I once had a bearing(hub) that was bad and it only showed when I tightened down on the wheel nuts. They somehow caused it to bind up and make the car feel like it was 3 wheel drive.
#6237
Tech Apprentice
curently rebuilding it now. everthings on but the shocks and towers. pu the wishbones back on without moving droops screws and ones moved from 6 (checked before i rebuilt) to 9 so sumits moved but i dont know what. pins and cvds are fine
#6238
Tech Apprentice
well completley rebuild everything ive had cars ive raced at nationals had less time spent on them and i couldnt find nothing. tryit up at local club tommorow see if it cured hopefully it is. thanks for everyones help
#6240
Tech Elite
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Hinge pins
You probably already did this...but did you check the outer and inner hinge pins.
Actually roll them on a flat surface..
I've had the same problem before...i had to take the car apart a few times..to find it..
a few times the hinge pins
1x found the ball cup was pinching the ball stud.
1x used long cvds found they were binding against the diff keeping the car from having the correct roll.
You'll find the problem, it's probably something small.
Good luck
Actually roll them on a flat surface..
I've had the same problem before...i had to take the car apart a few times..to find it..
a few times the hinge pins
1x found the ball cup was pinching the ball stud.
1x used long cvds found they were binding against the diff keeping the car from having the correct roll.
You'll find the problem, it's probably something small.
Good luck