Ansmann X2C Pro Diff Trouble!

[Team mad rat!]

Hi guys, raced my X2C for the past 3-4 months problem free, just recently when applying full throttle the car makes an awful noise, I have stripped the gear box down and rebuilt the diff, how ever the noise is still there. I have the upgraded idler gears, kevlar diff gear and ceramic balls. Any tips?

[mattybucks]

Your diff is too loose, once rebuilt you also need to bed it in and re-adjust. I will find or write a guide for you.

[Hpi_guy]

Take the motor out and roll the car forwards and backwards to seek if there is a problem, check all the bearings and make none of them are bad and then try rubuilding the diff with new plates and balls, also check hub bearings and driveshafts, make sure nothing is rubbing

[mattybucks]

Originally Posted by Hpi_guy

Take the motor out and roll the car forwards and backwards

Or just take the pinion off

[jim76]

Also ensure the slipper is set correctly and not locked up. Holding both wheels down, you should be able to rotate the spur with a thumb, albeit it will be stiff.

Also check the diff is tight enough by holding one wheel down and the spur gear, then try and rotate the other wheel of the car. You should see the slipper plates spinning. If you don;t and the wheel is spinning then it means your diff is too loose.

Tighten the diff a quarter turn and try again.

[steve-thebabystore]

I had similar problems, under the Tamiya section Lee Martin did a diff setting guide which has worked wonders on my x4 diffs and he looks at 2wd cars as well

[richardj]

Here's a tip we use on Team C diffs.

Take the diff plates and with a piece of wet and dry covered in a light machine oil, carefully do figure of 8 movements whilst pressing down of the plate. The MUST be done on a flat surface ie. piece of glass. Do both side of the diff plate.

Clean plates with a degreaser (motor spray).

When refittting plates onto out drives secure with a small amount of super glue. Make sure you don't get glue on the face of the plate that the diff balls run on.

[metalmickey0]

Originally Posted by steve-thebabystore

I had similar problems, under the Tamiya section Lee Martin did a diff setting guide which has worked wonders on my x4 diffs and he looks at 2wd cars as well

Have you a link. As i`ve put mine in the other way around to the manual , hopefully to stop it undo-ing. My theory is , as you hit the throttle it will tighten and not loosen the diff screw. yet to try it out