zx5 rear diff stripping problems

[mjt73]

went racing today with my zx5 sp and stripped 2 rear diff bevel gears within about 5 laps after 1 st one went i changed both gears
anyone else had this problem or can help !!
will be appreciated ??

mark

[rociduro]

Originally Posted by mjt73

went racing today with my zx5 sp and stripped 2 rear diff bevel gears within about 5 laps after 1 st one went i changed both gears
anyone else had this problem or can help !!
will be appreciated ??

mark

You need to ensure the diffs are shimmed tight when you build them, no backlash in the bevel gear at all. If shimmed correctly, the diff will last for ages without any problems.

[aberscoob]

I am also having the same problem with the rear diffs strippin (twice now). i am using an RTR zx5 with a 5.5 turn BL motor in it. I was begining to think that maybe i just had too much power going through the transmission. I will have a go at shimming it up and post the results after this weekends racing.

is there an option to the standard rather plastic looking gearing for something a bit stronger???

cheers

Steve.

[Fabs]

Nope, they're just fine as long as you shim them right, mine lasted over a year and a half and only got changed as they showed signs of wear.

[aberscoob]

Fabs - wow quick reply! and i will shim the new ones up tight as you reccomend but can i ask what motor you run just so i have a comparison? my son also runs a zx5 but with a 10.5 and his one has been fine.


Cheers,

Steve.

[Fabs]

I shim the gears so that there is minimum play between them, they shouldn't any be tight spots at all.

I've ran a 5.5 until last autumn, but then I switched to a 45C lipo and couldn't handle the power so now I'm using a 6.5 and it's still plenty fast.