diff problem on lazer zx5

[rcstore]

Hello,

After one hour of driving with the lazer zx5 my rear diff pinions are totaly wrecked! My friend has also a zx5 and has the same problem but with front.
What is the reason that the pinions are wrecked so fast??

Greetings

[jim76]

main reasons

1- your slipper clutch is locked up tight

2- you need to move one of the shimms over to the over side of the diff to mesh the gears tighter.

re-shimm the diff, then properly adjust your slipper before you thrash the car.

[bert digler]

Originally Posted by jim76

main reasons

1- your slipper clutch is locked up tight

2- you need to move one of the shimms over to the over side of the diff to mesh the gears tighter.

re-shimm the diff, then properly adjust your slipper before you thrash the car.

you aint whacked the back end have you i found the boxes distort

[rcstore]

thx for the advies we will install some new pinions

[notlawnomis]

I was talking to Mike West at the interclub meeting and they have found that the diff casings seem to wear or open up, they fit new casings every now and then to alleviate the problem. Anyone else found this to work??

At the interclub I found that on braking after a fast stretch (end of straight) the diff/s were making a cracking noise, only place it was happening, reshimming seemed to resolve the problem.

[bert digler]

Originally Posted by notlawnomis

I was talking to Mike West at the interclub meeting and they have found that the diff casings seem to wear or open up, they fit new casings every now and then to alleviate the problem. Anyone else found this to work??

At the interclub I found that on braking after a fast stretch (end of straight) the diff/s were making a cracking noise, only place it was happening, reshimming seemed to resolve the problem.

mine are doing the same but a fiver for new boxes it aint the end of the world

[stefke]

Mine started to crack recently. After reading about a lot of ZX5 gears breaking, I already planned a replacement with AE gears when they go.

[KyoshoK]

Originally Posted by jim76

main reasons

1- your slipper clutch is locked up tight

2- you need to move one of the shimms over to the over side of the diff to mesh the gears tighter.

re-shimm the diff, then properly adjust your slipper before you thrash the car.

whats the best way to set the slipper correctly? i thought just do it "tight" and no slip?

[jim76]

err... no! very bad!
the slipper is designed to slip under first acceleration and on landing from large jumps. this absorbs the shock to the transmission, otherwise the diff gears take the full strain.

to set it, just put the car down and floor it for a few feet. the wheels will spin a lot. Loosen the slipper off a bit then try again. keep doing this until you here the slipper "whine" for the first couple of feet under acceleration, and you shouldn't have to much wheel spin.

[rcstore]

what are AE gears ? do you have some link of these gears?

[stefke]

Originally Posted by rcstore

what are AE gears ? do you have some link of these gears?

Gears from the Associated (AE = Associated Electric) TC3, TC4 or NTC3. I saw a dutch guy at the EFRA race who did this, and it works. The materials used by associated are a lot stronger. Use the diff gear and diff balls from the TC3 with Kyosho outdrives. The idler must be reamed a little to fit the Kyosho shaft. Then its a matter of shimming and spacing but it works.

[KyoshoK]

Originally Posted by jim76

err... no! very bad!
the slipper is designed to slip under first acceleration and on landing from large jumps. this absorbs the shock to the transmission, otherwise the diff gears take the full strain.

to set it, just put the car down and floor it for a few feet. the wheels will spin a lot. Loosen the slipper off a bit then try again. keep doing this until you here the slipper "whine" for the first couple of feet under acceleration, and you shouldn't have to much wheel spin.

the manual specifies 13.5mm from the nut (that holds the spring) to the end of the shaft, do u suggest a tighter or looser setting than this?

[bert digler]

Originally Posted by KyoshoK

the manual specifies 13.5mm from the nut (that holds the spring) to the end of the shaft, do u suggest a tighter or looser setting than this?

to be fair i run the same set of gears all year and only twated em after lamping the rear end at oswestry so i set me slipper to slip a bit before the diff
:eek:

[KyoshoK]

thanks for the help. i loosened the slipper nut right up. it made it so much easier to drive. and also went around all day without stripping a spur for once.