n00b problem with MadRat slipper clutch

[Spiff500]

Hi All,

I've just built up a MadRat kit after *years* of being away from RC.

Overall, it's a great kit, with some really nice touches . . .

Anyway, the build went well, no problems. Took it out for a test drive; the only thing that seems wrong is that the slipper clutch is way too loose - or slipping quite dramatically.

I've read somewhere that the car should wheelie just a little, then back off the clutch a tiny bit.

Ok - my problem (and apologies if this seems really dumb!) - how do I tighten the clutch?

Everytime I try and tighten it - either the wheels turn, or the pinion or the motor. At no point do I seem able to tighten the nut on the spindle behind the spring!

So, I took the motor out, released the motor cover and using various braces (screwdrivers, metal rulers etc.) braced everything related to the gearbox and diff. Even so, now the grey round metal plate just behind the spring on the shaft rotates!!!!!

So, how the hell do I manage to tighten the nut and by association tighten the clutch!

I apologise if this is a bit of a n00b question - but it's really starting to p**s me off now

[Battle_axe]

Originally Posted by Spiff500

Hi All,

I've just built up a MadRat kit after *years* of being away from RC.

Overall, it's a great kit, with some really nice touches . . .

Anyway, the build went well, no problems. Took it out for a test drive; the only thing that seems wrong is that the slipper clutch is way too loose - or slipping quite dramatically.

I've read somewhere that the car should wheelie just a little, then back off the clutch a tiny bit.

Ok - my problem (and apologies if this seems really dumb!) - how do I tighten the clutch?

Everytime I try and tighten it - either the wheels turn, or the pinion or the motor. At no point do I seem able to tighten the nut on the spindle behind the spring!

So, I took the motor out, released the motor cover and using various braces (screwdrivers, metal rulers etc.) braced everything related to the gearbox and diff. Even so, now the grey round metal plate just behind the spring on the shaft rotates!!!!!

So, how the hell do I manage to tighten the nut and by association tighten the clutch!

I apologise if this is a bit of a n00b question - but it's really starting to p**s me off now

well done for the mostly sucsefull build the slipper plates the grey ones should be located on the flats on the topshaft so they go on in this order

metal slipper plate
white slipper pad
spur gear
white slipper pad
grey slipper plate

both plates should locate on the flat spots on the topshaft so you can not turn them without turning the wheels then when you do the nut up you need to hold the wheels still as you turn the nut

a tip learnt by us factory drivers and a few others is to tighten the slipper all they way up and leave it overnight then set the slipper acordingly

to get the corect slipper setting you want the car to just pull the front wheels up on full throttle when you hold the rear wheels also you want the slipper to slip before the diff (diff makes a low barking sound) whereas the slipper makes a higher sound)

hope this helps
Carl

[sparrow.2]

The simple way to tighten the slipper nut is to put the car on the ground or a table, push down on it from above and tighten or loosen the nut while holding the car down. That way the wheels can't move and you can tighten or loosen the slipper as you like.

If your car makes a barking sound the diff is loose. If it makes a long whining noise you slipper is loose. You can also push your car onto the ground and throttle it to see when the slipper slips and how much it want to go.

[DCM]

Spiff, take the slipper nut, take the rear wheel nut off, and run it on and off the axle, making sure you thread the nyloc part of the nut, this should make the nut grip 'less' to the threads. This issue is that the nut is to big for the application.

Once done, as long as your diff is set, hold the wheels still and tighten the nut.

[Spiff500]

Originally Posted by DCM

Once done, as long as your diff is set, hold the wheels still and tighten the nut.

. . .

Without wanting to ask stupid questions - what criteria would determine if my diff is set correctly?

Once again - the instructions were a tad vague on that part?

So - the answer is grip both wheels and tighten/loosen. Cheers!

It's definitely slipping, I'm sure it's probably loosing a bit of power too - maybe always slipping to one degree or another.

I'll let you know how I get on - thanks again.

[kaylon]

You can just hold the large gear of the slipper and tighten it...

What you might find is your diff is too loose...that little tiny phillips screw in that tiny plastic 'T' shaped plastic thing..

I thought it was my slipper for so long till I heard about the diff... give that screw a few more turns

J

[sparrow.2]

To check if your diff is set properly tighten the slipper down fully, hold the right tyre and the spur gear with one hand and try and turn the left wheel with the other hand.
It should be hard to turn and feel very nasty when it does slip. If it is easy to turn the wheel you need to tighten the diff by removing the right wheel, popping off the ball cup and sticking a small phillips screwdriver into the right outdrive and tightening it.

Repeat this until it feels as it should.

Don'T forget to reset your slipper once you're done with the diff.