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Discussion Starter · #1 ·
Hi,

I was trying to run a couple of my old porsche cars (the silver and gold ones from the old LeMans set) on a classic track I set up.

The gold car still runs fine (after cleaning/oiling) but the silver car is having trouble with the rear wheels sticking.

I opened up the car and took the rear wheels out to check the motor ran ok, which it does. It seems to be a problem between the gears that sticks.

I cleaned the teeth of both gears and they look to be in good condition. I tried the small gear at various points along the motor spindle to see how it meshed with the large gear and it appeared no different than on my other cars.

Any ideas on what the problem could be?

I was wondering if the back axle has become slightly bent, but I've not checked for that yet. I was also going to try the back axle/gears from the gold car to check that too.

Other suggestions welcome
 

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I've had problems with the pinion gear on some of my older Scaley cars - they had a tendency to split causing erratic running. Or, in some cases no running!

I know you've checked the gears but it might be worth one more look.
 
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Hi.

My suggestion would be to replace the smaller of the two gears (the pinion). They have a great tendancy to crack near the centre and thus puts the pitch of the gear out and so jams the rear axle.
The parts you require are avaliable from a local model shop or from www.pendleslotracing.co.uk From previous experience a call to Pendle Slot Racing will help you understand and you shouldn't have any more problems.

I will hazard a guess that Slot.it pinions will be suggested as a replacement which will need a special tool to affix them to the motor but are of much higher quality and won't wear out as they are manufactured in brass.

Baz
 

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i've had similar trouble with these old porshes...usually its the old style pinion that has split..the later pinions have reinforcement at one end which helps...toothed one end...circular ridge the other...as for the axle..it could well be bent...dismantle rear axle remove wheels and roll the axle along a flat surface like a mirror or piece of glass and you'll see at a glance if its straight or not..hope that helps..these old porsches are not very fast by todayts standards..but substituting some later scalex wheels ( i use some from a from a mondeo helps bring the car closer to the track and helps running...they are also very durable
 

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Discussion Starter · #5 ·
Thanks for the comments, will try them out.

I've noticed that the old cars are slow when compared to my motogp bike, but that's fine for now as I can get some practice without the cars flying off the track so much


I was thinking of getting those cheap scaley audi tt cars, which look like they'll take a bit of crashing, while I get up to speed (excuse the pun).
 

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Discussion Starter · #6 ·
On closer inspection, the pinion is indeed split at the point it was sticking.

I will pick up spares at the weekend in town.

Thanks again.
 
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