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Old 06-04-2005, 01:04 PM   #1
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Default Tamiya Gears in a TTech Predator

Hellow dude's I am working on a gear conversion for the Predator from Tenth Technologies.
It will also be posted at www.the-pred.co.uk, so take a look there too !

Tenth Technology Predator 4WD Buggy :
Alternative gears
By Jeroen ‘Cooper’ Vanneste MBV kampenhout, Belgium

As most of you know, the predator series are known for their looks and their ability to be fast! But they also have to the ability to break fast but the thing that has led to the most frustration on predator owners are the differential gears. They wear very fast, they CAN live ‘long’ if you handle them correct, but still they wont last for months or years.
In the beginning we had the black gears, these wore very fast, later the white version came and those were the most durable IF you shimmed it all perfect.
It’s not something you can do in 1-2-3, it took me several sets before I knew how to shim correctly, and still sometimes things go wrong. The problem is that Ttech gears are a rare, nobody wants to sell his precious set of predators gears.
The problem is that they made their teeth too short, in a ball diff you always have a small amount of play on the diff gear, and your prop shaft with the pinion push away the diff gear, with bigger teeth, the chance of stripping is much less. (once my gearbox didn’t close enough anymore and the diff could go ‘up’ so the play between diffgear and pinion became to big à stripped the pinion)

Some tips to shim your gears correctly:
--use the alu diff hubs
--the diff must be as close as possible to the pinion
--no movement at all in the diff, if needed place a shim on the other side to !
--put some grease on the gearbox edges to prevent sand and dust from coming in
--if you aren’t to lazy, change the postition of the diff gear vs the pinion several times, the internal ratio is 3/1 so same teeth are always hitting eachother à weird wear patterns à vibration.

Now Ttech has come up with a new car !! The X-10 we all thought that we could those new gears in our old cars,
Yes we can, but the whole transmission needs to be changed ! They will over a special package for 100£ but this is still to much!

So we need to look for other solutions!
Aha ! TC3 gears !!
David grunhill is the man who made adapters and the whole thing to use TC3 gears.
But the Asso TC3 uses american standards, and Ttech uses metric standards,
So you have to make adapters for the diff, buy tc3 diffs....

So I went looking for metric gears, and I came found the Tamiya TB Evo III gears (same as TB 02 and F201)
They are almost ideal, no adapers to be made, just some cutting and sanding.

The ‘how to’ will be here within a few weeks....
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Old 06-06-2005, 08:44 AM   #2
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Default - part 2 -

Part 2:
Parts needed:

--Tamiya bevel gears –50987-- 2 sets, (it are the gears for the TB evo III, TB02 and F201)

--Bearings: 1— 2* Tamiya 850 size (4mm inner diamer, 8mm outer, 3mm thick)
2— 2* (8mm inner, 12mm outer, 3.5mm thick) NOT flanged

--Diff_Balls: 20* 3mm balls

--Bushing, 4mm inner diameter 5mm outer diameter

--Some original predator parts (old pinions, diff, flanged bearings )

I have exams and I am still waiting for my order (diff balls) so pictures and more words will come later!
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Old 06-24-2005, 06:26 AM   #3
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www.the-pred.co.uk for the the full article !!!
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