CAT99 vs 30 series

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The Noose

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So, I picked up an old yerf dog buggy that has what I belive is a CAT99 torque converter. The driver unit appears to be in good shape. Needs some cleaning, but nothing major. The driven assembly is another story. It has missing buttons, is seized up with rust. Looks like it has some pitting on the inside of the sheaves.
I could probably get it working again with a little sweat and a plethora of curse words, but I really don't feel like wasting time on it when there are other things on the kart that need work.

Anyway, from my untrained eyes, the driver unit on the CAT99 looks identical to the 30 series driver. Being the cheapskate that I am, I was thinking I might save a penny and just order a new 30 series driven assembly and use it with the driver from the CAT99 unit.

Is there a reason I shouldnt? Is there any difference? They both are assymetrical. From what I understand the CAT99 uses an assymetrical 5/8" belt where the 30 series uses a 3/4" belt, but that doesn't affect the driver does it?

If that's not a good idea, can you get parts for the CAT99 driven assemblies anymore? Specifically the little plastic buttons? Are the CAT99 torque converters as good as the 30 series when functioning properly?
 
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The Noose said:
Is there a reason I shouldnt? Is there any difference? They both are assymetrical. From what I understand the CAT99 uses an assymetrical 5/8" belt where the 30 series uses a 3/4" belt, but that doesn't affect the driver does it?

If that's not a good idea, can you get parts for the CAT99 driven assemblies anymore? Specifically the little plastic buttons? Are the CAT99 torque converters as good as the 30 series when functioning properly?
Click to expand...

very little difference, but a cat99 driver won't work with a series 30 belt (not properly that is)

here's what to do:
disassemble the driver, and measure the length of the post of the fixed sheave.

there are two options 1/2" or 5/8".

Now, if the post had 2 spacers and is half an inch, or if it is just five eigth.. then it is a series 30.

if it's half an inch and there were no spacers it's a CAT99

If that is a CAT99; then these spacers will be needed to use a series 30 belt and driven:
http://www.mfgsupply.com/gomini/gom.../gominiclutchtorq30driveparts/200836a-w2.html

Driven cam buttons are identical for series20, series30, TC88 and CAT99;
but, there have been brownish and black buttons,
black's have a straight shaft and are press fit,
brownish ones have a recess to snap in place.

both can be found here:
http://www.mfgsupply.com/gomini/gom...utchtorq30/gominiclutchtorq30drivenparts.html

'sid
 
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Thanks guys but I don't think I asked my question very clearly. What Im asking is will the driver that I already have (which is a CAT99 driver) work with a 30 series driven assembly. I would use a 30 series belt.

The reason I ask is that the driven assembly on my CAT99 is rusted and needing a lot of work, but the driver assembly is in great shape. If the CAT99 driver is compatible with a 30 series driven, I would rather just buy the 30 series driven for 50 bucks rather than an entire new torque converter for 100. If it wont work, then Im just going to buy a whole new torque converter, but if it will work, why waste 50 bucks?

And that link says the buttons on the driven are all the same, but the buttons on my CAT99 definitely don't look anything like the buttons that the 30 series uses. I don't have a picture at the moment but I will take one when I get home and post it so you guys can see what I'm talking about. I haven't seen any place that sells buttons that look like the ones my TC uses.

Thanks for the help and advice as always.

---------- Post added at 08:47 AM ---------- Previous post was at 08:42 AM ----------
itsid said:
very little difference, but a cat99 driver won't work with a series 30 belt (not properly that is)

here's what to do:
disassemble the driver, and measure the length of the post of the fixed sheave.

there are two options 1/2" or 5/8".

Now, if the post had 2 spacers and is half an inch, or if it is just five eigth.. then it is a series 30.

if it's half an inch and there were no spacers it's a CAT99

If that is a CAT99; then these spacers will be needed to use a series 30 belt and driven:
http://www.mfgsupply.com/gomini/gom.../gominiclutchtorq30driveparts/200836a-w2.html

Driven cam buttons are identical for series20, series30, TC88 and CAT99;
but, there have been brownish and black buttons,
black's have a straight shaft and are press fit,
brownish ones have a recess to snap in place.

both can be found here:
http://www.mfgsupply.com/gomini/gom...utchtorq30/gominiclutchtorq30drivenparts.html

'sid
Click to expand...

Thanks SID, I just re-read your post and I think I misunderstood what you were telling me.

So what I gather is that the series 30 driven will not work with the CAT99 driver without the modifications you mentioned. Am I understanding that correctly? In other words, I cant just buy a 30 series driven and 30 series belt and use it stock with the CAT99 driven that I already have?

---------- Post added at 08:50 AM ---------- Previous post was at 08:47 AM ----------
KartFab said:
$50 for a new driven unit vs $84 for a complete 30 series tav2... Check on eBay.
Click to expand...

84 bucks sounds great and I tried ordering one of those, only to find out the place selling them on e-bay doesn't actually have them in stock and I have to wait at least 15 days before they get them, then another week for them to ship them to me. Id rather pay another 40 bucks and not have to wait a month to get my go kart running.
 
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well

let me put it this way:

the sheave angles of the series 30 and the CAT99 are identical, so is the diameter of the driver clutch, and as far as I know, even the weights and springs are identical.

So only thing left is the belt width.

I know, the CAT99 has a 1/2" post as had the OLD series30
newer series 30 have a 5/8" post; the two spacers I linked are 1/16" each and are the original part for OLD series30 drivers...

Sooo, I say, the driver is technically identical (cat99 vs OLD series30)
except for said two spacers (which conveniently add up to 1/8, which is exactly the difference you'd need)

I can only assume that adding the spacers to a CAT99 driver will make it suitable for a series 30 driven and belt;
but at least that sounds perfectly plausible, right?

What I can say though is, that with an eighth of an inch missing, you'll ruin the belt.
(and since a belt is ~25 bucks... that's not exactly fun either.)

'sid
 
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