2t and 3t have different clutches?

[ctrain]

So i was under the impression that a 2t and a 3t were basically the same engine except for the displacement, i went to the geelong brake and clutch and it turns out a t18 and a ta22 both have differnt part numbers for kits, i currently have a
ta22 t-50 and a t18 3t yet the thrust bearing and carrier are different to the ta22 one, the 3t has a larger bearing requiring a larger carrier, anyone else noticed this?

Not sure about the clutch fork, im hoping its the same as a ta22 one :/

Cheers,
Callum

[ta22fan]

The info I've seen indicates that the 3T is a direct swap-in for the 2T in a TA22. Same engine block with bigger bore and different internals (pistons, con-rods & crank shaft).

[ctrain]

yep thats exactly what i thought, im pretty sure it is, maybe its only the flywheel or clutch setups that are different, heres a few pics

turns out the one i had was a Heavy duty clutch, so i bought a standard replacement, i wont be giving the engine a hard time so i have to need for it atm, plus it was only $150





as you can see in this pic the 3t bearing is larger then the what im asssuming is a 2t/2tg bearing, hence why it doesnt fit on the carrier



Cheers,
Callum

[ta22fan]

I've got all the parts of a stock TA22 (2T/T50) clutch in the shed. Came out of a '73. I'll take some measurements and take some pics this weekend if you think it'll help.

[ctrain]

cheers mate!

[ta22fan]

Callum, for what it's worth - here you go. First one is the fork & thrust bearing, plus the clutch slave cylinder. The socket at the end of the fork where the adjustable shaft fits in is a bit different on this fork. My '74 has a somewhat larger socket with a hole - I've shown a spare that's the same as my '74 in the photo as a comparison. However the overall shape and size is the same as best I can tell. Width of the flywheel is around 28 or 29mm as best I can tell. Let me know if there is anything else I can help with.

[ctrain]

thanks mate, my one is the same as the one on the right in the first pic, any chance you could measure the thrust bearing carrier diameter as per the pic below?



Cheers,
Callum

[mynameisrodney]

Mine is the same as the one on the right in this pic (not sure about on my spare gearbox as I couldn't get under the house to look for it). I have pics but they're not as good as these ones.

Cheers,
Chris

[ta22fan]

Bit hard to get a accurate measure with the bearing in place - but as best I can make it - around 37mm

[brucey]

Hey Callum, how did you go with this?
I'm in the middle of installing a 3tc (t18) clutch kit with the ta22 t50, but have ran into the problem with the larger throwout bearing. I wonder if people just use the smaller 2tc bearing with the 3tc clutch? I guess it could wear out quicker with the stronger spring force from the 3tc pressure plate.

[ctrain]

hey mate, i got it all working, it turns out its basically impossible to use a t18 thrust bearings as it needs a bigger carrier, which is pretty hard to get, so i stuck with the smaller thrust bearing and carrier that came with the t50 (which is a 2t one), it turned out that the small thrust bearing wouldnt work with a heavy duty 3t clutch due to the bearing pushing on the fatter part of the fingers, but its works fine for a standard clutch with the thinner fingers.

Cheers,
Callum

[allencr]

Edit for stupid.

[brucey]

hey mate, i got it all working, it turns out its basically impossible to use a t18 thrust bearings as it needs a bigger carrier, which is pretty hard to get, so i stuck with the smaller thrust bearing and carrier that came with the t50 (which is a 2t one), it turned out that the small thrust bearing wouldnt work with a heavy duty 3t clutch due to the bearing pushing on the fatter part of the fingers, but its works fine for a standard clutch with the thinner fingers.

Cheers,
Callum

OK, I think I had a standard replacement 3tc clutch pressure plate on before, with the smaller thrust bearing and ta22 clutch fork.
I've got a clutch industries rpm heavy duty clutch for a t18 that I'm putting on. The fingers on the pressure plate do look thicker than standard. I'm going to try the smaller thrust bearing with it and see how it goes. The 2t and the t18 thrust bearings have the same diameter at ~67mm, so the smaller 2t thrust bearing should be able to work with the 3tc clutch.

So the smaller thrust bearing couldn't push the fatter fingers on the 3tc clutch far enough?

Just made some bearing measurements with calipers:

3tc bearing
outer diameter 67 mm
inner diameter 40 mm
thickness 19.8 mm

2tc bearing
outer diameter 67 mm
inner diameter 38 mm
thickness 16 mm

[J-M kujala]

Yeap .

Hard thing is, these parts are messed up in almost every car

Early ta22 with 2pin clutch cover is hard to get but 3 pin is a lot easyer

[brucey]

Yeap .

Hard thing is, these parts are messed up in almost every car

Early ta22 with 2pin clutch cover is hard to get but 3 pin is a lot easyer

Did you mean the dowel pins on the flywheel to fix the clutch cover into position? Yeah they are messed up. My spare 3tc engine had the early 2 pin clutch cover.