TR2/3/3A 3A Clutch Disc and 4A Cutch Disc?

[karls59tr]

I bought what was supposed to be a new 3A clutch disc from Ebay. On close examination it appears that the raised part(where the input shaft goes thru the disc) on the opposite to the flywheel side protrudes 5/32 higher than the same area on the old TR3 disc! I believe it to be a TR4A clutch disc.
Anyway I can use that disc on my 4A when I get around to restoring it.
It seems that these clutch parts are often mislabeled by sellers on Ebay and I might be further ahead ordering from the Big Three.
What would happen if a 4A disc was used with a 3A pressure plate.???

 

[CJD]

I've been having a rash of wrong parts too.

eBay is running about 50% that I have to return. Even the big three are causing me grief. I wish they would differentiate between like original and serviceable replacement parts. Nothing is more of a dead give away as "not right" than Phillips head screws on an old Triumph. As a result I'm returning about 25% of the parts I've ordered from the three.

Back to your issue with the clutch...

If you install the pressure plate, you should be able to check through the release fingers to see if there is clearance. Maybe someone has already tried it, though...?

 

[TR3driver]

Isn't the 4A disc a smaller diameter than the 3-4 disc?

Hopefully I won't run afoul of Basil's "No eBay bashing" policy, if I just say that some eBay sellers seem to be either willfully ignorant or deliberately deceptive about what cars their parts will or will not fit. I see ads constantly (as in a new one almost every day) that advertises some part as fitting multiple TRs when they clearly did not all take the same part! Some of the ads admit (in the fine print) that they aren't certain what car the part fits; but others confidently state that, for example, that Girling MC reservoir will fit your TR2. I even emailed one seller, who assured me that the disc brake rotors he was selling would fit my TR2!

 

[Got_All_4]

A lot of deception out there on the net. Doing some searches one time a supplier said they had a window regulator in stock for my TR3??? Would have loved to see a picture of that. For major parts like your clutch I'd stay with the so called big 3. Plus not good to mix match clutch parts. Also now that you have it and if that is the only obvious difference in the 2 parts and we'll say for argument sake it's not usable because of the extra length, you should be able to have it turned in a machine shop to proper specks. Good luck!