I did some searching and did not find the answer to this, Mazda made (at least) a coulple different FD clutch throwout bearing arms, I have both aluminum and steel ones. Which type is better and why? Thanks in advance

 

I don't think they made an AL one for FDs.

 

Jeff, you could be right, I checked 2 transmissions in storage and they both have what look like cast aluminum pieces, but a magnet sticks, so are probably forged steel. I got a formed steel arm in a collection of what was supposed to be only FD parts and thought I read they had made 2 different arms, but guess I was mistaken, thanks

 

Supposedly the part was updated at some point, with better metal or something.

The part number is n315-16-520b - the "B" at the end means the part was revised, first no letter, then A, then B. But, looking at the fork, you'd probably never be able to tell if it's the revision or not.

All the forks will be cast iron, never seen a cast aluminum one and I don't think it could hold up to the stress.

Dale

 

The pressed steel part is probably from a FC. I would buy a new one just to be sure, they are less than $100 IIRC.

 

I read that the revised clutch arm was incorporated in '94... if I have a '94 car, would it be safe to assume that it has the stronger clutch arm? Or was this a mid-year implementation?

I'm doing a clutch job soon and would like to save $100 if possible, but at the same time I don't want to risk it if I'm not sure.

 

Having the forks break is pretty uncommon, really. But, if you're putting a heavier pressure plate in, I'd do it. If you're going for a pressure plate that isn't heavy, you should be OK.

Dale

 

Mine broke last yr, I say do it.

 

i doubt the revision is dramatic. problem is just fatigue over the years so if you are installing a heavy duty PP it isn't a bad idea to replace it with the revised part.

i have never noticed any difference in any of the throwout arms.