jcoby

Does anyone have decent pictures of the improved style upper arm shaft? It looks like they've turned down the shank of the shaft to accept an O-ring. I can't tell from the pictures I can find what else they modified.

My shafts are in decent shape but the boots are shot. I'm trying to put my lathe to use and save $150.

2+2GT

Turning down the shaft sounds like a good way to weaken it. The cap should have o-rings to provide the seal.

$150? $50 should get you a new pair of shafts, with caps and seals.

kalli

i have bought a set at NPD that are not i the car yet. are at buddies garage.
If I make it over this week I'll take a few pics

jcoby

well the stock ones taper slightly from the thread to the bolt boss. that won't work for an o-ring; there just isn't enough space.

using a rounded tip will eliminate any problems with stress risers. the weakest point is the troughs of the threads (minor diameter) and I won't be going anywhere near that small. it'll only be even with the thread major diameter. we're talking about removing like 0.040 here.

the improved style are about $75 each. yeah, you can get stock style for $50 each. it doesn't cost me anything to try. worst case is that i have to buy new shafts.

jcoby

thanks

2+2GT

Seriously, the stock type is $25 each. Why don't you make your .040 cut inside the cap?

That's a pretty small o-ring, though the stock seal is more like a 3/16 thick o-ring.

OCHOHILL

There is a picture of it on NPD classic mustang catalog, page 73.
Basically there is a rubber seal that seals the shaft to the outside of the end cap. I can't see how those 2 extra seals justifies an extra $30.

jcoby

my stock caps don't look anything like that. they have a large boot that goes on the outside of the cap and then steps down to the pivot. maybe they're not stock? i'm just trying to find a way to keep the grease in.

also, where can I get a complete shaft for $25 each? they're $50+ everywhere I've looked.

2+2GT

Oops, my mistake. They're $23.50 each. The price just went down.

jcoby

i must have the improved design then. though they look as old as the car, this thing had a "restoration" done about 15 years ago. they may have swapped out the shafts then. 2 of the 4 are crushed 1 is split, and 1 is in serviceable condition. there isn't really any provision for a stock-style O-ring that I can find.

also, you guys know I have a '67 right? '66 are cheap, '67 are not.