Dear @Rat Bastid , if your scathing comment was directed at me, then here is a refresher for you; If not to me then it's still a refresher; no foul/no harm.
Yes I agree that my Clutch killed that weakazz A833 overdrive gear. so then;
I took out that dual-friction, very early in the program, and put it on the wall of shame. I replaced it with a factory 340 disc that I had in stock since the IDK 70s or 80s.
When the hub tore out of that, I reduced the clamp load, and installed another brand-new 340 disc.
When the friction material on that one shredded, I learned to reduce power on the GearVendor during split shifts.
After that, she's been a lot easier on discs, going sometimes three summers on a disc.
See; I can learn.
The static clamp load is so low now, that, with a starter gear of 10.97, I can about dump the clutch at just off idle, and the factory 340 flywheel will motor the car away, with just the right amount of slip.
The unit slips a lil below ~2800, on power application, but by 3000/3200 she is on the flyweights, and the tires are on fire.
I'll tell ya, not one of those od gears ever got full power, and my lo-po winter-318 snapped one too. So IDK, call me crazy but I'm sticking with those A833od gears being weakazz. I mean look at them; they don't have even 3 full teeth engaged at any time. That's 3 teeth for a what? say a 200 ftlb, stock, smoggerteen on the TQ primaries?
I learned to toe the clutch on the manually shifted GV; and To baby it into double overdrive. And I geared the car up, so that the A833od was rarely used. With 3.55s, 65=2240 in GVod/1590 in double over. The 230* cam didn't like double anyway at 65mph. At cruise power, the clutch does not slip. I set it up for that.
After the Third weakazz A833od gear broke, I stopped using that combo. I still have at least one spare, maybe two. It's been 18 years so not sure. I do remember that one of them has a slick-shifted second, and possibly direct also, cuz I ran it with 4.30s to 5.38s, to get a crawler gear.
BTW-1
for those that might want to know:
With 3.55s the roadgears were;
10.97-8.56-5.93-4.62-3.55-2.77-1.97 with splits of
.78-.69-.78-.77-.78-.71 GV ratios in red.
Shifting at 5600, the rpm drop with a .78split is to 4370 =1230rpm..... so she is riding the very top of the powercurve.... almost like a CVT. It was a lotta lotta fun; until the camlobes began to fall off.
Btw-2
I took the broken od gear out of one of the busted ones, that still had a usable core section, cleaned it all out, reassembled it, and drove it as 3 speed with the GVod bringing up the rear, still splitting gears,as the occasion presented itself, but gone was the Double-od, which I never missed. I left the non-functional od gear in there to support the brass ring and make sure the struts stayed where they belonged, so I could still have a synchronized shift into Direct gear.
Btw-3
With 3.55s, 5600 is 127mph in Direct gear. I almost never go there, but if I did, I would next hit the splitter, for 127=~4400 in Direct/GVod. I would then slow to 75 or so, and at 75=2600, now would be the time to engage the weakazz A833od gear, which would take 2600 down to ~1850
Ok so by this time, the engine has been steadily winding down, and the throttle plates are and have been, nearly closed, for a good long time.
If that weakazz A833od gear can't take a shift at 2600 with the throttles nearly closed....... what can be said?
However:
What I did do often with that combo, was shift 1-1od-2-2od for 5600=97 mph in 2od. Now remember, the main stick is still in Second. From there I should go to 3od which would be 3340 rpm and the carb should be closed, cuz you know, I gotta get back to sub65mph before I get a ticket.
But one time, I mean one time, I slammed it straight into 4od and the engine had to go from 5600 to 2370 in the blink of an eye, and the od gear just said; "are you effing kidding me?, not-a-stinking-chance."
Ok I get that one. My bad.
Now; I want to point out that, in the same situation, it is my belief and opinion, that no other similarly-rated aftermarket 5-speed/od, would have suffered such a catastrophe.
Ok there's your update; feel free to scathe me some more.