Tranny Output Flange O.O.T??

Eric,

Replaced output flange with new.......same problem. Ever heard of the main case bushings wearing into the casing and causing misaligment of drive end? Everyone I've spoken with has rarely seen main rear bearing problems and no-one has ever seen a bent output shaft. One has seen the main case bushing wear from gross and long term misalignment; someething my boat probably had.

Any comments/thoughts appreciated.

you'll need an half inch impact on the boat, its a slide fit, and dont forget and it is one of only a few spots i will use silicone, under the nut....no press on the coupling

its quite a chore to dial them in once they are bent, i could easily come up with flange for you and i will face it also, ive recieved a ton of them with bent flanges from shipping and on dis-assembly the damage stayed isolated to the coupling but i still replace the back bearing. the output shaft is around 55 rockwell and would be hard pressed to bend, i believe it would snap instead...but indicating it would ease your mind. At times though when you spin these output flanges the illusion of a bend will exist because the backside is uneven and not machined and it will appear as the flange is bent, thats why its important to do a runout on the face, and shaft. really though, if the shaft is straight i dont think there will be much more damage than the coupling, these tranny's are durable and remember the bearing pushes a 2500 lb boat so it takes alot to fail that bearing but not alot to bend the "soft" coupling

Actually, the tranny worked fully when water tested at purchase. No slipping or lack of neutral, etc. After that water test last summer, has not been run but rebuilt as indicated in first post.
It's almost as if flange face has been bent by tranny being dropped. There is no detectable slop in shaft; although I have not done runout as do not have dial indicator/base, etc.

Eric, I know you have tons of experience on these tranny's. Have you ever seen the output flange be OOT? I see where replacements do exist but wouldn't want to go that route if suspect further damage inside such as main bearing, etc.

I'm leaning towards just yanking the whole dam thing and buying a new tranny and be done with it. My engine was rebuilt by some primo mechanics as the original had some rust/ring damage in 2 cylinders.

Does my diagnosis sound correct about the output flange. Like I said, I got the engine in alignment (tight all round the flanges) and was wrapping up when I decided to check with tranny flange rotated some. That's when I discovered this. Doing careful checks and rotating the tranny flange 90 degrees each time, the gap moved around with each move of the tranny flange. For each tranny flange position, the shaft flange was rotated/checked through 360 degrees and the location of the gap didn't change.

I'm hoping someone can give me some guidance ASAP.
Doing alignment on a rebuilt 302 Ford Commander. Engine is primo.
Thought I had everything in alignment until I checked again after rotating velve drive output flange. Whoa!!!! Back out. Gap moves with tranny output flange location. Drive shaft is new Elbert's with tapered
coupling. Best I can tell it's true because with alignment "in", good through full rotation of shaft. Also, when out (after moving output flange), location of gap doesn't change with prop shaft rotation.

History: This Tique had trashed stringers (virtually no wood). I got scammed by seller and dealer who "inspected" for me. As part of settlement, dealer "rebuilt" tranny (clutch plates and normal wear parts, seals etc.) and they were shot.   I know they did nothing with main bearing as mechanic stated: "never saw problems with these".

This boat was rode hard with bad stringers. Anyone heard of the tranny output flange being OOT??

Any/all help greatly appreciated. I'm winding this project up and have a lake place rented in late June.