727 output shaft support won't come off shaft?
#3210348
02/03/24 09:00 PM
02/03/24 09:00 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
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OP
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Eugene, Oregon
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I've finally taken my 67 Coroner's transmission apart and found that the low/reverse drum cracked. The surface of the output shaft support where the drum rotates is also chipped up.
For some reason, the support will not come off of the shaft. It will slide back and forth a bit, but it hits a hard stop in either direction. I can't find anything in the 67 service manual illuminating what might be going on - I don't see any pins, snap rings or bushings.
I can see there's a hole in the shaft that aligns with the support but that just looks like an oil passage or something.
Do I need to notch it and chisel it off? I tried heating it with a torch a bit but that just made it easier to slide the inch or so back and forth where it's sitting now.
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: 727 output shaft support won't come off shaft?
[Re: TJP]
#3210389
02/04/24 12:01 AM
02/04/24 12:01 AM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
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Eugene, Oregon
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I'm going to assume you are removing it towards the Rear of the trans? this may help? LINKY It doesn't want to come off in either direction with the shaft totally out of the transmission. It slips freely in either direction then stops as if it's a press fit. Maybe I just have metal bits stuck inside from what flaked off of the outer surface?
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: 727 output shaft support won't come off shaft?
[Re: gregcharger72]
#3210390
02/04/24 12:02 AM
02/04/24 12:02 AM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
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You will need to hammer or press the support off. There are no clips holding it on. There is an oiling issue from the cooler , the cooler return supplies lubrication for the geartrain. Most likely the support is galled and has a ridge on it holding it in place Makes sense - am I at risk of damaging the output shaft in either case or is it hard enough to not worry about that?
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: 727 output shaft support won't come off shaft?
[Re: TJP]
#3210794
02/05/24 12:08 PM
02/05/24 12:08 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
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Eugene, Oregon
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I got it off after a little more heat and a larger hammer. Some little bits of something else were getting stuck in between the support and a chamfer in the shaft - shaft is indeed still fine.
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: 727 output shaft support won't come off shaft?
[Re: gregcharger72]
#3211020
02/06/24 12:12 AM
02/06/24 12:12 AM
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Joined: Aug 2006
Posts: 2,505
God's Country Maryland
GODSCOUNTRY340
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God's Country Maryland
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You will need to hammer or press the support off. There are no clips holding it on. There is an oiling issue from the cooler , the cooler return supplies lubrication for the geartrain. Most likely the support is galled and has a ridge on it holding it in place I agree, there's a small port hole where the cooling line returns from the radiator (or aftermarket cooler) to the rear of the case housing. I've seen this port plugged causing complete trans failure and the problem you're having. I think it would be a good idea to have a filter in the return line to stop debris from plugging this port.
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: 727 output shaft support won't come off shaft?
[Re: GODSCOUNTRY340]
#3211041
02/06/24 08:10 AM
02/06/24 08:10 AM
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Joined: Mar 2006
Posts: 9,835
MI, usa
dvw
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master
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MI, usa
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When you see debris damage. Check the converter, cooler, and lines. The rear cooler line feeds directly into the rear lube circuit. Had a a broken converter on my street car a few years ago. Drained the pan and went into the house to grab lunch. Came back out 30 minutes later. Started to remove the rear cooler line. Fluid sprayed out like a broken power wash connection for about 30 seconds. The entire rear of the line was packed solid with aluminum chips from the converter stator. I couldn't believe ther was still pressure a good 45 minutes after the engine was shut off. What a mess to clean up.
Doug
Last edited by dvw; 02/06/24 08:12 AM.
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Re: 727 output shaft support won't come off shaft?
[Re: dvw]
#3211215
02/06/24 06:26 PM
02/06/24 06:26 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
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Eugene, Oregon
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I had my rear drum crack almost all the way through to the center after getting deeply grooved, the rear band lost at least half of its friction material and at least one of the front clutch frictions broke - I found a big piece in the pan and then halfway up the pickup tube. The thing made it past 130k from the factory with the last 25k from me driving like an idiot, so I'm not complaining about the $200-some in wrecked hard parts I've found so far (though I am not super keen on the scored-up nose on the converter & what new TCs cost these days  ) I found that the surface on the output shaft is a little bit rough around where the support was riding. Nothing I can catch a nail on, no visual grooves or gouges, but not as smooth as the rest of the shaft either, so I'm not super confident it won't leak with a new output shaft bushing. How could I best clean it up at home?
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: 727 output shaft support won't come off shaft?
[Re: Secret Chimp]
#3211385
02/07/24 08:54 AM
02/07/24 08:54 AM
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Joined: Jan 2003
Posts: 75,004
U.S.S.A.
JohnRR
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I Win
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Posts: 75,004
U.S.S.A.
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I had my rear drum crack almost all the way through to the center after getting deeply grooved, the rear band lost at least half of its friction material and at least one of the front clutch frictions broke - I found a big piece in the pan and then halfway up the pickup tube. The thing made it past 130k from the factory with the last 25k from me driving like an idiot, so I'm not complaining about the $200-some in wrecked hard parts I've found so far (though I am not super keen on the scored-up nose on the converter & what new TCs cost these days ) I found that the surface on the output shaft is a little bit rough around where the support was riding. Nothing I can catch a nail on, no visual grooves or gouges, but not as smooth as the rest of the shaft either, so I'm not super confident it won't leak with a new output shaft bushing. How could I best clean it up at home? Pictures of what you are talking about ... TC snout and shaft
Last edited by JohnRR; 02/07/24 08:55 AM.
running up my post count some more .
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