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| A904 Rebuild Question, Tailshaft bearing https://www.slantsix.org/forum/viewtopic.php?t=55374 |
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| Author: | Chuck [ Sat May 17, 2014 10:38 am ] |
| Post subject: | A904 Rebuild Question, Tailshaft bearing |
I am rebuilding a few A904 trannies. I have done several of these and they all had a bushing in the tailshaft and required a selective washer to set the tailshaft end-play. Now I have run across one with a bearing in the tail piece. The bearing locks the tailshaft in place so that there is no end-play, but I don't know if there is still supposed to be a fiber washer on the front of the tailshaft. The FSM is no help. There are no pictures of the tranny with the bearing, so I can't see if there is a washer installed. Anyone know? Thanks, |
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| Author: | slantzilla [ Sat May 17, 2014 2:40 pm ] |
| Post subject: | |
IIRC, there is a fiber washer that goes there Chuck, and there could be varying thicknesses. Long time since I did one though. |
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| Author: | Chuck [ Sat May 17, 2014 3:49 pm ] |
| Post subject: | |
Quote: IIRC, there is a fiber washer that goes there Chuck, and there could be varying thicknesses.
I have used the "selective" fiber washer on the trannies with a tail bushing to set the end-play, but it can't do anything for the tranny with the bearing because the bearing locks on the shaft and into the tailpiece and prevents any back and forth movement of the shaft. That is why I am confused. If I put a fiber washer there, it doesn't seem like it will do anything.
Long time since I did one though. |
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| Author: | Charrlie_S [ Sat May 17, 2014 6:38 pm ] |
| Post subject: | |
I have never seen a 904 without a "bearing" on the output shaft. You are talking abut the bearing that has a snap ring in the tail housing that has to be spread to remove the housing, correct? There should be a fibre washer on the end of the output shaft, between the output and input shafts. The washer is a selective fit. |
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| Author: | Fopar [ Sat May 17, 2014 6:47 pm ] |
| Post subject: | |
As Charlie said the bearing on the output shaft is snap ringed to the shaft and to the housing. How could you adjust the end play? Richard |
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| Author: | Chuck [ Sat May 17, 2014 8:49 pm ] |
| Post subject: | |
I have rebuilt about 6 904's, and they all had a bushing in the tail, NOT a bearing. On those, the selective washer is necessary to adjust the end play. On this one with the bearing, it does have the snap ring that locks the bearing into the tail piece. Since the shaft can't move, there is no "end play". So what would the selective washer be for? How would I tell what size to use? With the bushing type, the washer is set so that the end-play is within the spec listed in the book. See the attached PDF for the bushing type trans. The bushing is #54. The selective washer is #19. I also have a picture of the V8 tranny, which shows the bearing and NO selective washer. The bearing is #72. http://www.slantsix.org/photos/A904_Transmission.pdf http://www.slantsix.org/photos/V8_Tranny.pdf |
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| Author: | Charrlie_S [ Sun May 18, 2014 4:18 am ] |
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OOPS. I totally forgot about the 65 down trans, having the bolt on flange. Even though, I have one of those in my Cuda, I haven't done one in about 10 years. I need to look at one out in the shop, today, to refresh my memory. I will get back to you. PS: On the 66 up trans that thrust washer, controls the "INPUT" shaft end play. |
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| Author: | Charrlie_S [ Sun May 18, 2014 4:44 am ] |
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Quote: I also have a picture of the V8 tranny, which shows the bearing and NO selective washer. The bearing is #72. |
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| Author: | Chuck [ Sun May 18, 2014 12:07 pm ] |
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Thanks Charlie. I'm still trying to figure out what to do. Unfortunately I took this tranny apart over 6 months ago, and I don't remember if there was a thrust washer there (there isn't now). Those brain cells got re-purposed a long time ago! |
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| Author: | Chuck [ Sun May 18, 2014 3:54 pm ] |
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OK, I think I know where my brain went off the rails! I have always adjusted the end-play on the bushing type trans by putting a dial gauge on the tail shaft. After going over the book, I read where they say to measure the end-play from the FRONT shaft! That makes sense now. It doesn't matter that the rear shaft can't move when you measure from the front! DOH! (Dope-slap applied) |
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| Author: | Charrlie_S [ Sun May 18, 2014 4:06 pm ] |
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There you go. If you have any problems, you can call. You have my number. |
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| Author: | Chuck [ Sun May 18, 2014 7:58 pm ] |
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Thanks Charlie. It should be easy now! |
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| Author: | Charrlie_S [ Mon May 19, 2014 6:36 am ] |
| Post subject: | |
Quote: I have never seen a 904 without a "bearing" on the output shaft. You are talking abut the bearing that has a snap ring in the tail housing that has to be spread to remove the housing, correct? .
Update: I got thinking about this, and did some research. The earliest 904 I have worked on was a 1964, and they had a bearing in the tailshaft extension. Using the factory part manuals for 1963-64-65. 1963 item 54 in the picture, is listed as a bushing 21-04-11 part number 2124 607 1964 item 54 is listed as a bushing 21-04-11 part number 2124 607 OR a bearing part number 2464 545 for VP1, VD1, police and taxi, VP2, VD2, VA3,VV2, VL2 1965 item 54 is listed as a bearing only, part number 2464 545 That explains why I never saw a 904 with a bushing. Mopar upgraded this part from 1963 to 1965 This a a great example of why the correct year manual is important. Even though the trans is similar, there are important differences. |
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| Author: | Chuck [ Mon May 19, 2014 10:11 am ] |
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I looked at the '63, '64 & '65 parts manuals and found that the '63 & '64 trans show a bushing, and the '65 shows a bearing. I plan on using the '65 tranny in my '63 Dart. Although the tranny is about 1.5 inches longer, DS stated that it would fit because the yoke would make up the difference. My dad had a '65, and we had that tranny replaced a few times. We always took a core into the tranny shop and had them rebuild it, replacing the valve body with the one from the '65. They never had an installation problem, so I guess the '65 should fit in the '63. In those days I didn't do the tranny work, so I never saw the bearing type trans. That is probably where I got this spare. |
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| Author: | CRANKSNAPPER [ Thu Oct 31, 2019 5:20 pm ] |
| Post subject: | Re: |
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