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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Chuck Rivers, Webmaster

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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Official Cookie and Mater Tormentor.

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.

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Chuck Rivers, Webmaster

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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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

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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Part of Tyrde-Browne Racing

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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Chuck Rivers, Webmaster

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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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

That picture is a 727 trans, which is different than the 904. The 727 should still have the thrust washer, between the two shafts (might be item 6 in the picture) but in the 727 this washer is not select fit. The end play is controlled by the select fit thrust washer on the reaction shaft support (item 51, I think). On the 904 the reaction shaft washer is not a select fit.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

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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Chuck Rivers, Webmaster

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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Chuck Rivers, Webmaster

There you go. If you have any problems, you can call. You have my number.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Thanks Charlie. It should be easy now!

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Chuck Rivers, Webmaster

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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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

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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Chuck Rivers, Webmaster

THE OUTPUT SHAFT BEARING IS OBSOLETE (FAG 2A836) I.D. 1.1645" [/u] O.D. 2.44" W. .63'. SNAPRING

ALTERNATIVE WORKS WELL: (6206) NO SIDE SEALS I.D. 1.181" O.D. 2.44" W. .63" SNAPRING

https://www.ebay.com/itm/1-pc-6206-open ... 8122!US!-1

YOU CUT 3.5" LENGTH OF 'FEELER GAGE AND SLIDE IT BETWEEN SHAFT & I.D.

https://www.ebay.com/itm/008-Thick-1-2- ... SwMmBVpBc2

N-O-W EMERSON BEARING HAS 4 ORIGINAL BEARINGS LEFT. I SCOURED WORLDWIDE AND FOUND SOME FROM GERMANY (FAG 2A836's)…….

BUT I LIKE MY ALTERNATIVE BETTER...….$9...….INSTEAD OF $54. SINCE I BUILD RACE A904's THIS IS A GOOD SETUP.


KNISELY TRANSPORTATION 425806520NINE