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09-30-2013, 06:10 PM | #1 |
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Restoration Qs...early 28 transmission case
I have an early 28 transmission case, it's worn, similar too this thread.
...Transmission info.... I have .041" end play with a new cluster and new thrust washers(tws). It's the case, not the gear or tws, you can see it in the case. I called Van Pelt's, Mac said .005"-.015" for 32 thru 48's. Does anybody have any new information? I checked every book I have including the Service Bulletins...no help. I'm going to make a new tw with .006" clearance if I get no good information. This figure was arrived from what Mac said about later transmissions and the 600W oil. Thank you. |
09-30-2013, 06:34 PM | #2 |
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Re: Restoration Qs...early 28 transmission case
I have had the cases welded and re machined so the clearances were correct, but making a thicker washer works too, if the case thrust surface is smooth. The clearances I shot for were around .006, and it worked fine. Too much and it makes a clatter when in first and second.
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09-30-2013, 06:49 PM | #3 |
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Re: Restoration Qs...early 28 transmission case
Center the cluster gear with the main drive gear,then measure with a feeler gauge the clearance on ends of cluster.After cleaning up any roughness on case,install steel shim washers until you have around .006" clearance.
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09-30-2013, 07:12 PM | #4 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
The front is OK....the rear has all the wear. With the gear to the front, the input shaft gear lines up with the cluster gear. |
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10-03-2013, 12:03 PM | #5 |
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Re: Restoration Qs...early 28 transmission case
I also just took one apart to re-build.. It is of the first style with the large reverse shaft collar assy, (Which I now need).. I had also ordered a new set of the brass washers from Bratton`s that were listed @ .077.. Just to check what mine were VS. the new ones, this is what I & one other guy got.. NEW- inner edge, .076, outer edge, .078.. The old ones were inner .088, outer, .086 ?????...Plus on the new ones the oil grove is VERY shallow & only stamped on one side..
Last edited by Fred; 10-03-2013 at 12:07 PM. Reason: Wrong #s |
10-03-2013, 12:34 PM | #6 |
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Re: Restoration Qs...early 28 transmission case
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Tom Endy |
10-03-2013, 01:12 PM | #7 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
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10-03-2013, 01:53 PM | #8 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
close, they are "punched" from sheet stock...there is a range of thickness on sheet stock ( + or - ) a few thousandth's for each gauge size. I'm sure, but haven't look in the book, they didn't make selective size washers. |
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10-03-2013, 02:04 PM | #9 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
better material than the TW's I have.....so I'll make new ones. I also plan on cleaning up the thrust surfaces, too make them smooth. |
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10-03-2013, 07:37 PM | #10 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
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10-13-2013, 04:06 PM | #11 |
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Re: Restoration Qs...early 28 transmission case
DJ & TOM, I have installed the cluster gear & the original washers .. The Dial Indicator shows .023 clearance on end play, moving the gear back & forth.. Is this to much or two little ?? I still ?? why Walts reproductions are smaller than the used originals ??
Last edited by Fred; 10-14-2013 at 11:08 AM. |
10-14-2013, 11:01 AM | #12 |
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Re: Restoration Qs...early 28 transmission case
Morning Fred,
Ya,....I think it's too much! I'm still of the opinion it should be about .006" to .008". Either do Tom's fix (pain in the fingers) or have some machine shop make a new one(s) for the front/rear, were ever the wear is. I'd replace my case but it's very unique in appearance,...I've never seen one quite like it and it fits the month of my car. |
10-14-2013, 12:35 PM | #13 | |
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Re: Restoration Qs...early 28 transmission case
Quote:
I think that is too much thrust clearance, I would try to get it at least under .010. I have no idea why Bratton's don't match up with the originals. Reproduction parts are always a problem. |
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