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Old 05-03-2021, 11:13 AM   #1
JKY
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Default Transmission bearings

I replaced the 7118 and 7121 bearings in my transmission with the current production bearings from a major parts supplier. They were the Chinese bearings. 1,200 miles later they failed. Looking for a source to get good bearings that will last. Any help will be appreciated.

Thanks!
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Old 05-03-2021, 11:14 AM   #2
Brentwood Bob
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Default Re: Transmission bearings

Brattons
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Old 05-03-2021, 11:26 AM   #3
Greg Jones
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Default Re: Transmission bearings

As far as I know, the only thing available from most of the suppliers are still the junk bearings. However, a couple of months ago I purchased the 7121 bearings from, of all places, MAC's and they were the good 7121 bearings. I have no idea if they still have them but they might. The shorter bearing is hard to find, but you might call Steve Becker at Bert's Model A in Denver. He might even have some good used ones which are far preferable to the junk currently available.
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Old 05-03-2021, 11:53 AM   #4
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Default Re: Transmission bearings

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Originally Posted by Greg Jones View Post
As far as I know, the only thing available from most of the suppliers are still the junk bearings. However, a couple of months ago I purchased the 7121 bearings from, of all places, MAC's and they were the good 7121 bearings. I have no idea if they still have them but they might. The shorter bearing is hard to find, but you might call Steve Becker at Bert's Model A in Denver. He might even have some good used ones which are far preferable to the junk currently available.
I know Bert's had a limited supply of both bearings a couple of months ago. Not the same as listed in their catalog so ask for the "good ones" when you call Steve.
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Old 05-03-2021, 12:18 PM   #5
Tom Endy
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Default Re: Transmission bearings

Many of the suppliers were not even aware a switch was made. Those that are aware say that is all that is available. This is probably the greatest dis-service ever done to the Model A kingdom. It is not a question of they may fail, they will fail. I don't think anyone is making a quality bearing. See the attached.

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File Type: pdf Trans Roller Bearings-rev-Z.pdf (160.8 KB, 139 views)
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Old 05-03-2021, 03:18 PM   #6
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Default Re: Transmission bearings

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Thanks Tom, I saw this last year and couldn't find the good bearings so I got and installed what I could find. This is the result. Touring season and the touring car is down.

I'm hunting for cross numbers for these and not having a lot of success.
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Old 05-03-2021, 03:46 PM   #7
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Default Re: Transmission bearings

Quote:
Originally Posted by JKY View Post
I replaced the 7118 and 7121 bearings in my transmission with the current production bearings from a major parts supplier. They were the Chinese bearings. 1,200 miles later they failed. Looking for a source to get good bearings that will last. Any help will be appreciated.

Thanks!
I put the same off shore bearings in about 1,000 miles ago. What is the first sign that they are failing ? Feel like my cherished time machine has become a time bomb.
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Old 05-03-2021, 03:47 PM   #8
alexiskai
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Default Re: Transmission bearings

I'd be willing to take a crack at ID'ing substitute possibilities if someone can post the specs.
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Old 05-03-2021, 05:01 PM   #9
JKY
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Default Re: Transmission bearings

Mullet,
It was noise in the tranny. Came in all of a sudden. Rattled it home and into the shop. Pulling it tomorrow night (I hope).
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Old 05-03-2021, 05:16 PM   #10
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Default Re: Transmission bearings

Thanks for all this info on the trans bearings. I was going to rebuild my spare transmission
this coming month. I will see if I can cross these numbers for good bearings.
Thanks again, John
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Old 05-03-2021, 05:58 PM   #11
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Default Re: Transmission bearings

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Originally Posted by JKY View Post
Mullet,
It was noise in the tranny. Came in all of a sudden. Rattled it home and into the shop. Pulling it tomorrow night (I hope).
Thanks for the come back. Please share details and photos of the post mortem.
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Old 05-04-2021, 09:41 AM   #12
deuce5wndw
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Default Re: Transmission bearings

A 1947 cross reference I have says the RA-135 Bower is the same as B7118 along with 99026 Hyatt, the B7121 is RA-136 Bower and 99028 Hyatt. Us V8 guys are having the same problem! I'm putting together two transmissions and using nice used bearings even though it goes against everything I learned over the years! Hope this helps, Dale.

Last edited by deuce5wndw; 05-04-2021 at 09:54 AM.
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Old 05-04-2021, 09:42 AM   #13
deuce5wndw
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Default Re: Transmission bearings

A 1947 cross reference I have says the RA-135 Bower is the same as B7118 along with 99026 Hyatt, the B7121 is RA-136 Bower and 99028 Hyatt. Us V8 guys are having the same problem! I'm putting together two transmissions and using nice used bearings even though it goes against everything I learned over the years! Hope this helps, Dale.
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Old 05-04-2021, 11:02 AM   #14
1931 flamingo
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Default Re: Transmission bearings

Try Van Pelt or Michael at 3rd Gen Auto.
Paul in CT
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Old 05-04-2021, 11:43 AM   #15
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Default Re: Transmission bearings

Quote:
Originally Posted by jayvee34 View Post
Thanks for all this info on the trans bearings. I was going to rebuild my spare transmission
this coming month. I will see if I can cross these numbers for good bearings.
Thanks again, John
Please let me know what you find. I'm having difficulty getting some that are American made.
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Old 05-04-2021, 07:48 PM   #16
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Default Re: Transmission bearings

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Originally Posted by 1931 flamingo View Post
Try Van Pelt or Michael at 3rd Gen Auto.
Paul in CT
I think the ones at 3rd Gen are the same as the others, unless he has some old stock somewhere.
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Old 05-04-2021, 09:40 PM   #17
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Default Re: Transmission bearings

Quote:
Originally Posted by deuce5wndw View Post
A 1947 cross reference I have says the RA-135 Bower is the same as B7118 along with 99026 Hyatt, the B7121 is RA-136 Bower and 99028 Hyatt. Us V8 guys are having the same problem! I'm putting together two transmissions and using nice used bearings even though it goes against everything I learned over the years! Hope this helps, Dale.
JKY, I am going with the Bower bearings listed above by deuce5wndw. I am familiar with the Bower Bearings, I have used them when I rebuilt several
8" & 9" rear ends. They have always been quality bearings.

Thanks, John

Hope they have not moved off shore!!
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Old 05-04-2021, 09:50 PM   #18
alexiskai
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Default Re: Transmission bearings

There was another post awhile back that listed some different interchange numbers:
https://www.fordbarn.com/forum/showp...7&postcount=14

Quote:
Originally Posted by jrelliott View Post
The main shaft bearing #A7065 is 1-114119 SKF, 1 Side sealed 208SZ SKF and 1306 Federal. Counter shaft bearing short and Main drive gear bearing A7118-A is 24780 Timken, F93324 SKF, J24-1256 RHC, 93328 Hyatt, and J-24-1248 BCA Federal Mogal. Counter Shaft bearing long #A7121 is 94216 Hyatt, J201632 Bowers and J-24-1256 BCA Federal Mogal. Transmission Main Drive Gear Bearing #A7025 is 306P Timken, 1-114118 SKF, 1 side seald 306SZ SKF and 3208 ND
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Old 05-04-2021, 09:56 PM   #19
mercman from oz
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Default Re: Transmission bearings


Model A Ford Transmission Roller Bearings
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Old 05-04-2021, 10:26 PM   #20
alexiskai
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Default Re: Transmission bearings

This site lists a ton of cross-references for A7118:
https://www.yoyopart.com/oem/1136319...ml#interchange

And for A7121:
http://www.kakapart.com/oem/partscro...r-j241256.html

Maybe one of these is available.

Here's a vendor selling a part that interchanges with A7118:
https://wellertruck.com/inventory/pa...earing/bearing

Here's someone on eBay selling 2 units that interchange with A7121:
https://www.ebay.com/itm/BCA-Bower-J...-/233596345459

Last edited by alexiskai; 05-04-2021 at 10:41 PM.
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