Chevrolet transmission bearing numbers

[Bob Carriere]

Hi Bob

Just found you PM.

On all the bearings for my cab 11...... the original part numbers and modern equivalent were only used to confirm we had the right ones after we ordered by size alone.

I made use of Industrial Solutions on Ottawa but understand that GBS, General Bearing Services, work on the same basis. Bring the parts in and the measure the ID...OD...thickness and use a modern search engine to identify the makers and where they are in stock.....location can affect the price with shipping.

Of all the bearings on my cab 11 the only one that was and is still a problem to locate is the bottom rear most bearing C 1207....... fortunately it is located low in the gear box and usually swims in oil and most are still good. It seems that there are few if any modern equivlent that will match the ID and OD.

Note that on some modern bearings they have a sealed neoprene facing ....some on one face some on both....... depending on the location they can be made/modified to suit the gear box location by carefully cutting the neoprene seal on the face of the bearing that is facing to the inside and let the gear oil run into the bearing race.

One more caution on the gear box rebuild...... on the back side.... where the output yoke is located..... the original oil seals have a sheet metal washer design like mikey mouse ears.... so the bolts actually go through the seal edge....... as far as I know the original desing is NO longer made but if you carefully dismantle the used original seal you can salvage the sheet metal that will hold the new seal in place. Use lock tite on these bolts so they will not back off and be sheared off by the rotating Yoke....... Similarly when installing the U-Joint to the Yoke use self locking nuts and lock tite to make sure the yoke bolts will not work loose and shear the rear cover off the tranny.

Lock tite can be easily overcomed with a small propane torch or an electric paint stripper gun if open flame is not your favorite trick.

Bob...input shaft is on the way.....with the bearing.

Been slowed down with a broken ankle which has finally healed well but left me with a hip bursitis...... bitch!!!!!

Just call me Hoop a long...........

[Bob Phillips]

Many thanks to all leads and advice re trany bearings and overhaul.
I had hoped to purchase bearings on mass with current part numbers but that may not be possible. The caged bearing between top shafts is now discontinued though I have a great local parts store who are trying to source it. I have now had 4 transmissions apart to try and get good, still in the oil parts with limited success. Thirty years ago good used transmissions and engines were plentiful - not so much anymore. So Bob I eagerly await the input shaft- sorry to hear yer busted up!
Last question does anyone have an opinion oin whether the inside of the case should be recovered in the primer coloured oil resistant paint ( is it lead-oxide type paint?) or is that not necessary??
Thanks...B.P.

[rob love]

Bob

If you are talking about the rear countershaft bearing, the part number I list above is readily available and reasonably priced. Plenty on ebay: http://www.ebay.com/p/m1207tv-linkbe...ing/1801793647

Of course, you will want to confirm the dimensions before ordering.

[rob love]

I believe the red paint found inside gearboxes was glyptol, used to seal porous castings. If the case was boiled clean, no reason POR-15 wouldn't work.

[Bob Phillips]

Special thanks to Rob...as a dedicated Ford man I appreciate your input re Chevy parts!!!! Will post numbers for any parts I can purchase...B.P.

[Bob Carriere]

I don't think that 1207 bearing will fit.....

The GM tranny bearing as SOLID STEEL ( bearing race) insert that slipsover the countershaft..... and is not included...... when I sourced the same bearing in Ottawa the insert from the old bearing was a few mil to big or too small and would not fit the counter shaft.

If this is an issue I will go back to my parts box and measure in mil. for accurate slack........ I still think it not readily avaialble in North America.... nbow in Europe I believe Alex or someone else fround a suitable replacement.

Cheers

PS......Will look for pictures of original bearing in my files.

[rob love]

Bob: I am always up for a part number challenge. We'll see how Bob P does in his quest, and if it doesn't work out, then we'll go the measurement route.

For some reason though, I think we went this route on the forum a couple years ago. Was it for this bearing?

The GM part number shows on this list of cross reference as well, which has a hundred numbers for that bearing: https://mibearings.com/index.php?mai...ucts_id=281388

And of course, keeping an eye on ebay, or searching google for the Chevy part number should also get you there.

[Bob Phillips]

I searched the MLU postings for bearing data and was able to find reference to the caged pilot bushing only. While the number crosses with a couple of different suppliers it is officially discontinued. I am sure there are some out there yet as, so far I have had no great difficulty in getting all brake parts, seals etc B,P,

[rob love]

Some of the crosses I get for GM141854 are Timken J281248 and Bower possibly Bower 93424

Both are presently on ebay starting at 9.99
http://www.ebay.com/itm/J281248-BOWE...4AAOSwpLNX99P0

http://www.ebay.com/itm/NOS-Bower-Ro...VWDrOm&vxp=mtr

In fact, if you run the 93424 number on ebay you will come up with quite a number of them, including made by Hyatt, who is listed in the GM book as the cross reference.

http://www.ebay.com/sch/i.html?_odkw...ARING&_sacat=0

[Bob Phillips]

Hi Rob
Great find , esp as my local jobber says all related interchange numbers are no longer available. Perhaps another alternative would be to use correct length &dia pieces of dowel stock with no cage..my '76 jeep trany was put together in that fashion...wont hear about rest of bearings until next week BP