Chevrolet transmission bearing numbers

[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

[rob love]

Dowel stock would never last. The little needle bearings found in many transmissions and transfer cases are very hardened. They are also, as far as I know, unique to their applications.

[Bob Carriere]

.... the last set of treads on this C1207 bearing was NEVER resolved to my satisfaction......

I need to search my photo librabry...... but I am stoned on pain killer,,,,,so somehwere before they completely wear off and I take the new batch I will try to find that illusive info.....

From waht I recall the bearing guy telling me is that everyone of the suffix or prefix to a bearing number means something has to how it is constructed or inrtended for.....

For the sake of the hobby we need to sort this one out.

Don't roll away on a loose bearing...... getting a shot of something into my hiop joint tomorrow....so may be much better or much worst.....

cheers

Bob C


a.k.a. the loose bearing guy!!

[rob love]

Bob
The solution is easy....buy Fords. The Ford name is much more popular and the aftermarket caters to either NOS, equivalent, or modern reproduction parts.

[Lynn Eades]

Phil, Bob, and others. Here are some old numbers : (the ones Phil mentioned in post #4)
1. G.M. bearing # 141854 crosses over to:
Hyatt 93424
RBC RA 143
Bower 28-1248
SKF F93424

2. a 3307 (is a very common bearing found under 6307)
It crosses over to:
Timken BRM 035
Hoffman 335
R&M MJ35
SKF6307
Norma- Hoffman MT307, 307.
MRC 307m,307r, 307s.
New Departure 1305, 3305

3. The Hyatt C1206 crosses over to
Bower s1206
R&M B8372
SKF FC1206 and F-1206-TS

4. The Hyatt C1207 crosses over to;
Hyatt 1207 TS
Bower S-1207
R&M 8371
SKF FC1207, I-130508

These cross references come from a post WWII Australian Army bearing interchange book. If you have a pile of ex Australian bearings with Australian Army part numbers (eg.BG-insert your number-Z) Then I can help I.D. them
The book also lists R.A.O.C. numbers.
Not a modern interchange but another angle.

The following is just some bearing blurb for those who might be interested

Some bearings like the 3307 are very common today (as a 6307) They are available in Std, High load (extra balls- Slot filled) with a single or double tin shield or with single or double rubber seals. There are also variations of these bearings that have a circlip groove.

If you have a ball bearing with 4 digits and it starts with a 6 (eg 6203) it means it is a metric (sized) std. type annular grooved ball bearing. The last 3 digits identify the size.

Some bearings can be sized different from std. This means the inner or outer diameter is less or more than std. to allow for a slide fit assembly, or indeed a looser fit for operation at high temperatures (an example: C3)

Bored yet?

[Bob Phillips]

As of today I can get the following bearings from my local jobber;
GM # 903209 crosses to 6209J cost $64 CDN frt mainshaft
GM#901307 crosses to 307J cost $134 cdn rr mainshaft

You might to better to check EBay for NOS bearings at this price
caged pilot bearing 141854 is discontinued

[rob love]

I rarely buy from a jobber, or NAPA any more. Rock auto in the US is often my go to, along with summit racing and of course, ebay and amazon.

Just replaced the front rotors on my truck along with all the wheel bearings and new seals (even a spare pair of seals for next year) and spent less than I would have for just one rotor here. I am happy to buy local, but they have to be at least a little competitive.