Chevrolet transmission bearing numbers

[Jordan Baker]

Just following along and getting some parts ready for rebuilding my C15a transmission.

Is this the correct rebuild bearing and gasket kits?

http://www.parts123.com/parts123/yb....rt~A2~cadefefx

http://www.parts123.com/parts123/yb....rt~A2~cadefefx

[Grant Bowker]

Have you considered taking the old bearings to your local industrial bearing supplier and asking them for a quote? I would do this in Ottawa and expect to see a better price than a restoration supply house and typically either in stock or very quick delivery. Recently I did this for CMP 15 Cwt trailer wheel bearings, the supply house had a variety of suitable bearings at varying prices. They described some of them as more reliable for sustained high speeds and heavy loads than others. Several years ago, I also did this for C15A transmission bearings and all were either stock or next day availability.

[Jordan Baker]

I'll probably be doing that. I still have to open up the transmission first. Also the fillingstation doesnt have that item in stock.

Would that gasket set be the one Id need?

[Bob Carriere]

There are only 3 gaskets that I remember...... the top cover which I did with a ball peen hammer and exacto. The other two can be traced on gasket paper for the PTO cover and the round input shaft flange. I got a set of hole punches from PA to speed up the process. In a pinch you can use heavy craft paper used for grocery bags or large HD leaf bags from garden centers. I like to coat the craft or gasket paper with silicon between thumb and index..... just a smear.... and let it dry before assembly.

Check your individual bearings for pitting as they are nasty for holding water over the years of sweating on the inside or rain water by the shifter.

Is your rear cover in good shape with all the bolts intact??? Just curious but what is the rear cover made of..... white metal or cast iron...... make sure you loctite the bolts to the short drive shaft u-joint bolts on the yoke.

Have fun.

Bob C

[Grant Bowker]

Make your own from gasket paper of a thickness similar to what you take out (or a bit thicker to allow for some compression as you tighten the covers onto the case)? For the top cover, thickness isn't too critical. For the front and back covers you want to be close to original so that you don't add or remove much end clearance on the shafts. A variety of thicknesses should be available at any decent auto parts supplier, even some Canadian Tire stores....

It looks like Bob types faster than I do....

[Bob Carriere]

.... but not at work like you......

Got more parts for the grinder today.

Cheers

[rob love]

I would not recommend experimenting with papers other than gasket material for gaskets. The old cornflake box will make a better wick than a gasket...it will draw the oils out. Whatever you can't get form Canadian tire you will get from NAPA.

Re the PTO plate, most PTOs follow a very standard size. As such, the gasket is available from many sources. Being that the plate is fairly thin, you will want a reasonably thick gasket.

On a Universal carrier I am re-doing at work, I put all new gaskets when I rebuilt the transmission, and the PTO plate leaked. I ordered the plate for an Allison transmission and the gasket for an LSVW. Worked out fine. I could have just used RTV, but I wanted to do it old school.

In this day and age, you can also get away with RTV for the majority of applications, especially if you apply it properly. Run a bead around both gasket surfaces, let it set for an hour, then put them together. As Grant mentions though, don't use it if the retainer acts as part of the dimensions for the bearing preload.

[Bob Phillips]

Just a word about gaskets..new technology has led me to have some intricate gaskets laser cut at the local "makers" shop. This is still a work in progress but I am trying to make gaskets for 975 radial engine carbs. All you need to do is take a photo and the tech guru can adjust to appropriate size.Rough/experimental gaskets can be cut out of regular paper until you get it right. Then use correct gasket paper. Only hitch is the guru does not want to use certain types of paper ie with rubber or compounds that burn abd make noxious fumes. BP

[Alex van de Wetering]

Maybe the attached scans are of use for anyone wanting to make there own gaskets (please check size on normal paper first before using actual gasket paper!).
The brown coloured gaskets are the ones I made myself on gasket paper as suggested by Grant. The black ones are the ones that came from a set I bought (can't remember which supplier it came from).

I actually used the homemade ones, and ordered a set as a spare....just so I could continue with the gearbox.

Please note that there is some difference in the gasket for the prop shaft side between the ones I made myself and the one available commercially. The one I made myself was actually copied from the one that came from my gearbox when taking it apart.

Alex

[John Mackie]

The vast majority of deep grove ball bearings use METRIC sizes.

the last 2 digits of the indicate the bore size.

04 equals 20 mm bore
05 equals 25 mm bore
07 equals 35 mm bore and so on up to 99

60 62 63 and 64 are comonly used to replace older series numbers

62 series is the most common series.
60 and 618 are smaller section bearings , smaller balls.
63 and 64 series bearings are bigger, heavier.

6203 is the comon generator / alternator bearing 17 x 40 x12 mm.
6207 is a comon front gearbox bearing 35 x 72 x 17.

Z or 2Z = shields.
N = circlip grove.

there are pages of other suffixes .
I hope this helps,