63 Throwout Bearing

[Joe L.]

Re: 63 Throwout Bearing

Can't promise 100% USA unless I call Fort Wayne Clutch myself. But here is their ad:

https://www.ebay.com/itm/Throwout-bearing-for-Chevy-Buick-Pontiac-etc-Part-614018-N1716-CC1705C-/191972700265

Possibly old stock. FWIW.

Joe L may wish to comment.

Larry

Larry-----

This is a USA manufactured bearing but it's aftermarket quality. Of course, that does not mean it should not be used.

[Harry S.]

Re: 63 Throwout Bearing

Got just about everything I need to do the job. I'm going to check the front bearing retainer for cracks as well as the front bearing.

All I can find is complete T10 gasket kits, anyone know where I can get a couple T10 bearing retainer gaskets?

Thansk

[Richard G.]

Re: 63 Throwout Bearing

My front bearing retainer was not cracked but was worn undersized on the snout. It can cause the clutch to not engage smoothly. I believe their are cast-iron replacements available that will last our lifetimes. The USA bearing didn't have any part numbers on the bearing, at least in the pictures. I am always suspect of Ebay pictures like this and every domestic manufacture I know of is proud enough of their product to identify it.

Below is the URL for a gasket set;

https://www.allstategear.com/Borg-Warner-T10-Gasket-Kit-p/t10-55.htm

Price: $4.71
Rick

[Joe L.]

Re: 63 Throwout Bearing

Got just about everything I need to do the job. I'm going to check the front bearing retainer for cracks as well as the front bearing.

All I can find is complete T10 gasket kits, anyone know where I can get a couple T10 bearing retainer gaskets?

Thansk

Harry------


GM part number was 591022 but long -since discontinued. Here's some for sale but looks like you can buy the whole gasket kit for less than one of these gaskets.

https://www.ebay.com/itm/NOS-Front-Cover-Input-Shaft-Cover-Gasket-Main-Gear-Gasket-1955-1965-Corvette/372212966562?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D987200d4523a4a5f9d1412bc7e103929%26pid%3D100675%26rk%3D1%26rkt%3D15%26mehot%3Dnone%26sd%3D372212966562%26itm%3D372212966562%26pmt%3D0%26noa%3D1%26pg%3D2380057%26brand%3DGeneral+Motors&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A78fa5c60-b33a-11ea-af40-74dbd180715d%7Cparentrq%3Ad3918c291720a69245268ae6fff5b0e8%7Ciid%3A1

[Harry S.]

Re: 63 Throwout Bearing

Thanks, ordered a set.

[Harry S.]

Re: 63 Throwout Bearing

Anyone have a 63 T10 main case on the bench? How big is the diameter for the front bearing? I have a Timken bearing and an NOS bearing and they are not the same dimensions. I'll post pictures and dimensions tomorrow.

Thanks

[Joseph S.]

Re: 63 Throwout Bearing

Harry, The 63 T10 front bearing is T6307NR.

[Joe L.]

Re: 63 Throwout Bearing

Anyone have a 63 T10 main case on the bench? How big is the diameter for the front bearing? I have a Timken bearing and an NOS bearing and they are not the same dimensions. I'll post pictures and dimensions tomorrow.

Thanks

Harry-------


What are the part numbers of the NOS and Timken bearings you have? How much difference is there in OD?

[Harry S.]

Re: 63 Throwout Bearing

Some pictures. The part number on the original bearing is written on the box. 47207CU is stamped on the bearing. Guess I was duped?

IMG_1167.JPG

IMG_1168.JPG

IMG_1170.JPG

IMG_1181.JPG

IMG_1182.JPG

IMG_1184.JPG

IMG_1185.JPG

IMG_1186.JPG

[Harry S.]

Re: 63 Throwout Bearing

Harry-------


I wouldn't let the the China source of the bearing dissuade me from using it. As I mentioned, this is the OEM-quality bearing. It's almost certainly manufactured by a Tier 1 supplier to the automotive industry. They manufacture very high quality parts. In fact, VERY large numbers of such components are part of brand new US-built cars, including Corvettes. So, if one is opposed to Chinese-manufactured components, don't buy a new car (or, an iPhone).

The other bearing, GM #19312070, I believe is manufactured in the US. However, it's aftermarket quality. For me, if I have a choice of an aftermarket quality, US manufactured part or a Chinese manufactured, OEM quality part, I'll go with the OEM quality part every time regardless of where it's manufactured.

By the way, when buying other aftermarket or OEM roller or ball bearings always favor a Japanese-manufactured bearing. Those bearings are the best in the world. Somewhat hard to find, though, and usually expensive.

The original T-10 front bearing was GM #954998. This was discontinued in May, 1964 and replaced by GM #907683. The latter was discontinued in July, 1965 and replaced by GM #907764 which was discontinued in September, 1967 and replaced by GM #907930. The latter lasted until July, 1989 when it was replaced by GM #12336440. Alas, it was discontinued without supersession in March, 1999.

Aftermarket replacements are available under National or Timken #307L

By the way, the last two 1964-74 Muncie front bearings I bought from GM, GM #907572, were made in Japan. I was absolutely thrilled when I saw that.

Joe, 307L or 207L ?

Thanks

[Joseph S.]

Re: 63 Throwout Bearing

Harry use the Timken 307L. The 207L is for a 3 speed trans.

[Joe L.]

Re: 63 Throwout Bearing

Joe, 307L or 207L ?

Thanks

Harry------

After seeing the 2 bearings you pictured and being somewhat unfamiliar with T-10 transmissions, I did a lot more checking. In fact, it required quite a bit of time. Certainly, either the GM part numbers I provided OR the Timken part number I provided had to be incorrect. They both could not be correct. While the GM bearing you received could have been mis-boxed, based on the part number embossed on the bearing (i.e. 47207) it does jive with the two hand-written part numbers on the box.

At first, I started to believe that the GM catalog information was incorrect. That's highly unusual but it can happen. However, if it was incorrect, it was incorrect from the beginning (i.e. 1963) and carried right through to the very end of availability of the bearing. That would be HIGHLY UNUSUAL, to say the least.

From what I've now found, it seems that the 1963 T-10 case was different than earlier (or, later) T-10 cases. We, of course, know that the 1963 front bearing retainer was smaller than other T-10's. That got me thinking, if the retainer was smaller, maybe the bearing was, too. Well, it turns out that it was. The earlier T10 maincases, including aluminum, apparently had a front bearing orifice of 3-1/8". The 1963 maincase apparently had a bearing orifice of 2-13/16", the same as 3 speeds of the period. So, if you have a T-10D maincase, as you should if original, I expect the GM bearing you have will be the correct one.

So, in this case, its Timken and the other bearing manufacturers that apparently have it wrong. This is further substantiated by the fact that Timken and National specify the 307L bearing for 1957-62 T-10's. 1957-62 T-10's do not use the same input bearing as 1963. Apparently, someone thinks that 1957-62 T-10s are the same as 1963. But, they're not.

[Harry S.]

Re: 63 Throwout Bearing

Harry------

After seeing the 2 bearings you pictured and being somewhat unfamiliar with T-10 transmissions, I did a lot more checking. In fact, it required quite a bit of time. Certainly, either the GM part numbers I provided OR the Timken part number I provided had to be incorrect. They both could not be correct. While the GM bearing you received could have been mis-boxed, based on the part number embossed on the bearing (i.e. 47207) it does jive with the two hand-written part numbers on the box.

At first, I started to believe that the GM catalog information was incorrect. That's highly unusual but it can happen. However, if it was incorrect, it was incorrect from the beginning (i.e. 1963) and carried right through to the very end of availability of the bearing. That would be HIGHLY UNUSUAL, to say the least.

From what I've now found, it seems that the 1963 T-10 case was different than earlier (or, later) T-10 cases. We, of course, know that the 1963 front bearing retainer was smaller than other T-10's. That got me thinking, if the retainer was smaller, maybe the bearing was, too. Well, it turns out that it was. The earlier T10 maincases, including aluminum, apparently had a front bearing orifice of 3-1/8". The 1963 maincase apparently had a bearing orifice of 2-13/16", the same as 3 speeds of the period. So, if you have a T-10D maincase, as you should if original, I expect the GM bearing you have will be the correct one.

So, in this case, its Timken and the other bearing manufacturers that apparently have it wrong. This is further substantiated by the fact that Timken and National specify the 307L bearing for 1957-62 T-10's. 1957-62 T-10's do not use the same input bearing as 1963. Apparently, someone thinks that 1957-62 T-10s are the same as 1963. But, they're not.

Joe, thank you for all the time and effort. Yes, it's a T10D-1 main case. It's the one that came in the car. I'll use the GM one and send the Timken back.

Again, thanks, stay safe and well.

[Harry S.]

Re: 63 Throwout Bearing

207L on the right. Fits like a glove. Only difference is ball bearing count. As soon as I get the carb. back on and running the trans will come out.

IMG_1211.JPG

IMG_1212.JPG

IMG_1215.JPG

[Joe L.]

Re: 63 Throwout Bearing

207L on the right. Fits like a glove. Only difference is ball bearing count. As soon as I get the carb. back on and running the trans will come out.

[ATTACH=CONFIG]99785[/ATTACH]

[ATTACH=CONFIG]99786[/ATTACH]

[ATTACH=CONFIG]99787[/ATTACH]

Harry-----


Did you decide to not use the Delco bearing?