need new throwout bearing retainer 57' - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rednek13x · 08-05-2012, 10:08 PM

My throwout bearing retainer on my 57' is got a nice grove in it from the old throwout bearing being rusted. I have looked on the internet and have come up empty. Where can i get a new bearing retainer plate?

Thanks

solidaxel · 08-06-2012, 12:45 AM

Clean that one up and try a new T/O bearing and see how it slides on the retainer

**mr48chev** · 08-06-2012, 09:24 AM

It honestly looks to be in better shape than the spline on the input shaft.

First I'd want to pull the side cover and take a look inside the trans though because if that trans was in the truck and assembled it looks like it may have been under water at some time. It may be just because it sat out in the weather for a long time though.

I'd suggest taking a cup brush on an angle grinder to it and buffing the rust off both the bearing retainer and the spline and then taking a strip of emery cloth to the collar that the release bearing slides on. Then spend some time cleaning the splines on the input shaft up.

Rednek13x · 08-06-2012, 07:53 PM

The problem with the pictures is you can not tell how bad the wear is. Transmission should be good inside it was ran a few years ago but parked cause the owner thought the clutch was going out. We just found out after dropping the trans the clutch is good, but the throwout bearing was rusted solid and was binding making the grinding.

oldcouple · 08-07-2012, 05:41 PM

Does it really matter if it has a grove in it? Won't the new parts take care of the wear? could always make a metal ring and weld it over the top of the worn area.

1project2many · 08-07-2012, 06:21 PM

That looks like a 4 speed?

You can buy a new retainer from Novak conversions. http://www.novak-adapt.com/catalog/sm420_parts.htm It's not cheap. But for a few dollars more they'll machine your input shaft and send you the seal and retainer together.

There's also Ebay and other sources... the trans is called an "SM420."

If you know someone with a lathe have it brazed and turned to the right diameter. I've done it before.

08-05-2012, 10:08 PM	#1
Rednek13x Registered User Join Date: Feb 2011 Location: Clear Lake, MN Posts: 329	need new throwout bearing retainer 57' My throwout bearing retainer on my 57' is got a nice grove in it from the old throwout bearing being rusted. I have looked on the internet and have come up empty. Where can i get a new bearing retainer plate? Thanks

08-06-2012, 12:45 AM	#2
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: need new throwout bearing retainer 57' Clean that one up and try a new T/O bearing and see how it slides on the retainer __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

08-06-2012, 09:24 AM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,711	Re: need new throwout bearing retainer 57' It honestly looks to be in better shape than the spline on the input shaft. First I'd want to pull the side cover and take a look inside the trans though because if that trans was in the truck and assembled it looks like it may have been under water at some time. It may be just because it sat out in the weather for a long time though. I'd suggest taking a cup brush on an angle grinder to it and buffing the rust off both the bearing retainer and the spline and then taking a strip of emery cloth to the collar that the release bearing slides on. Then spend some time cleaning the splines on the input shaft up.

08-06-2012, 07:53 PM	#4
Rednek13x Registered User Join Date: Feb 2011 Location: Clear Lake, MN Posts: 329	Re: need new throwout bearing retainer 57' The problem with the pictures is you can not tell how bad the wear is. Transmission should be good inside it was ran a few years ago but parked cause the owner thought the clutch was going out. We just found out after dropping the trans the clutch is good, but the throwout bearing was rusted solid and was binding making the grinding.

08-07-2012, 05:41 PM	#5
oldcouple Registered User Join Date: Nov 2011 Location: Winlock Wa Posts: 584	Re: need new throwout bearing retainer 57' Does it really matter if it has a grove in it? Won't the new parts take care of the wear? could always make a metal ring and weld it over the top of the worn area. __________________ Retired and too busy to work.

08-07-2012, 06:21 PM	#6
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,200	Re: need new throwout bearing retainer 57' That looks like a 4 speed? You can buy a new retainer from Novak conversions. http://www.novak-adapt.com/catalog/sm420_parts.htm It's not cheap. But for a few dollars more they'll machine your input shaft and send you the seal and retainer together. There's also Ebay and other sources... the trans is called an "SM420." If you know someone with a lathe have it brazed and turned to the right diameter. I've done it before.



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