3/4 Ton, Spicer Hub, Allen Bolt Washer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

4x4Poet · 10-20-2005, 10:49 PM

For my '72 3/4 ton, 4x4 K20 front D44 Spicer Hubs, I need the little, thick washers for the allen bolts that hold the locking hub to the wheel hub. Hardware store washers have too large O.D. The local dealer says the washers were once available separate from the allen bolts, but have been discontinued since '94. GM part number:

3979606

Not available in my local wrecking yards. Up here, 3/4 tons either don't get wrecked or the 3/4 ton axles are swapped onto another truck. I'm trying to avoid canibalizing my '71 K20 burb or turning down (lathe) some washers.

What have you folks done?

krue · 10-20-2005, 11:32 PM

Either try some of the other dealers (to see if they may have it in stock) or have a machine shop make what you need.

Americanrider · 10-21-2005, 02:03 AM

If you know the size inner & outer then call Tacoma Screw. They should have it and the call is toll free.

http://www.tacomascrew.com/locations.htm

Dean · 10-21-2005, 08:56 AM

I bought stainless bolts and washers for both of my K20s, but I can't seem to remember where I got them. They were identical to the originals just stainless. I'll keep thinking.......

Erl · 10-21-2005, 09:36 AM

Try mcmaster.com

MrBinAz · 10-21-2005, 06:48 PM

You may be in luck......sometime ago I swapped over to MM hub's and may still have the old spicer equipment buried in my garage somewhere.
I'm at work now and will check when I can.

<<<<<finger's crossed

4x4Poet · 10-22-2005, 05:22 AM

Quote:

Originally Posted by MrBinAz

...I'm at work now and will check when I can.

<<<<<finger's crossed

Thanks. That's very kind of you. But I don't need something sent to me. I can resize some washers, if need be. I posted to see whether there is a simple solution such as an overlooked parts source.

Appreciate the thought, though.

nu2-72 · 10-22-2005, 06:01 PM

type the number into the search engine of your choice. I just bought several dozen.

4x4Poet · 10-23-2005, 01:21 AM

I googled the GM part # prior to starting this thread. Guess I need to improve my search skills. I'll give it another try.

nu2-72 · 10-23-2005, 10:21 AM

Sending you a PM. If this is not helpful,let me know.

4x4Poet · 10-28-2005, 02:43 AM

Spicer hub gaskets:
When I removed my pickup's Spicers, there were no gaskets. Just silicone. Auto parts stores (NAPA, Carquest) had no listing on computer or in books.

So, I called the local dealer on what gaskets GM calls for on these Spicer hubs. Parts said they take metal gaskets that cost $10 EACH special order:
3979441

Is that correct? Do both sides of the extention housing call for metal gaskets? The extention housing is the cylindrical body that goes between the wheel hub and the chrome Spicer dial housing.

I have some gasket paper ($1.32

), but I would like to eventually use metal gaskets where called for since they would withstand the torque and twisting better than paper just as the rear FF axle metal gaskets do. I also think metal gaskets with Gasgacinch would seal better.

Thanks for all the help on this thread. I've just about got Spicer's down. Disassmbled them today using the Chevy Service Manual.

nu2-72 · 10-28-2005, 10:24 AM

Metal gasket is $8.53 and paper is $2.13 at the dealer.
Metal to the axle side and paper to the chrome hub side.

nu2-72 · 10-28-2005, 10:28 AM

ttt

nu2-72 · 10-28-2005, 08:47 PM

This is what you would be looking for.

4x4Poet · 10-29-2005, 06:15 AM

Thanks, again, Nu2-72. Both my 3/4 ton K20s came with no gaskets, so I've never known if they should have metal and I hadn't had to regrease them till now.

That IPB helps, too. But, did you notice that the two gaskets don't say whether they are metal or paper? And the cap paper gasket, as depicted, looks just as thick as the metal gasket.

nu2-72 · 10-29-2005, 10:15 AM

You are correct, they do not say what the materials are. But I know from tearing mine down and I have purchased several of each. I believe the purpose of each is that the metal gasket is between two solid steel parts and will compress enough to seal. The paper gasket is between the steel spacer and the potmetal Chrome hub. The hub has cutouts in the rear and paper will seal better on a non flat or irregular surface.
I am in the process of building my 72 K-20 with NOS parts. Took a while to locate some things so I put together these lists. Helped me alot. You will just have to trust me here.
If there is anything I can do to help, let me know.

10-20-2005, 10:49 PM	#1
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	3/4 Ton, Spicer Hub, Allen Bolt Washer For my '72 3/4 ton, 4x4 K20 front D44 Spicer Hubs, I need the little, thick washers for the allen bolts that hold the locking hub to the wheel hub. Hardware store washers have too large O.D. The local dealer says the washers were once available separate from the allen bolts, but have been discontinued since '94. GM part number: 3979606 Not available in my local wrecking yards. Up here, 3/4 tons either don't get wrecked or the 3/4 ton axles are swapped onto another truck. I'm trying to avoid canibalizing my '71 K20 burb or turning down (lathe) some washers. What have you folks done? __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

10-20-2005, 11:32 PM	#2
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer Either try some of the other dealers (to see if they may have it in stock) or have a machine shop make what you need. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

10-21-2005, 02:03 AM	#3
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer If you know the size inner & outer then call Tacoma Screw. They should have it and the call is toll free. http://www.tacomascrew.com/locations.htm

10-21-2005, 08:56 AM	#4
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer I bought stainless bolts and washers for both of my K20s, but I can't seem to remember where I got them. They were identical to the originals just stainless. I'll keep thinking.......

10-21-2005, 09:36 AM	#5
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer Try mcmaster.com __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

10-21-2005, 06:48 PM	#6
MrBinAz Registered User Join Date: Dec 2004 Location: Where the hell is Bullhead City, Az? (USA) Posts: 55	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer You may be in luck......sometime ago I swapped over to MM hub's and may still have the old spicer equipment buried in my garage somewhere. I'm at work now and will check when I can. <<<<<finger's crossed __________________ -----the fleet----- '72 K20 Chevy Suburban '72 Datsun 510 (vintage racer) '89 Honda Civic Si HB '89 Honda Civic Dx HB '08 Honda Element EX-P '78 Honda Express (50cc. pit-ped) pix here

10-22-2005, 06:01 PM	#8
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer type the number into the search engine of your choice. I just bought several dozen. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

10-23-2005, 01:21 AM	#9
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	I googled the GM part # prior to starting this thread. Guess I need to improve my search skills. I'll give it another try. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. Last edited by 4x4Poet; 10-23-2005 at 01:22 AM.

10-23-2005, 10:21 AM	#10
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer Sending you a PM. If this is not helpful,let me know. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

10-28-2005, 02:43 AM	#11
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	'Nutha "Allen Bolt" Spicer Locking Hub Question... Spicer hub gaskets: When I removed my pickup's Spicers, there were no gaskets. Just silicone. Auto parts stores (NAPA, Carquest) had no listing on computer or in books. So, I called the local dealer on what gaskets GM calls for on these Spicer hubs. Parts said they take metal gaskets that cost $10 EACH special order: 3979441 Is that correct? Do both sides of the extention housing call for metal gaskets? The extention housing is the cylindrical body that goes between the wheel hub and the chrome Spicer dial housing. I have some gasket paper ($1.32 ), but I would like to eventually use metal gaskets where called for since they would withstand the torque and twisting better than paper just as the rear FF axle metal gaskets do. I also think metal gaskets with Gasgacinch would seal better. Thanks for all the help on this thread. I've just about got Spicer's down. Disassmbled them today using the Chevy Service Manual. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

10-28-2005, 10:24 AM	#12
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer Metal gasket is $8.53 and paper is $2.13 at the dealer. Metal to the axle side and paper to the chrome hub side. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide Last edited by nu2-72; 10-28-2005 at 10:32 AM.

10-28-2005, 08:47 PM	#14
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer This is what you would be looking for. Attached Images __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

10-29-2005, 06:15 AM	#15
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer Thanks, again, Nu2-72. Both my 3/4 ton K20s came with no gaskets, so I've never known if they should have metal and I hadn't had to regrease them till now. That IPB helps, too. But, did you notice that the two gaskets don't say whether they are metal or paper? And the cap paper gasket, as depicted, looks just as thick as the metal gasket. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

10-29-2005, 10:15 AM	#16
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Re: 3/4 Ton, Spicer Hub, Allen Bolt Washer You are correct, they do not say what the materials are. But I know from tearing mine down and I have purchased several of each. I believe the purpose of each is that the metal gasket is between two solid steel parts and will compress enough to seal. The paper gasket is between the steel spacer and the potmetal Chrome hub. The hub has cutouts in the rear and paper will seal better on a non flat or irregular surface. I am in the process of building my 72 K-20 with NOS parts. Took a while to locate some things so I put together these lists. Helped me alot. You will just have to trust me here. If there is anything I can do to help, let me know. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

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