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Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311660 Thu May 23 2019 04:26 PM
Joined: Jan 2019
Posts: 288
P
Philipj Offline OP
Shop Shark
Back to the parts challenge, I wonder if anyone can help finding these, since it is getting to be very difficult to find any information online...

1- Rear Wheel cylinders: GM 5300885 Casting #5300892

2- Rear Hub Seals: GM 3681195

3- Return Spring: GM 475511

4- Lower pin (4X) : GM

5- Lower lock (4X) : GM

6- Narrow pin (2X) : GM

7- Spring (2X) : GM

8- Small lock (2X) : GM

9- Axle Shaft to hub (aluminum) locking tab: GM

10- Axle Shaft to Hub gasket: GM 2310537

11- Rear differential cover gasket: GM 370448

12- Rear Wheel cylinder pinion kit: GM 3705288

13- Rear Wheel Hub - Nut lock plate: GM 473629

If anyone knows of any other parts needed to complete the job, I would appreciate the information. Thank you very much for your help here...


Attached Files
39 Rear Brakes - Copy.gif (64.45 KB, 176 downloads)
Last edited by Philipj; Wed May 29 2019 02:56 AM.

Philippe Jeanneau
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311668 Thu May 23 2019 05:45 PM
Joined: Mar 2002
Posts: 9,053
Master Gabster
When they came out with the hypoid design, they also made s new lubricant for it. the gear design literally squeezes the lubricant out from between the teeth so that is the stuff you want to use.

I would guess it would take a while to find a paper gasket for your 1 1/2 ton rear cover. RTV made for auto use will give you a more modern complete seal that will never leak.

Yes the axle gaskets are aluminum. You won't find new pins and you may not find the pin locks. The springs would be a rare find too. The best idea is to be as careful as you can taking it apart and only replace what is broken. Most wheel cylinders can be rebuilt. Mine were pitted so I had them done by a professional shop who installed stainless sleeves.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311674 Thu May 23 2019 06:21 PM
Joined: Oct 2015
Posts: 28
N
Wrench Fetcher
For the rear brake cylinders, try NAPA UP 3677. I found them to be identical to the rear cylinders in my '37 SD.

The rear wheel seal is a SKF 31870. If you need new locking plate for the axle nuts, the part number GM 473629 is a current number and is available from GMPartsDirect.com

Jim

Last edited by neonman; Thu May 23 2019 06:47 PM.

1935 QD 1.5 ton stake bed
1937 SD 1.5 ton stake bed
1944 MS 1.5 ton stake bed
1946 PW 2 ton stake bed
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311686 Thu May 23 2019 08:17 PM
Joined: Jan 2019
Posts: 288
P
Philipj Offline OP
Shop Shark
Hello Jim,

Thank you very much for the additional parts information, one less from the list.. On the cylinders, Raybestos WC3677 is the same thing and cheaper w/Amazon for $40.59 each. As for the oil seals, National 6358 $6.58 each with them also. Don't pay $40.00 each per seal as I did. Will reserve my comments for the abusive pricing. I am learning at a very high cost here...


Philippe Jeanneau
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311700 Thu May 23 2019 09:54 PM
Joined: Jul 2007
Posts: 530
'
Shop Shark
Phillipj ,

Spring - GM # 475511 - Dan's has ( 4 )
&
Gasket - GM # 3652258 - Dan's has ( 9 )

Are available GM NOS

@

Dan's GM Obsolete
Chinook , Montana
phone : 406 - 357 - 2615

If you need a new locking plate for the axle nuts, the part number is GM 473629

Dan's has ( 5 ) GM # 473629



Gasket - GM # 2310537 - Craig Motors has ( 7 )

is available GM NOS

@

Craig Motors
Napa , CA.
phone : 800 - 224 - 8111



Send an email to retired GM regional manager .
Bruce Bugay
in Virginia
email : BwBugay @ aol.com
phone : 804 - 752 - 6036

He buys & sells GM NOS parts .

Include the part numbers you are looking for & a description


If you find more GM part numbers.......I'll be glad to help you .


Ebay has ( 4 ) of the parts you are looking for

Go to ebay & in the search box........type.......the part #

PICS

https://i.postimg.cc/wvpntfQv/475511.jpg

https://i.postimg.cc/J0hTCbKP/2310537.jpg

https://i.postimg.cc/D0Yxv8MF/3652258.jpg

https://i.postimg.cc/zDdtScXM/5300885.jpg



NAPA wheel Cylinder

https://i.postimg.cc/BbDsW-LpL/NWMDC.jpg


Adler's , Brakes

http://www.adlersantiqueautos.com/articles/chevhuckbrakes.html


Huck Brake Locks on ebay - large & small

https://i.postimg.cc/vHZFLKFx/Locks.jpg


Jim Carter Parts

http://www.oldchevytrucks.com/cart/index.asp?cat2=10241&path=1934+%2D+1946+Truck+Parts%2FMechanical%2FBrakes%2FBrake+Shoes%2C+Springs&station=

MISC. PIC

https://i.postimg.cc/QdrXgbb2/brake-rods-zpsin3wggpw.jpg

Maybe this page will help you figure out some part numbers

http://www.gmpartswiki.com/getpage?pageid=223970

email : Joe Mendola in Arizona
Known as Mothertrucker @ stovebolt
Mothertruckeraz@aol.com

He may have some brake parts .

Check Out

http://www.bowtiebits.com/store/store_sub.cfm?Sub_Category_ID=1

Bow Tie Bits has Brake Shoe Return Springs

https://i.postimg.cc/jSz8cDm3/Brake-Shoe-Return-Spring-1939-1-one-half-ton.jpg



George
'54 3600

Last edited by '54 3600; Sat May 25 2019 08:09 AM. Reason: add

1954 3600
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311711 Thu May 23 2019 11:55 PM
Joined: Jan 2019
Posts: 288
P
Philipj Offline OP
Shop Shark
Hello George,

Thank you very much for the information and photos, will contact them tomorrow for pricing and check Ebay... I have also updated my list on top of this thread. In the meantime, I hope I can come up with the other part numbers...


Philippe Jeanneau
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1311825 Fri May 24 2019 06:32 PM
Joined: Apr 2007
Posts: 810
L
Shop Shark
Phillippe,
Why are you looking for all the those parts? Do you not have any parts to start with? To rebuild worn out brakes you will re-use the vast majority of the parts. If you are lucky you may not even need new cylinders, just the rubber cups. Perhaps I don't understand your situation or what you are trying to do.

Regarding the lubricant, any multiviscosity hypoid gear oil will work, including several you listed above as "out".

Enlighten me as to what you are doing,
Kent

Last edited by Lightholder's Dad; Fri May 24 2019 06:32 PM.

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1312104 Mon May 27 2019 07:01 PM
Joined: Jan 2019
Posts: 288
P
Philipj Offline OP
Shop Shark
Hello Kent,

Maybe I am overreacting a little since I never have dealt with Huck brakes before and I am expecting that most everything is beyond being usable due to its age... I have 2 new cylinders and seals. I suppose it is reasonable that I could re-use the outer nut lock and just get new axle gaskets and be Ok. Be Ok with all the pins, locks and springs... Just run them through a wire wheel and paint them with red oxide primer and assemble with never seize... Am I over simplifying it now? That would be the best case scenario, and I am hoping for that... On the other hand, I was trying to do some homework and find the part numbers for most of the stuff that I imagine would wear out, rust, or be a problem over time...That's where I'm at. Tomorrow I will start the disassembly process and will know for sure in which direction to go. Do you have any suggestions to avoid any pitfalls?


Philippe Jeanneau
Re: 1939 VB 1.5 ton truck Rear Brake job...
truckernix #1312105 Mon May 27 2019 07:32 PM
Joined: Jan 2019
Posts: 288
P
Philipj Offline OP
Shop Shark
Originally Posted by truckernix
When they came out with the hypoid design, they also made s new lubricant for it. the gear design literally squeezes the lubricant out from between the teeth so that is the stuff you want to use.

I would guess it would take a while to find a paper gasket for your 1 1/2 ton rear cover. RTV made for auto use will give you a more modern complete seal that will never leak.

Yes the axle gaskets are aluminum. You won't find new pins and you may not find the pin locks. The springs would be a rare find too. The best idea is to be as careful as you can taking it apart and only replace what is broken. Most wheel cylinders can be rebuilt. Mine were pitted so I had them done by a professional shop who installed stainless sleeves.


Hello there,

I understand that the Hypoid lubricant needed for the rear end is supposed to be mineral based...The only one that I have found that is Hypoid and (EP) is the Mobil XP 600. The others seem to be incompatible since they lack either one of the requirements... I Imagine it is acceptable to use RTV for the rear cover, but which specific brand or type really works?
As for the axle gaskets, GM 2310537, anything found so far is made of a fibrous material similar to most modern gaskets...If you can share photos of originals it would be great...

Axle gasket...

https://www.ebay.com/itm/2-Rear-Axl...hru-2-1-2-Ton-Truck-2310537/283413497887

Lock pins...

https://www.ebay.com/itm/NEW-1936-1...ud-Lock-Kit-8-Large-4-Small/233132540865


Philippe Jeanneau
Re: 1939 VB 1.5 ton truck Rear Brake job...
Philipj #1312111 Mon May 27 2019 08:37 PM
Joined: Apr 2007
Posts: 810
L
Shop Shark
Philippe,
Unless your brakes and axles have been buried in mud for a long time, I think you will find the hardware will be remarkably well preserved. Study the manuals so you don't break something disassembling the items and then wire wheel or media blast to clean them up. Since you live in FL you may want to paint them but some uncoated primers actually attract moisture like a sponge so be careful. Clear coat with spray can lacquer works pretty well for the protected area you are working in.

I may be wrong but I think you are mistaken regarding lubricant. Original instructions for the transmission and differentials of the older trucks noted that mineral oil lubricant was required. This is not correct for hypoid differentials and any modern hypoid gear lubricant should work. I hope that someone will correct me if I am wrong.

I would use Permatex "Right Stuff" to seal the axle caps. I don't think the gaskets you linked are the correct ones. Don't you have 10 studs on your rear axles? The Right Stuff is a rubber compound that works great without oil seepage and no gasket is required. It is somewhat adhesive and holds up much better than RTV. The lock pins you linked are what you are looking for. You have to bend them slightly to remove them but if you are careful and the previous mechanic has not ruined them already you may not need new ones.

Good luck,
Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
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