11 Inch Brakes

1941 - 1945, MB, GPW modifications, sugestions, and ideas, official MWO's and unofficial WWII field mods NO EBAY or COMMERCIAL SALES.
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ndnile
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11 Inch Brakes

Post by ndnile » Sun Mar 27, 2016 7:38 am

In the interest of age and safety I'm thinking of going to 11 inch brakes in the front.

I have 16 inch Slat Grill rims.

Herm has a note stating that his kit might not fit stock rims " Because of the large calipers and brackets ", so it doesn't sound like the larger hubs are an issue.

Can someone point me to a kit that has worked for them in the past?

Thanks, Doug
Doug
Sacramento Area
1943 Willys MB
1943 GPW-125334 (Sold)
1962 M170
1959 Willys Wagon


cjv-35
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Re: 11 Inch Brakes

Post by cjv-35 » Sun Mar 27, 2016 9:51 am

Believe one cannot go 11 inch brakes on front axle of MB/GPW for the steering arms will interfere with the 11 inch brake backing plates.

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Re: 11 Inch Brakes

Post by ndnile » Sun Apr 10, 2016 7:44 pm

Thanks for the reply CJV-35.

Is the MB front end much different from a CJ2A? There are articles about, and kits for sale for, putting 11" drums on a CJ2A and 3A jeeps. I believe these use backing plates from mid-70's CJ5's, and use non finned drums.

Cheers, Doug
Doug
Sacramento Area
1943 Willys MB
1943 GPW-125334 (Sold)
1962 M170
1959 Willys Wagon

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Re: 11 Inch Brakes

Post by ndnile » Tue Apr 12, 2016 6:05 am

Just to semi-complete this thread, I got the following reply from Jim Davis @ Willys Jeep Parts.
Note that Jim's kit uses the backing plates from the Willys wagon and truck. It would still be good
to hear from someone that has used the mid 70's CJ5 stuff.
Hello,

Yes it will. Your 16" wheels are no problem as the Willys Wagons, Trucks
and FC-150 and FC-170 all use the 11" brake system with 16" wheels.

You might have to grind some material off of the two steering arms that
attach to the steering knuckles in order for the brake drums to clear at
that spot.

We have sold dozens of the 11" upgrade kits to MB and GPW owners.
Doug
Sacramento Area
1943 Willys MB
1943 GPW-125334 (Sold)
1962 M170
1959 Willys Wagon

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tamnalan
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Re: 11 Inch Brakes

Post by tamnalan » Thu Apr 14, 2016 6:19 pm

Thanks! Please update again if you go through with it.
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Re: 11 Inch Brakes

Post by Old Pal » Thu Apr 14, 2016 10:47 pm

They will work. I had a set on my Gpw with no required modifications before I started a restore. I will be posting the entire kit for sale at some point.

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Re: 11 Inch Brakes

Post by CarloPel » Sun Nov 05, 2017 9:05 am

I just acquired a 42 GPW that has 11" drums installed. I do not know from what year/model, but they fit.

Here are pictures of steering arms on both sides. They just clear the backing plate by about 1/8"-1/4"
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CarloPel
Just acquired a '42 GPW46943

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Re: 11 Inch Brakes

Post by Joe Gopan » Sun Nov 05, 2017 9:11 am

Late 40's- early 60's 4WD WILLYS Trucks and Wagons. 11"X2"
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HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Re: 11 Inch Brakes

Post by ndnile » Sun Nov 05, 2017 9:13 am

Hi Carlo,

Thanks for the post. Which rims do you have?

I recently acquired a Willys wagon project. I'm now pondering the idea of upgrading the wagon's 11 inch drum brakes to disk, then hand the 11 inch drum brakes down to the MB. Sort of a 2-for-1 deal.
Doug
Sacramento Area
1943 Willys MB
1943 GPW-125334 (Sold)
1962 M170
1959 Willys Wagon

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Mark Tombleson
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Re: 11 Inch Brakes

Post by Mark Tombleson » Sun Nov 05, 2017 9:51 am

I think they bent the arms, but maybe grinding will work?

Image


I bought 4 and had to return the fronts as they did not fit. I did use a pair for the back. See here.


http://g503.com/forums/viewtopic.php?t=137830
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Re: 11 Inch Brakes

Post by artificer » Sun Nov 05, 2017 4:02 pm

What did you use on the front?
Very dangerous having larger/better brakes on the back v/s the front.
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TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

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Mark Tombleson
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Re: 11 Inch Brakes

Post by Mark Tombleson » Sun Nov 05, 2017 9:03 pm

That was long ago and far away, John... the MZ-1 was restored back to 9" brakes all around... some 15 years ago.
MB-NAVY-MZ-1 352625 - 07/20/44 (DOD est.)
U.S.N. 133818
2nd place Restored Class 2008 Portland Convention
MVPA Hall of Fame - 2013

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Re: 11 Inch Brakes

Post by CarloPel » Mon Nov 06, 2017 11:10 am

I know this is slightly off topic, but I just pulled the rear tires and am trying to determine what these 11" drums came off of.
11 drum back.jpg
11 drum back.jpg (167.36 KiB) Viewed 2655 times
Numbers read C10-AA9 or C10 - 4A9 ??
11 drum back 2.jpg
11 drum back 2.jpg (164.07 KiB) Viewed 2655 times
Numbers at bottom read 160 97
11 drum back 1.jpg
11 drum back 1.jpg (170.47 KiB) Viewed 2655 times
Letters read CANADA

If anyone recognizes these, I'd really appreciate it!
Thanks!
CarloPel
Just acquired a '42 GPW46943


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