WC 63 propshaft failure

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Mark 1
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WC 63 propshaft failure

Post by Mark 1 » Tue Apr 23, 2019 6:08 am

Hi all.

I have just picked up a 1943 WC63 that was totally restored in 2017, very nice it is too. I collected it Sunday and drove it home 70 miles with no problems, indeed the more miles I put on the better it ran as its only done 363 miles since the rebuild. Later that day I drove over a hole in my field that’s about 30" deep by about 10’ long [ my Jeep fits in it ] testing the articulation etc, a few creaks and groans then the prop from the back of the transfer box where the parking break is to the junction on the middle axle [ driving to the rear axle ] failed, the spline came out of the housing which is now scrap as it has a split in it. The spline looks like it’s been in a good 3/1/4 “, there is 4.5” of internal space in the housing. The UJ's all are free and move easily.

Maybe it's too short? The spline sliding out too far and Pop. I was going V slow in 2nd.
I removed the prop then I had a metallic grindy type noise that turned out to be the UJ between the G-box and Transfer box rubbing on the body plate above it, I bent that up with a crow bar to stop the noise, but I am confused why that should start to rub when it had not before ?

Chap I bought if from was most upset, he is coming down tomorrow with anther prop to replace it, what concerns me is why this happened, another have any ideas?

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Re: WC 63 propshaft failure

Post by Ben Dover » Tue Apr 23, 2019 6:24 am

A lot happens to some MV's over 75 years, your 6X6 WC is crying out to you, expect more issues due to wear and tear. The age of the vehicle should be a consideration when testing its' limits.
Be careful. Did you get any extra Torque Rods with your WC?
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Mark 1
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Re: WC 63 propshaft failure

Post by Mark 1 » Tue Apr 23, 2019 7:57 am

Thanks Joel[ ? ]

No torque rods, its like new underneath and on top, new UJ's all round, but you could be correct, 76 year old prop housing, poss a hairline crack in there and a bit of a lumpy road, and pop!
TBH the hole is not very severe for a truck of this size, will report back when new prop is on.

cheers

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Re: WC 63 propshaft failure

Post by Ben Dover » Tue Apr 23, 2019 9:26 am

Replacement torque rods are at a premium, they can and do pull apart at the ends, bad things happen when torque rods fail.
2011 MVPA PIONEER AWARD - MVPA #1064
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
LIFE MEMBER AM LEGION-40/8-DAV
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Re: WC 63 propshaft failure

Post by Mark 1 » Wed Apr 24, 2019 9:07 am

Update the reason for the propshaft failure was the chap I bought it from when he owned it he had removed various props to investigate a vibration. He accidently fitted the middle prop to the front and Vice Versa.
He came down today with various propshafts and parts and now they are in the correct positions, repaired the front one [which was in the middle position] re fitted all and tested [carefully ] Twice over my bomb hole, all good :)


motto
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Re: WC 63 propshaft failure

Post by motto » Wed Apr 24, 2019 10:59 am

It is usually not necessary to replace the complete torque rod assembly on a WC 62/63, Dodge supplied the ball ends as a spare and these can be pressed out and replaced. Usually the rod itself is quite ok, it's just the ball ends that get sloppy.
Strangely, the General didn't seem to supply the same part as spare for the CCKW/DUKW. If so I am unaware of it.

David

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Re: WC 63 propshaft failure

Post by Ben Dover » Wed Apr 24, 2019 1:12 pm

I do have a set of NOS ends for early G-508 Torque Rods and they are under guard. Have been looking for more for 30 years.
I do have a Part Number for the ends on file somewhere. :wink: :wink:
2011 MVPA PIONEER AWARD - MVPA #1064
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
LIFE MEMBER AM LEGION-40/8-DAV
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Re: WC 63 propshaft failure

Post by johnseidts » Wed Apr 24, 2019 8:08 pm

I am working on a WC52. We had a driveshaft end (broached) which had been split like a banana, and carefully welded back together. The welds were satisfactory, even good, and probably would have been fine. I replaced it with another end I had on hand. I am sure with enough GI force, anything on the WC’s can be broken.
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dpcd67
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Re: WC 63 propshaft failure

Post by dpcd67 » Fri Apr 26, 2019 12:49 pm

Torque rod ends are easy to get; I got one recently from Vintage Power Wagons. And I got a frame mount too. Had one wallered out.
I would not run a welded prop shaft.
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dpcd67
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Re: WC 63 propshaft failure

Post by dpcd67 » Thu May 02, 2019 10:21 am

Vintage Power Wagons also has the torque rods for WC63; $75.
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