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EFV-8 Club Forum / General Ford Discussion / Jacking on a Banjo

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Robert/Texas

09-14-2018 @ 6:41 AM

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My '37 has a bumper jack in the compartment under the back end of the trunk. I've never tried to use it but I am quite sure it was original equipment.

MGG

09-06-2018 @ 4:05 PM

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I should have asked this a long time ago - Does Ford say in any of the earlier literature where to place the jack? Later on they furnished a bumper jack. When did they start doing this, 1949??

Bill E Bob

09-06-2018 @ 9:32 AM

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And I thought it had something to do with 5 strings

cliftford

09-06-2018 @ 7:19 AM

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What a can of worms. JM, your last post says it all.

09-06-2018 @ 7:05 AM

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With additional respect to the engineers who have previouly posted, in the 60 years I've been working on, and driving these early Ford V8 vehicles, I've not seen any damaged front or rear axles from jacking these vehicles up at the center of their axles, and I have also occasionally jacked my own vehicles from the axle centers with no damage to report. However, if you have concerns about doing this, then don't. There are many other locations on these vehicles that can be used to jack them up, some being safer than others. Just use common sense.

John

TomO

09-06-2018 @ 6:40 AM

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After reading MGG's post I remember why I struggled to get a "C" in Theory and Applied Mechanics in college.

The forces are applied as MGG stated, but I think that the material and design of the axle housings is strong enough to handle the forces present when the car is jacked up by the differential housing. If they were not, many of the cars from the 1950's would have bent housings. It was common practice to jack the car up this way to clean the white walls. The automatic car washes reduced the number of hand washes on the later cars.

Tom

kubes40

09-05-2018 @ 2:24 PM

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I think the fact that millions of times of jacking these cars up by the center section without damage is "test" enough.

Mike "Kube" Kubarth

ford38v8

09-05-2018 @ 11:00 AM

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With due respect for all your considered Engineering opinions, when was the last time anyone heard tell of an axle or housing or center section being damaged from jacking at the center? Ford, Brand X, or anything in between.

Alan

51woodie

09-05-2018 @ 10:33 AM

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Thank you all for your comments. From now on, it's jacking on spring mounts for me. A good point about jacking on the front axle as well. Sometimes the easiest way is not the best way.

40cpe

09-05-2018 @ 6:18 AM

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I'm no engineer, but I agree that jacking from the center does place more stress on the assembly. Has anyone considered the materials and design of the rear to determine if it has the strength to support the weight of the body without damage if jacked from the center?

The same question can be asked about the front axle. It has the engine and the body to support. Is it strong enough to withstand jacking from the center without damage?

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