Backwards dual hi

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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1929 AA boy
Posts: 91
Joined: January 17th, 2011, 8:11 pm
Body Type: AA
Model Year: 1929
Location: Dickinson, North Dakota

Backwards dual hi

Post by 1929 AA boy » January 12th, 2014, 6:54 am

Has anyone tried turning a dual hi backwards to make the low gear a high gear if so what kind of increase in speed am I looking at

Stakebed
Posts: 1187
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: Backwards dual hi

Post by Stakebed » January 12th, 2014, 10:07 am

people have done it but they are very loud and the dual high heats up quite hot after longer use. id asume it wouldnt last long...

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Brian T
Posts: 400
Joined: December 27th, 2008, 9:57 am
Body Type: 82A
Model Year: 1929
Location: San Diego

Re: Backwards dual hi

Post by Brian T » January 12th, 2014, 12:58 pm

I have heard that it as been done, but have not seen anything explaining how it was done, the Hi-Low unit cannot be installed switching end for end that I can see as the large end would not clear the brake cross shaft, looking at the internals it doesn't seem likely that they could be switched either.

I use my Hi-Low as a gear splitter, when a grade gets the better of her I shift it into low, (I have a clip on shift lever attached to the rocker pedal) I am now in 3rd gear low range, as speed increases the noise becomes fairly loud, I then shift back to Hi, of course this only helps on grades not top speed, so I would imagine the noise at max speed would be deafening.

I do have a spare Hi-Low unit, I think one day I will take a look, I do have Crosscuts excellent pics, maybe its possible he could chip in on this subject.
Nothing can be made fool proof, fools are ingenious bastards.

Stakebed
Posts: 1187
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: Backwards dual hi

Post by Stakebed » January 13th, 2014, 2:07 pm

whoops i should mention my knowledge of them is them being used in reverse on standard model A's. cant imagine they would last long in a heavier AA

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1crosscut
Posts: 832
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: Backwards dual hi

Post by 1crosscut » January 13th, 2014, 3:53 pm

Not sure if it could be made to work. I'm sort of a purist on these trucks so my thoughts are that if you can get the correct high speed rear end that is good enough.
To me it is the ride and not the speed that matters.
Dave
------------
Dave

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gunmetal 2
Posts: 213
Joined: April 1st, 2013, 12:51 pm
Body Type: 82-A
Model Year: 1929

Re: Backwards dual hi

Post by gunmetal 2 » January 13th, 2014, 4:49 pm

This is gunmetal 2 do you still want the front springs and did you get the pics I sent you?

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