Four speed to three speed?

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1crosscut
Posts: 817
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Four speed to three speed?

Post by 1crosscut » February 28th, 2017, 8:44 am

Is it possible to pull the engine and four speed transmission out of a 1929 worm drive and replace it with an engine coupled to a three speed transmission without doing any modifications?
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Dave

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

Re: Four speed to three speed?

Post by Stakebed » February 28th, 2017, 9:58 am

hmm, I want to say yes as people fit the 4 speeds in standard model A's and convert them back to 3 speeds without issues...now about the dual high or intermediate shaft mating to the rear that I cannot answer... were 28-29's available without a dual high? cant say I've seen one...

flatford39
Posts: 456
Joined: September 24th, 2009, 3:06 pm
Body Type: Express
Model Year: 1928
Location: NE Illinois

Re: Four speed to three speed?

Post by flatford39 » February 28th, 2017, 2:38 pm

28 & 29's came standard with the 3 speed. My 28 has the three speed and low high. I suspect it is a bolt in. you may want to save that four speed bell housing as that is the hot set up to putting a T-5 in an A. I have seen them sell for $300.00.

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Chris Haynes
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Body Type: 82A
Model Year: 1930
Location: North Hills, CA/ Pine Grove, CA

Re: Four speed to three speed?

Post by Chris Haynes » February 28th, 2017, 5:00 pm

Why would you want to lose the 4 speed?

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gunmetal 2
Posts: 211
Joined: April 1st, 2013, 12:51 pm
Body Type: 82-A
Model Year: 1929

Re: Four speed to three speed?

Post by gunmetal 2 » February 28th, 2017, 6:16 pm

I have a 29 AA with the 3-speed transmission out any thing else. I posted restoring a 29 AA look through my library on photobucket and you will see pics of my three speed hooked up to engine and torque tube.

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Neil Wilson
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Joined: February 5th, 2003, 9:42 pm
Body Type: 82-A/89-A
Model Year: 1930
Location: Boulder, CO
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Re: Four speed to three speed?

Post by Neil Wilson » March 1st, 2017, 1:47 pm

1crosscut wrote:Is it possible to pull the engine and four speed transmission out of a 1929 worm drive and replace it with an engine coupled to a three speed transmission without doing any modifications?
You will need the coupling shaft for the three speed (or the Ford optional dual high - or a 1928/1929 Warford). All AA's came with the A chassis 3-speed through about August 1929. The front u-joint is the A chassis u-joint. The rear u-joint needs the A chassis front knuckle (i.e a standard AA u-joint used this the three speed AA's.
Regards, Neil Wilson
______________________________________
neil@aafords.com - use this email for contact
https://aafords.com/ - Ford Model AA Truck Club @ aafords.com

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1crosscut
Posts: 817
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: Four speed to three speed?

Post by 1crosscut » March 1st, 2017, 5:51 pm

Thanks Neil, The gent I'm helping on this is in Texas so I don't have the ability to crawl around and look it over. Was just hoping to make a simple switch and avoid having to swap out flywheel housings. Not sure he is up to dialing in the flywheel housing to the flywheel plus a rebuild of the transmission.
Is the necessary coupling shaft one of those difficult to find items??
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Dave

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