1931 model AA truck

T

Titan1225

Junior Member
Could a late model 1931 have come with a model B engine?? It only has 12K miles total so seems unlikely that it needed an engine change! Doug
 
I believe that the last Model A's (cars anyways - not sure about trucks) were assembled in March 1932 when the first Model B engines were also starting to roll out, so could maybe be possible. What's the number on the engine?
 
Where are you located? I sold an AA truck many years ago with a B engine. Only because someone gave me the B engine. Does the cab have bullet holes in it going from the inside out? I was in central California at the time.
 
Miles don't mean too much compared to age.A fire dept a couple of towns over has an A truck with less than 6000 miles.Word of mouth,passed down from father to son volunteer firemen,says it is on it's third engine.Two were from freeze cracking,and one from inhaling too much dirt.It spent hundreds of hours parked on a sandy beach pumping water for the town during a drought.You never know what happened in the last 90 years.Back in the 70's I took a low mile speedo out of a fire truck and put it in my coupe.I wasn't selling it,I wasn't looking to make it look like it had low miles,the speedo just had perfect numbers and face.I put my old one in the fire truck,it is still in there and working today.
 
The engine serial number would tell the information if it is still mated to a B or BB clutch housing . Ford started with model AB engine production in late November of 1931. The B engines all started life with a new clutch housing to accommodate the new transmissions used in 1932 production.

Ford made the Model A and AA engines up into November of 1931 for production but none were produced at the Rouge after the Model B started production that same month. Ford outsourced the castings for the Model A type engine and built them on a separate line clear up to 1941. They started using model B cam components in august of 1932 so that they wouldn't have to manufacture two separate assemblies.

A lot depends on the serial number of your truck as to whether it may have a B engine but those first B engines were AB or AAB prefix till April of 1932. The number were not on the engine but only on the flywheel housing.

There is so much water under the bridge since that time, it would be hard to prove one way or the other but the truck would have to be a very late 1931 to have even considered whether a B engine was installed at manufacture. This is a good link for numbers.
http://www.fordgarage.com/pages/ABenginenumbers.htm#C1
 
Well--Here are the numbers on the side of the block---5214937-- No STARS BEFORE OR AFTER & NO AA OR BB. Maybe the engine was an up grade !! The transmission ( 4 speed) appears to have a bellhousing attached to it. Doug
 
Charlie--Thanks for your response. It has a model A Cab on the truck & the title says it is a 1931 AA Ford. It has very low miles. Doug
 
Charlie--Also the oil pan is dimpled for the larger diameter connecting rod bolts, it has a fuel pump, a model B head & water pump, etc. Bob (From above post)--I would say even though it has low miles that the engine must have been changed sometime in its past!!! Doug
 
Last edited:
My Pop had multiple harvest trucks over his life time and we didn't really put a lot of mileage on them but we hauled a lot of heavy loads over the years. They were mostly used during harvest and several times during the year for hauling grain that had been stored on the farm and for hauling livestock to market. Fleet vehicles are generally a different story so it depends on what it was used for.

We never had any warranty problems with the trucks when they were new or problems within 4 or 5 years of new but I've seen other trucks with engine troubles in the area where I grew up in Kansas. Things happen no matter how well a person takes care of their equipment.

The AA truck's transmission and clutch housing will bolt right up to a B engine. It looks like someone purchased a new or good used engine to replace a problem engine at some point.
 
Last edited:
Titan1225 said:
Charlie--Thanks for your response. It has a model A Cab on the truck & the title says it is a 1931 AA Ford. It has very low miles. Doug
Click to expand...

Titan1225 said:
Charlie--Also the oil pan is dimpled for the larger diameter connecting rod bolts, it has a fuel pump, a model B head & water pump, etc. Bob (From above post)--I would say even though it has low miles that the engine must have been changed sometime in its past!!! Doug
Click to expand...

Sounds like you are looking at all of the right things. Does the fuel run down from the tank and then through the pump?

Charlie Stephens
 
You must log in or register to reply here.
Back
Top