Ran across this and wondered if it will work in my TT? Seems I read somewhere that the AA parts will interchange, but I my have been dreaming (wishful thinking?). Of course, if it's like mine (7.25:1) it's useless to me anyway. Anybody recognize from the picture or description if it is a 5.?:1 ratio?
Ray. 29 teeth on the bronze gear usually means 7.25-1 ratio. High speed gears have 31 teeth on the bronze gear and 6 on the pinion.
Respectfully, more teeth on the bronze would be a lower ratio, not higher (unless the worm has a steeper pitch), right? Not trying to disagree, but the math ain't working
I do believe the internals from a AA will work in a TT but the houseings are different.
I had 1 and give it to a fellow in VA that had bought a truck it fit close by.
Thanks Mack, tried to call you minute ago bt you're busy
Oh,I am on handcrank,I mean dial up.I will get off here in a minute.
I wish Ford would have described their parts better, but the picture really don't help much
Ray you on the phone
Handcrank That is funny
Ray. My post was incomplete. the bronze gear with 29 teeth has a worm with 4, giving you a ratio of 7.25-1, the bronze with 31 teeth has a worm with 6 giving you a ratio or 5.16-1
Okay...I see now. Thanks for the clarification Rod. Makes sense now
I bought an AA rear axle because it had the 5-1 ratio gears for my TT but the axle shafts couldn't be used because they were longer because of the 3/4 floating design used on the AA trucks. I didn't get the drive shaft so I don't know about that item's use on a TT.
Bob, will the ring and worm definitely interchange from an AA though, if by chance I run across one with the 5:1 ratio?
I'm 100% sure that someone discussed reproducing the high speed rear axle worm gear for the 1928 Model AA trucks. I'm 80% sure that they said the TT and AA were NOT interchangeable. And that they would entertain the idea of reproducing the high speed TT after they successfully did the AA and if there was enough interest in the project.
If no one remembers or knows for sure, I would recommend searching our site for reproduction AA worm gear and also http://www.ahooga.com/ or just posting the question on ahooga. "Who is reproducing Model A high speed rear axle worm gears?"
Good luck, and when you find out please let us known. I try to save that type of information so when the question comes up again we can find it easily.
Hap Tucker 1915 Model T Ford touring cut off and made into a pickup truck and 1907 Model S Runabout. Sumter, SC.