O.k., this has probably been discussed in length before, but can I get some feedback concerning using a 10 tooth pinion gear vs. the standard 11 tooth? What would be the advantage and would it be worth putting on my 1914 Touring? I'm in the middle of rebuilding my rear axle and have the standard ring and pinion set, but I've heard others say that I should go with the 10 tooth. Is it worth doing, or should I stay with the standard issue? I live in southeast Michigan and our terrain is mostly flat with very few hills to speak of. I haven't done any touring outside of our state and don't foresee any big trips in the future.
10 tooth pinion would make the car have a lower top speed. It might be an advantage if you lived in some place that was very hilly, you normally carry three passengers, and you could not afford to buy a Ruckstell.
I don't see any advantage for you.
On flat ground no need. On more hilly terrain like here in E Tennessee,some have enjoyed more comfort due to increased pulling power. I do not have one but have driven a T with the ten tooth which surprisingly did not seem to take much off the top end. Hope this is helpful.
I have a ten tooth pinion in my 24 Fordor and it really makes a difference on the hills around here as Warren states, i went up the hill at Newport,In just for fun and made it from a standing start in high gear, not fast but just chugged right up.
My Runabout had a 10 and I ran it that way for years but recently switched to an 11. I have to agree with the above posts word for word. Consider the terrain where you live. My area is mixed, so there are times either gear would be better than the other. What I found annoying about the 10 was how soon I would have to upshift. I will be keeping my 11.
Bill -- The 10-tooth pinion gear is wonderful when coupled with an auxiliary transmission which has an overdrive, such as the KC Warford. It's also advantageous if you have a heavy car, like Rick G. Given your situation, I'd suggest that you stick with the stock rear gear unless you plan on having an overdrive to go with it.
There's been a lot of discussion on this forum previously about the merits/disadvantages/compromises, etc. of deviating from the standard 3:63 to 1:00 rear end gear ratio. It makes me wonder how much engineering, testing, trial & error, discussion, meetings, and possibly arguing amongst each other, Henry Ford and his engineers did before the final 3:63 to 1:00 was finally decided upon?. And I wonder how much of that "decision making" might have been documented way back then. If such documentation was made, and if it could be found in Ford Company records, it might shed some light on how and why the original decision was made. Certainly, like so much other automotive engineering, the final decision was a "compromise", as those Model "T" engineers knew that Fords would be driven all over the USA (and world) in every possible geographic situation. Because such a decision was certainly a huge factor in the success (or failure) of the Model "T", you'd think that much of that type of documentation must exist, if only just hand-written notes from one engineer to another! Again, just wondering,.......harold
Once again I am enlightened and grateful for all the helpful information! Thank you one and all; I believe I will be sticking with Henry's original plan for my 1914 Touring.
There is one thing different from the "old days". Tires are bigger around now. I am running them in my Ts with not problems and both run with the best on flat ground.
Anyone have a good used 10 tooth pinion gear they want to sell?
Steveschmidt at hotmail.com
Steve -- I sent you a PM through the Forum system. If it doesn't come to your inbox, check your junk mail folder. (Sorry, I didn't see your email address in your post.)
Steve, if Mike's PM doesn't yield what you are looking for, I have one I purchased recently and have yet to remove it from the driveshaft assembly.
Hope this helps.
Allan from down under.
I believe all the T's used for rides at the Henry Ford have ten tooth pinions. Low speed and heavy loads are the rule at the Village.
10 tooth for the Henry Ford village cars makes perfect sense. They're not required to do 35 or 40 mph all day; but rather pulling power (three XXL sized passengers can weight over 650 lbs easy) and engine braking is what's needed.
I found the 10 tooth to be way better at the village. I got to use high gear a lot. This year with the 11 tooth, I was always shifting to find the right gear. Out on the public streets though, high gear wasn't too bad with either gear. It was low gear that was the problem. With the 10 tooth, low gear was so low that it was silly. You couldn't get half way across an intersection without shifting. I'm sure it was great back in the old buried up to your axles in mud days. No use for it now. It would be interesting to hear from owners of heavy Sedans and Fordors.