Will a 10 tooth gear be noisier than the standard
11 tooth gear?
As long as the gears are meshed properly I don't see any reason why it should make noise.
Stephen
You will turn 10% more RPM for a given speed than standard. Your engine might be a little noisier at 10% higher RPM. Your rear axle might be a shade more noisier. However, I think that the difference, as it is said is in the noise and probably not detectable. If this is your biggest Model T worry you are in fantastic shape.
If you have the gears meshed right, they will work fine if they are new. If one is used, as in the ring gear, and meshed right, as in clearance, they will work fine if say the ring gear is not wore out, but may sing a little, in which won't hurt any thing.
Ted, when I was running a 10 tooth pinion I found that you went about 10% slower for the same RPMs! The noise was the same with either pinion... except on really huge, steep hills. Then the 11 tooth pinion makes your car absolutely silent... until you roll back down the hill and try it again in reverse!
Of course this pinion made one loud noise and then it got really quiet! Usually you can pull the pinion out of the pumpkin without splitting the two sides. At least you can with an 11 or 10 tooth, but once you spread out a 10 like this it won't go through that little hole... I know!
Terry, that pinion looks repairable! Just weld in another tooth and you'l have a 12 tooth for your high speed runs. A little JB weld and Lock-tite to take up the space on the drive shaft and you should be fine!
This pinion needs a little welding too.
Think it was John Reagan who mentioned balanceing the drive shaft. As far off in balance everything else is in a T that makes logic to me. The shaft is long and heavy supported at each end so it would cause wiping in the middle when out of balance.
Modern drive shafts are light with a paper tube inside usually a few small weights spot welded for balance.
Any way mine will be static balanced I intend to spin my engine ten percent more at speed.
Paul, it probably won't hurt it to balance the drive shaft, but it probably won't help it none either! I've never heard of a drive shaft "wiping" a torque tube. When you get a chance look at a drive shaft, if it can bend enough to touch the torque tube you have more problems than balancing will help!
IMHO, TH
Spelling correction! The whipping of the shaft side to side and up and down better? Never could spell, fell on my head to many times.
Whipping side to side... I still haven't ever seen this problem with a T. (I guess you can say I don't see it because it is inside the torque tube!) We have low speed engines; I don't have a tach on my T, but I bet 4K rpm would be just about the end of the world! There is a major amount of clearance between the drive shaft and the torque tube. About the worst you would ever notice in a badly out of balanced shaft is a little vibration... who has a T that doesn't vibrate? I mean a running T that doesn't vibrate!
TH
Don't know but every little thing helps!
I ran a 10 tooth pinion for several years.
The rear end was very quiet, certainly no louder than with the 11 tooth.
I had it in a speedster because it ran just about right with the old Warford in O.D.
They were faster in overdrive than the new Warfords.
Somebody mentioned 4000RPM.
That would be 100MPH with a stock rear end.
Were both of those Ford pinions? Other people made them earlier than Ford, and those required a matched ring gear.
My experience was the opposite. I think I got the setting too tight, and it broke the ring gear. The wheels locked at 60 mph, ruining a neare new set of tires. The pinion was not hurt, but everything else in the rearend was junked.
Oops, missed the last page.