I have a question. If I was walking through the woods and ran across a TT rear end and wanted to know if it was a 5:1 or 7:1 ratio rear end, how many turns of the drive shaft to make the rear axle make two revolutions? I know you can crank the engine over and find out but what about the drive shaft, is it the same or different procedure? I other words, (How many licks to the center of a tootsie pop?)
To make the rear axle turn 2 times would take 10 turns of the driveshaft on a 5:1, and 14 turns on a 7:1 assuming both wheel sides are turning together.
If one wheel is not rotating and only one side is turning it would take 5 turns of the driveshaft to have the one wheel side turn 2 times for a 5:1 and 7 turns for a 7:1.
Well my experience in gathering rear ends is this.
If you find it in the woods, it is a 7 to 1.
So ... how many chucks could a woodchuck chuck ?
That's funny, Mack!
I think you just put the end cap and count the teeth on the pinion gear.
I may be wrong but I think Joe has it wrong way round, with one wheel moving it will be 14 and with both turning, it will need only 7.
Install it on your TT.
Set throttle at 2000 rpm.
Push down clutch into low gear.
If your partner has to hold up two sticks correctly aligned to see if you are moving, it is a 7.
I think you can even just count the teeth on the worm gear. There was a recent post on this. A lot less counting than the pinion
I found my high speed gears in the woods! Also pulled a low speed Ruckstell from the woods. Current project is to combine them. Bring the rear end home and see if you've one the lottery!
Four starts (Teeth) on the worm of a 7.25:1 and 6 on the 5-1/6:1.