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Hello-
Thanks guys for the advice.
I focused on the 930 unit because its for my bus, which is considerably heavier than a bug, and you know it will take some serious torque to get it moving. I can supply the power but the weight and power is gonna kill transaxles even without over zealous stop light antics.
Please feel free to share ANY thoughts...
If it's for a bus, then that makes the 930 even a WORSE idea.
The first gear is REALLY, REALLY tall. You'll have to slip the clutch like mad and lug the engine all the time to get the danged car moving.
The torque applied to a gearbox has to do with the engine, not the car. The torque applied to the rear wheels has to do with the engine output AND the tranny reduction ratio... you multiply them together! So, an early 915 with a 7:31 R&P has a 4.429x3.182=14.08 1st gear, so you get a 14.08:1 torque multiplication. A 930 has a 4.22x2.25=9.50 1st gear, so you only get a 9.50:1 torque multiplication.
In other words, a 930 over an early 915 kills your torque to the wheels in 1st by about 1/3!!! That's a HUGE decrease, and a terrible way to go.
I _strongly_ recommend against it for your bus! I recommend either a 901 or an early 915... even using a 8:31 R&P in a late 915 seems like a poor idea (would make 1st 12.33:1 overall).
As a point of reference, a late bus had a 4.571x3.78=17.28 1st gear... so going to 9.50:1 cuts the reduction ratio almost in HALF from stock! Not a good idea.
Take care,
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Shad Laws
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