Thread: Which tranny?

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Here's a chart showing the gear ratios of all popular transmissions. With a 4.11 ring and pinion, the first gear on the 700R4 will be pretty much unuseable at 12.57:1, unless you're trying to climb trees with the car. The drop from 1st gear to second gear is pretty severe also, going from 3.06:1 to 1.62:1 on the gear change. So the motor would be screaming in 1st gear with the 12.57:1 final drive, then drop the r's way down with a 2nd gear final drive of 6.65:1. 4th gear overdrive final would be 2.88:1, so that would be ok for cruising.

TH400 might be my choice for a weekend driver if I were not concerned with fuel mileage. It's a pretty much bulletproof trans that will give you a 10.19:1 first gear and a 4.11 final drive.

http://www.oldengine.org/unfaq/leadfoot/trans.htm

I'd go with a Turbo 400 if you have room. I have a t-350 and 405 hp with out problems so far.

Originally Posted by techinspector1

Here's a chart showing the gear ratios of all popular transmissions. With a 4.11 ring and pinion, the first gear on the 700R4 will be pretty much unuseable at 12.57:1, unless you're trying to climb trees with the car. The drop from 1st gear to second gear is pretty severe also, going from 3.06:1 to 1.62:1 on the gear change. So the motor would be screaming in 1st gear with the 12.57:1 final drive, then drop the r's way down with a 2nd gear final drive of 6.65:1. 4th gear overdrive final would be 2.88:1, so that would be ok for cruising.

TH400 might be my choice for a weekend driver if I were not concerned with fuel mileage. It's a pretty much bulletproof trans that will give you a 10.19:1 first gear and a 4.11 final drive.

http://www.oldengine.org/unfaq/leadfoot/trans.htm

If He wants overdrive the 200R4 is not a bad choice,check out Art Carr's site also gear ratios are better spread than the 700R4.