23.12.2008, 14:42
What power level are you looking at throwing at the TH350? Need to know more about your requirements.
We've been running a stock TH350 that we rebuilt in 1995 with a B&M shift kit as the only improvement and have never had a failure and make over 300 horsepower. If the transmission is built correctly, properly cooled, fluid is changed and you don't plan on launching off of a Transbrake then a good unit will last a long time. Transmission has gone a best ET of 10.95 with 1.4X 60 foot times.
You don't need a powerglide unless you want to spend more on building a two speed than you would with a mild 3 speed. A stock glide is not strong if you plan on throwing lots of power at it. In addition to this, you will need a pretty steep rear gear to use a glide correctly. A TH400 has a higher first gear ratio meaning that you would need more rear gear to get the same multiplication off the line, and would turn higher RPMs in 3rd which is still 1:1 like a TH350. In addition, it is heavier that a TH350
In terms of stall speed for your converter selection, you need to look at what RPM you make your maximum torque at. If you plan on dragracing then a 2500 stall isn't the way to go and you won't be into the powerband of most aftermarket performance camshafts that you would want to use for dragracing purposes. For dragracing, a narrow powerband is better than a broad powerband.
Cheers,
Alex
We've been running a stock TH350 that we rebuilt in 1995 with a B&M shift kit as the only improvement and have never had a failure and make over 300 horsepower. If the transmission is built correctly, properly cooled, fluid is changed and you don't plan on launching off of a Transbrake then a good unit will last a long time. Transmission has gone a best ET of 10.95 with 1.4X 60 foot times.
You don't need a powerglide unless you want to spend more on building a two speed than you would with a mild 3 speed. A stock glide is not strong if you plan on throwing lots of power at it. In addition to this, you will need a pretty steep rear gear to use a glide correctly. A TH400 has a higher first gear ratio meaning that you would need more rear gear to get the same multiplication off the line, and would turn higher RPMs in 3rd which is still 1:1 like a TH350. In addition, it is heavier that a TH350
In terms of stall speed for your converter selection, you need to look at what RPM you make your maximum torque at. If you plan on dragracing then a 2500 stall isn't the way to go and you won't be into the powerband of most aftermarket performance camshafts that you would want to use for dragracing purposes. For dragracing, a narrow powerband is better than a broad powerband.
Cheers,
Alex