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Old 11-15-2003, 08:58 PM
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Beef up powerglide.

Whats the most important parts to replace on a stock powerglide. Ive read that the input shaft is weak. What else should be replaced. Will the stock version handle about 400 hp and 400 tq.

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Old 12-03-2003, 02:08 AM
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The Powerglides are seeing somewhat of a revival, especially in Nostalgia front engine dragsters. They all want the '66, which had a front and rear pump so the car can be push started. As far as mods to yours, the best advice is check out A1 Transmissions in Chatsworth, CA. They will sell you one for about $650 or so and give you a choice of first gear ratios. B&M doesn't do that. I believe that price is with the converter, but check to make sure. You can choose the stall for the converter, also.
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Old 12-03-2003, 09:49 PM
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Why a PG? What will it be used in? Hopefully a light car. First gear is very tall. The main performance concerns are the input shaft, high clutch hub for 5 disc clutch and the rear planet assembly. For 400 HP you shouldn't have much concern. The parts if you should want them can be bought from a mail order speed shop. Most replacement performance input shafts are splined for the Th350/400 converters. Rear planet gears are usually replaced with a lower first gear set up. This trans isn't real practical for a street car. I have one. I prefer the TH350. Many racers change out a glide at the track for a TH350 depending on the track and conditions. Having a converter that fits other transmissions is a big advantage for them. It also allows them to use the converter in their Th350 or TH400 for use in another car if they are racing two or more cars, which has become quite popular lately.
It should handle your 400HP in it's basic form with some good rebuild parts and good shift kit. How long it lasts will depend on the converter, trans brake and rear end gear ratio or other mods. The converter increases the torque output of the engine in relationship to the input of the transmission. The taller the gear the more load it puts on the tranny. A trans brake locks the tranny up(applies all the clutches at once) for racing.

Last edited by hasanybody1; 12-03-2003 at 10:10 PM.
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