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Old 04-05-2007, 09:25 PM
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th 400 vs powerglide

hey, i currently am running a turbo 400 pro built with a 4500 convertor and want to switch up to a trans brake the only problem is that it seems it is only availible with a reverse pattern valve body (goofy) but i have a glide pro built with a 4500 convertor hardened shafts etc. with a brake on it A: the car is a huge pain in the *** to change the trans B:the car is a 'street' car and i dont want to put crazy 6 14 gears in it and C: the car weighs 3000 with me in it, the car it came out of weighed 2600 is it practical to run the glide or should i just continue to foot brake it ( runs 1.4 shorts now)
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Old 04-06-2007, 06:24 AM
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I prefer the glide, but your case I would keep the 400. The glide has a much higher first gear and I think it would build up a lot of heat very fast on the street.
Bob
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Old 04-06-2007, 06:40 AM
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i think the 400 takes about 45 hp to turn where the powerglide only takes about 18hp
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Old 04-06-2007, 06:10 PM
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More car info is needed.
Tire size, gear ratio, shift RPM, Engine info and your REAL driving style is needed. How much street driving do you do?
Also, what brand shifter do you have/use?
There is more to consider than shift pattern. Street driven T400 Brake trans WILL break parts. You MUST understand the dynamics of a 3 speed reverse pattern/transbrake trans. There is NO engine braking function in 1st or 2nd. The trans will freewheel on decel. On & off the gas pedal in 1 or 2 causes severe shock internally in the trans and will break parts. I have heard all the stories... If you drive a reverse pattern or brake on the street it will break. It is only a question of when. Powerglides do not have the same concerns as they employ a completely different geartrain and powerflow. Please inform us of your car info so we can better advise you...
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Old 04-07-2007, 07:41 PM
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ok heres the specs 3000lbs loaded 31.5x16.5 hoosier quick times currently running a 5.86 gear (only because it came out of my stock car in good shape and wanted to try it) usally run a 4.88 or 5.13. the street driving is not a big deal only that i some times go on the highway and like to go with the speed of traffic. right now it has a 350 based engine. b&m pro stick shifter, i shift 1-2 at 8000 2-3 at 7500 run through the traps about 7000 had some issues 5 or so years ago with ballooning the converter and popping the bellhousing off but sorted that out. here is a picture of it leaving, picture is kind of crappy though. thanks for the engine braking info... did not know that
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Old 04-07-2007, 08:43 PM
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"There is NO engine braking function in 1st or 2nd."
This would only be true if you removed the second gear band and changed the valving to loose low gear deceleration. I've run reverse valve bodies in turbo 400s and 350s for years and they all had braking until I removed second gear band to gain that infinate amount of horsepower to the ground. I might add that it's not worth it for brackets.

Bill
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Old 04-08-2007, 08:44 AM
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Reverse manual valve bodies are not made with any first or second gear band apply circuits.
Forward manual valve bodies do employ these oil circuits and provide engine braking.
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Old 04-08-2007, 11:16 AM
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Years back B&M offered a reverse pattern with engine braking. I have the instruction sheets somewhere.

The off road racers like reverse patterns manual trannys. That way R and 1 are close to each other for rocking the vehicle if stuck.

They also like engine braking for a down shift into a turn.

So .... in closing , I have seen the engine braking on t-400 tranny with reverse pattern shift , not a t-350.

Seems like Art Carr ( the real one) & Fairbanks offered these v-bodys too.


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Old 04-08-2007, 02:04 PM
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Good assembly of A/T men here.I am building ,for the first time,a '68 Nova with P-Glide and very modest 454.Peanut ports '98 with stock roller cam.It will be a street only car.Can I use a Trans-brake for once in a while sprints?
I will use a TransGo reprograming kit,special input shaft and steel hub.
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