vanillagorilla

iTrader: (1)

I'm pretty sure how it works, but I'm just not sure.

There's a solenoid that's enabled by a switch, that redirects fluid flow in the valve body. The redirected fluid engages both the foward and reverse clutches at the same time. When the button is released, the fluid stops flowing to the reverse clutches and away you go.

Correct me if I'm wrong.

So are the clutches slipping while you're "on the brake"? I've heard that transbrakes create a lot of heat, but is that from the converter slipping or the clutches. Also everyone says they're hard on transmissions and parts, why? Is there any slamming of hard parts internally?

FWIW, I'm think of putting a TH400 with a transbrake in my truck which will probably have a raceweight around 4500lbs with me.

SLowETz

iTrader: (12)

That's how it works.
Does generate alot of heat. Try not to be on the brake for more than 2-3 seconds. Trans temps go up about 50* for each second the brake is engaged.

If it's been built w/a brake, it should already have the upgraded hard parts.

As stout as the 400's are, 4500#'s is a LOT of weight for a braked TH400.

vanillagorilla

iTrader: (1)

Sooo what creates all the heat, the slipping clutches?

I know 4500 is a lot, that's why I'm asking it here first.

vanillagorilla

iTrader: (1)

Any one else?

MrDude_1

iTrader: (4)

the engine is still producing energy.
with the transmission locked still, the entire energy of the motor is going into the hydraulic coupling (aka the torque converter)... and since its not moving, its mostly turning into heat..

so all this heat is going directly into your transmission fluid.

the energy the motor is has to go somewhere... in this case, 90% of it is turned into heat in the ATF...

RK2K2WS6

iTrader: (1)

I wouldnt worry about a trans break at 4500#