[Goat-Racer]

Ever since doing the direct drum dual feed mod to my 200-4r, the car wants to lurch a bit when I get up on the trans brake too quick. It used to be real happy from idle and you could whack the throttle as fast as you wanted.
I think I just need a bit more pump speed to fill the extra volume since the dual feed conversion.

Do most of you have to get a bit of RPM before activating the brake, or do you go from idle? I'm thinking that this may be common practice with other types of trannies.

Thanks!

[Rob B]

I've always staged and engaged my brake around 2-2500rpms, obviously while hold the actual brake and gas pedal, never had an issues of rocking or creeping once engaged. I have a TCI. That tranny went in wifes car and my new trans will have a hipster brake, won't know how that one acts until next spring. Seen many car idle into the beams, engage their brake, then when they get on the 2 step/rpm's, the car rocks or rolls a bit.

[60man]

My TH400 rolls forward a little when I release brakes after pushing
T-brake button. Is that "normal"? I always bring R's up to 2,500 before pushing
button as it activates launch control which kills timing (if used) and don't want to
stall motor. makes red lits easier though.

[Goat-Racer]

If you foot brake up to 2000-2500 then your suspension will load up a bit depending on how tight the converter is. When letting off the foot brake, the car will settle and all of the driveline will go slack as the car rolls forward. The only down side to that is that you roll in deeper than the point at wich you origionally stopped.

I just need to try the higher RPM engagement and let the car roll in. As long as it repeats then consistancy should not be an issue.
I guess I got spoiled with the setup before as I could engage off idle and the car never lurched, and barely rolled as I let off the foot brake.

The biggest thing I learned this weekend at the track is that my car really likes to be fully settled and have the most suspension travel availvable for the car to leave.
Looks like this Friday night at Speedworld will be the place to practice up!

[Goat-Racer]

Originally Posted by 60man

My TH400 rolls forward a little when I release brakes after pushing
T-brake button. Is that "normal"? I always bring R's up to 2,500 before pushing
button as it activates launch control which kills timing (if used) and don't want to
stall motor. makes red lits easier though.

How do you like the brake so far? Did it help your 60' times?

[60man]

Could be suspension "relaxing" but it feels like it moves forward.
My converter doesn't push very hard @ that rpm....sweet spot I assume.
Not sure as this is all new for me. I"ll trying keeping brake applied and see what
happens. Just don't want to F anything up.

[Goat-Racer]

Your not going to hurt anything. The forward motion you get is the preloaded drive line (entire power train) unwinding and going slack as you let off the brake pedal. Now way of getting away from that.

[60man]

Court is still out on improving 60' but I think they are more "steady". Doesn't blow tires off as much but has (IMO) little to much wheel speed on hit ?? Not sure about RT's ? I have a lot of close calls with double O & O teen numbers. Not that I am complaining. I find it easier leaving on button.
Just need more seat time.

FWIW Brian, my MPH is same as yours.

[Rob B]

Originally Posted by 60man

Court is still out on improving 60' but I think they are more "steady". Doesn't blow tires off as much but has (IMO) I find it easier leaving on button.
Just need more seat time.

Yep, you nailed it!.

[Ron]

My powerglide does not move a hair. Rock solid, no movement.

[Jim Yanoski]

Does the 200 have a band adjustment? When I ran a glide, I adjusted the bands every 50 passes for PM. ........ Jim

[Goat-Racer]

Well it does by means of shimming up the servo apply pin, but the intermediate band applies 2nd gear and really has nothing to do with the brake on a 200-4r.
This particular brake will apply the direct clutches (on top of forward and low) to lock things up. It dumps line pressure to direct when it releases and away you go!

I really think that the issue is that it is taking longer to fill the inner AND outer cavities of the direct drum not that we have done the dual feed mod. Probably just need to get a little more pump speed/volume before getting on the throttle with the brake engaged.