Th400

[J-B Racing]

Is this possible that this company Shiftdynamics - Home
make a TH400 with a Full Automatic Trans Brake....
Has anyone heard about these guys...


Joe

 

[jakeshoe]

Yes,
Chris at CK makes one, but there isn't much demand for it so it is a custom order deal.

 

[norbs]

I"m still waiting for mine, but as you said there's no demand, so i guess its on the backburner for a long time.

 

[J-B Racing]

Kind of hard to understand how it would work with the Turbo Buick. Since the VB needs a constant Vacuum at the Modulator to make the Trans shift under hard acceleration. So how can a TH400 fully auto with a Brake work!!
Unless Chris or others found another way....

 

[jakeshoe]

Kind of hard to understand how it would work with the Turbo Buick. Since the VB needs a constant Vacuum at the Modulator to make the Trans shift under hard acceleration. So how can a TH400 fully auto with a Brake work!!
Unless Chris or others found another way....

I don't think you understand how the vacuum modulator on a TH400 works.

Lack of vacuum at WOT on a N/A engine.
Pressure (boost) on a turbo'd setup, all you need to do is bleed off the pressure through a check valve on a turbo'd setup.

 

[chris718]

oil is sent to the direct clutch in manual lo and seats a checkball in the direct feed passage while applying the direct clutch pack and at the same time seats a checkball in a pocket machined into the valve body to keep the oil charge from dumping out the manual valve.on release the governor oil is used to knock off the rear band to improve the 1/2 shift.

 

[J-B Racing]

I am still waiting for an answer from Shift Dynamics.
If the price is right. I may consider a TH400 that can be fully Auto and have a Brake.
Chris do you get much demand on these?

 

[J-B Racing]

oil is sent to the direct clutch in manual lo and seats a checkball in the direct feed passage while applying the direct clutch pack and at the same time seats a checkball in a pocket machined into the valve body to keep the oil charge from dumping out the manual valve.on release the governor oil is used to knock off the rear band to improve the 1/2 shift.

Got a reply from Shift Dynamics, and they do not make the Brake that fully Auto...
Chris, your the only one....I guess

Joe

 

[norbs]

Hutch transmission makes one, but you still have to shift 2-3.