999 transmission

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hossbee

hossbee

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FE27C2E0-19A3-4DBA-9126-F8B1E90B7B04.jpeg
Bought transmission yesterday thought was a 904. Number on pan is PK4431427 9889. Was gonna use for my SB. What is this on transmission?
 
Not sure ,and I'm sure a Know it all will chime in. I think its the converter lockup connection
 
A question better suited for one of the "Know it Alls"
 
In Tom Hands book about torqueflites he refers to the 999 as a mini hemi trans which, when looking at the numbers is what you have.

It is low stall, electronic lockup and long extension.
 
long about 87 or so, the a999 went from hydraulic lock up to computer controlled. what you see is the wiring connector for the lockup. dave. ps, they are a great transmission and a direct fit.
 
I believe it is a matter of not booking it up so the lock up doesn’t engage.
 
PK calls out a lock up trans....Does input shaft have a "reservoir tip" (non splined)? Thats a lock up input shaft. If you want to run the lock up as a slipper, just dont hook up the sensor, but I gotta ask why not: cruising and flip the switch..you get a 250 rpm reduction in engine speed with no other loss. In theory, the Idea is to route 12V to switch through a 45-55 psi hobbs switch from the governor pressure port, and then put a rocker switch in the cab. Pressure port will open under ~45 MPH and not allow 12V to get to electically operated OD fluid control solenoid so it will disengage when you slow down and cut back in at speed if you have the switch activated. Computer took coolant, speed, vacuum load, etc into consideration when stock. See if 12V applied to that switch makes any sound in the trans, maybe a little thunk or click? (maybe nothing if internal pressures are under a certain psi) All I see is 2 and 3 pin connectors.....Here is a single wire switch advertised
Chrysler A904 Lock up Solenoid with Single Wire A998 A999 TR-6 Torqueflite 6 A-904 A-998 1987-2003
 
Last edited:
pishta said:
Does input shaft have a "reservoir tip" (non splined)? Thats a lock up input shaft. If you want to run the lock up as a slipper, just dont hook up the sensor, but I gotta ask why not: cruising and flip the switch..you get a 250 rpm reduction in engine speed with no other loss. In theory, the Idea is to route 12V to switch through a 45-55 psi hobbs switch from the governor pressure port, and then put a rocker switch in the cab. Pressure port will open under ~45 MPH and not allow 12V to get to electically operated OD fluid control solenoid so it will disengage when you slow down and cut back in at speed if you have the switch activated. Computer took coolant, speed, vacuum load, etc into consideration when stock. See if 12V applied to that switch makes any sound in the trans, maybe a little thunk or click? (maybe nothing if internal pressures are under a certain psi) All I see is 2 and 3 pin connectors.....Here is a single wire switch advertised
Chrysler A904 Lock up Solenoid with Single Wire A998 A999 TR-6 Torqueflite 6 A-904 A-998 1987-2003
Click to expand...

PLUS they run cooler when in lockup.:D
I even notice my engine temps drop in the summer when in lockup.
(Zero converter slip = less heat generated)
 
hossbee said:
This is what the shaft with splines look like.View attachment 1715479616
Click to expand...
That will be nice with the electric lock-up. The earlier lock-up a999 are hydraulic and were some what troublesome for Chrysler. Mine is in a 83 grand fury. Not sure what it is for sure but I"m hoping it does not have the lock up but it is unlikely it doesn't. Its a cop car so maybe. Fender tag says it has a a999. Wont know if it locks up till I pull the converter I guess.
 
motorpirate said:
It's a lockup.
Do you have the converter?
Depending what your intentions are for it Turbo Action will make you a non lockup high stall converter that will fit that 26 spline lockup input shaft.
Click to expand...
I do have the converter. But I’m gonna get a 2200 26 spline stall. I didn’t know exactly what kind transmission I had until all the replies. Gonna use the electronic lock out.
 
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