ATI
Compu-Flow Valve Bodies provide the most accurate and
efficient hydraulic controls possible for automatic transmissions.
Years of research and testing have enabled ATI to design
optimum oil circuitry for all popular transmission applications.
COMPU-FLOW STREET/STRIP VALVE
BODIES While any of ATI's Compu-Flow Valve
Bodies are "streetable", the Street/Strip
Compu-Flow is the #1 choice. These valve bodies provide
full automatic shifting if left in drive and manual
shifting if low is selected. In either mode, the Street/Strip
provides a firm, clean shift.

Lightweight Billet Aluminum PG Wicked Quick Valve Body® 203051
Amp draw on Solenoids
at 12 & 16 volts
Solenoid
Part # |
Current
at 12v |
Current
at 16v |
941030 |
7.65 |
7.95 |
941011 |
1.13 |
1.49 |

Lightweight Billet Aluminum T400 Wicked Quick Valve Body® - 403091 |
COMPU-FLOW REVERSE MANUAL VALVE BODIES Our
Compu-Flow Reverse Manual Valve Body shifts opposite
the OEM units away from neutral when up shifting (P-R-N-1-2-3).
There is no automatic shifting. It will leave in the
selected gear allowing street driven cars to move off
in 2nd or 3rd in slippery conditions. The governor and
related components are eliminated, as well as throttle
pressure, cables/vacuum lines and linkages. All units
freewheel if you lift in low gear; no engine breaking.
(Note: All Turbo units freewheel in 2nd gear except
#353400 for the T-350) This valve body is not recommended
for the Powerglide since it must pass through low to
get to neutral.
COMPU-FLOW FORWARD MANUAL
VALVE BODIES The Forward Manual Compu-Flow
is available with the same features as the reverse manual
units, except for the standard OEM shift pattern (P-R-N-3-2-1).
Engine braking is available in all gears. The Forward
Valve Body provides a generally slower ET for drag racing
since the band or clutches are on in low gear.
COMPU-FLOW REVERSE SAFETY
TRANSBRAKES These valve bodies have all the
same features of the highly successful ATI transbrake
and they also have the added feature of reverse safety
so that reverse cannot be selected accidentally or inadvertently.
The vehicle will only engage reverse gear when reverse
is selected and the transbrake solenoid is engaged.
COMPU-FLOW TRANSBRAKES Lock your race car on the starting line for hard, consistent launches. All Compu-Flow Transbrakes are reverse pattern, except for PG applications. These units are fully manual - no automatic shifting. The TH400 unit #403080 has a low draw - 1 amp - solenoids operating pilot circuits. On internal brakes, the solenoid is inside the trans. An ATI transbrake valve body is an excellent choice for bracket and delay box users.
Repair services and wet testing are also available
for ATI Valve Bodies. Consult your Sales Technician.
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Billet Aluminum Powerglide Wicked Quick Valve Body®
Comes standard in Superglide 4 and 2 and High Impact Proglides! Perfect for any Powerglide Transmission and a full 7.4 lbs lighter than OEM - weighs 6.8 lbs as is, and 8.4 lbs with solenoid, adapter, filter and spacer. Titanium Bolt option saves another 1/2 pound!
• Direct bolt-on replacement
• Direct replacement for the OEM unit
• Adjustable pressure regulator - U.S. Patent #7,780,564 |
• ATI Manual Valve - Part #203581
• Fully 5 axis CNC-machined
• Minimum flow restriction passages
• Ultra fast brake!
|
DESCRIPTION |
Part
# |
Price |
BILLET ALUMINUM SAFETY REVERSE TRANSBRAKE WICKED QUICK VALVE BODY |
203051 |
$699.00
|
TITANIUM BOLTS |
950310T |
$148.00 |
SPACER FILTER (INCLUDED W/203051) |
203563B1
|
$39.00 |
SPACER FILTER W/SCS-30 PORT |
203563B2
|
$39.00 |
ALUMINUM SEPARATOR PLATE |
203115A
|
$35.00 |
FILTER SPACER GASKET FOR 203051 |
203562B |
$3.00 |
|
GM
Powerglide Valve Bodies |
Part # |
MANUAL - FORWARD PATTERN
WITH ADJUSTABLE REGULATOR |
203200 |
(FORWARD) REVERSE SAFETY W/TRANSBRAKE EXTERNAL MRT ADJUSTABLE REGULATOR - GREAT FOR PRO TREE |
203050 |
FORWARD PATTERN TRANSBRAKE EXTERNAL MRT ADJUSTABLE REGULATOR |
203250 |
Due to hard to find cores, ATI Valve Body part numbers 203200, 203050
and 203250 are no longer available for sale over the counter but are
used only in transmission builds. ATI is working on a new line of
aluminum valve bodies to replace these and should be available soon.
GM
Powerglide Valve Body Components |
Part
# |
Price |
FOR INTERNAL TRANSBRAKES
203330, 203350, 203070
SOLENOID ONLY - 3/32"
BRAKE VALVE RETURN SPRING
WIRE CONNECTOR, STANDARD
WIRE CONNECTOR, SHORTY |
941011
203450
940330
940340
|
$117.38
$7.15
$8.95
$13.95
|
FOR EXTERNAL TRANSBRAKES
203250 AND 203050
TRANSBRAKE VALVE
BRAKE VALVE RETURN SPRING
SOLENOID DELETE PLUG ( for solenoid removal with
203250 transbrake )
|
203440
203460
207342
|
$31.22
$7.38
$24.95
|
FOR ALL ATI EXTERNAL TRANSBRAKES
SOLENOID WITH ADAPTER
SOLENOID ONLY
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$143.17
$110.95
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FOR ALL POWERGLIDE VALVE BODIES
GASKETS (3 SETS)
PRESSURE REGULATOR SPRING (ATI design for valve
bodies without boost valve)
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$24.64
$12.61
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Powerglide Valve Body Valves
Description |
Part # |
Price |
Purchase |
PRESSURE REGULATOR VALVE - NEW OEM STYLE |
|
$19.95 |
|
MANUAL VALVE FOR OEM VALVE BODIES - WIDE LAND |
|
$30.35 |
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Pass through Transbrake connector
Double end spade terminals allow for wire to pass from inside
the transmission case to the outside. For Powerglide and
T400, Lock-up. Includes o-ring. Available in black, red, and white.
Description |
Part # |
Price |
Purchase |
BLACK CONNECTOR |
|
$13.95 |
|
RED CONNECTOR |
|
$13.95 |
|
WHITE CONNECTOR |
|
$13.95 |
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Billet Aluminum T400 Wicked Quick Valve Body®
• Direct bolt-on replacement
• Just 4.2 lbs
• Fully 5 Axis CNC-Machined
• Ultra Fast Fluid Release Brake
• Minimum flow restriction passages
Shift Direction |
Shift Pattern |
Low band apply |
Transbrake Function |
Clean Neutral |
Part # |
Price |
REVERSE MANUAL |
PRN123 |
NO |
1ST ONLY |
NO |
403091 |
$649.95 |
PRN123 |
NO |
1ST & 2ND |
NO |
403085 |
$649.95 |
P(RN)123N |
NO |
1ST & 2ND |
YES |
403085CN |
$649.95 |
P(RN)123N |
YES |
1ST ONLY |
YES |
403091CN |
$649.95 |
PRN123 |
YES |
1ST ONLY |
NO |
403087 |
$649.95 |
FORWARD |
PRN32
2-SPD ONLY |
NO |
1ST & 2ND |
YES |
403086 |
$649.95 |
Clean Neutral Valve Bodies require different shifter. Contact sales tech.
Billet Aluminum T400 Wicked Quick Valve Body Parts
Description |
Part # |
Price |
SOLENOID ASSEMBLY |
403099 |
$259.50 |
TRANSBRAKE SOLENOID WITH ADAPTER |
403480 |
$215.30 |
TRANSBRAKE SOLENOID |
941030M |
$168.14 |
TITANIUM BOLT KIT - WICKED QUICK |
950312T |
$86.00 |
SEPARATOR PLATE |
403092 |
$35.00 |
GASKETS (REQUIRES 2 GASKETS PER VALVE BODY) |
403222 |
$4.95 EA |
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T400 E-Quick® Electronic Shift Billet Aluminum Valve Bodies
Great for racers
who can’t use
an air shifter and
need computer
controlled shifting, the E-Shift is a Reverse manual, (PRN123) billet aluminum valve body for high performance applications
with Low Gear Band Apply. Provides repeatable computer
controlled error free shifting for
consistent performance every run.
Controller not required for manual shift operation.
Description |
Part # |
Price |
E-QUICK REVERSE MANUAL VALVE BODY |
403070 |
$899.00 |
|
GM
TH400 Valve Bodies |
Part
# |
Price |
T400 - REV MANUAL - BILLET ALUMINUM - BAND APPLY - CLEAN NEUTRAL - P(RN)123N - FOR STOCK ELIMINATOR |
403062CN |
$586.07 |
TRANSBRAKE - REV PATTERN - INTERNAL
SOLENOID - '64-'92 - NO ENGINE BRAKING IN LOW
SOLENOID WITH ADAPTER FOR COMPU-FLOW BRAKE
SOLENOID ONLY FOR #403080
ADAPTER ONLY FOR #403080
|
403080
403621
941011
403620 |
$529.00
$139.95
$117.38
$54.50 |
STREET / STRIP - FORWARD PATTERN VALVE BODY - '64-'86 - FIRM NOTICEABLE SHIFTS
MANUAL - REVERSE PATTERN VALVE BODY - '64-'86 - ENGINE BRAKING IN LOW
MANUAL - FORWARD PATTERN VALVE BODY - '64-'86 - ENGINE BRAKING IN LOW & 2ND |
403100
403200
403300 |
$289.00
$329.00
$299.00 |
GASKET - REVERSE PATTERN (3 SETS)
GASKET - MANUAL / AUTO & FORWARD PATTERN (3
SETS)
GASKET - TRANSBRAKE (3 SETS) |
403220
403230
403250 |
$24.85
$24.13
$32.74 |
Repair services and wet testing are available for all ATI Valve Bodies.
The Transbrake’s main function is to unload the chassis while staging to make the car shock the suspension and hook consistently. The brake will accomplish this at a mere 1000 RPM. Going higher on the brake only serves to super heat the oil in the converter and make for inconsistent launches.
You should find an RPM that your engine is comfortable with (no stumble or hesitation), hopefully below 4000 RPM. Going higher on the brake will reduce the reaction time of the car, automatically putting you closer to the light. Then, the only reason for you to go higher on the brake is if you are late on the light. If you run a delay box, be sure to remove the time delay before testing. Many people have over a second in the delay box and stage the car at 5500+ RPM.
The lower the RPM at which you launch the car (relative to the stall speed of the converter), the more free energy the converter gives you. Plus, your converter and transmission will live longer without the excessive heat. Many large, long stroke engines will run faster from a very low stage RPM.
Many of our 350 cubic inch Super Stocker racers run the quickest from 1800 RPM. The converter will flash to its stall speed no matter at what RPM you stage, provided the engine responds properly to that RPM. Engines with two carbs and big plenums on the intake system will require higher RPMs to respond consistently. Again, going higher on the torque converter only serves to reduce the reaction time of the race car.
True stall speed occurs when two things are present at the same time. They are:
- The maximum amount of torque (power) is input to the converter.
- The maximum amount of load (work) is present for the converter to accomplish. Perfect example: The car is in a wheel stand climbing the ring gear and has not moved an inch forward while stall speed is occurring.
When checking stall speed using the transbrake, it must be checked on the starting line. Stage the car, deck the throttle, look at the stall speed, then release the brake and let the car leave. Most converter damage is caused by lifting the throttle from stall speed. Wide open throttle on the brake is extremely detrimental to the health of your converter. |
GM
TH350 Valve Bodies |
Part
# |
Price |
STREET / STRIP - FORWARD PATTERN - FIRM NOTICEABLE SHIFTS WITH FULL AUTO FUNCTION |
353100
|
$269.00
|
MANUAL - FORWARD PATTERN - FULL MANUAL GEAR SELECTION |
353300 |
$266.77
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MANUAL - REVERSE PATTERN - W/ BAND APPLY - ENGINE BRAKING IN 2ND, NO LOW ENGINE BRAKING |
353400 |
$289.00 |
MANUAL - REVERSE PATTERN - NO-BAND APPLY - NO LOW OR 2ND GEAR ENGINE BRAKING |
353200
|
$289.00
|
TRANSBRAKE - REVERSE PATTERN - REQUIRES BUTTON TO BE PUSHED TO ENGAGE REVERSE |
353080
|
$549.00
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SEPARATOR PLATES - FOR VALVE BODY #353080 - ALUMINUM
SEPARATOR PLATES - FOR VALVE BODY #353100
SEPARATOR PLATES - FOR VALVE BODY #353100 - ALUMINUM
SEPARATOR PLATES - FOR VALVE BODY #353200 AND 353400
SEPARATOR PLATES - FOR VALVE BODY #353300 |
353078
353110
353111
353170
353310
|
$22.00
$37.47
$36.05
$37.47
$33.10
|
GASKETS - STREET/STRIP (3 SETS)
GASKETS - TRANSBRAKE P/N 353080 (3 SETS) |
353230
353090
|
$24.95
$24.85
|
Repair services and wet testing are available for all ATI Valve Bodies.
Diagnosing
transbrake
solenoid issues
- Make sure you have a good ground to the chassis of the car.
- Run a temporary wire directly from the hot side of the battery
to a new switch to the solenoid. If this fixes the problem, you
have a ground or wire issue.
- If this doesn’t fix the problem, pull the solenoid and valve.
Inspect them to make sure there is no binding in the solenoid
or valve.
- Polish the valve if it has any sharp edges.
- Test the solenoid off the car. If it still doesn’t work, it’s time for
a new solenoid. Call ATI’s Sales Technicians for assistance.
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