File in Section:

Service Bulletin

Bulletin No.:
Date:

PI1024
August, 2013

PRELIMINARY INFORMATION
Subject:

2014 Chevrolet Spark New Product Information for Jatco CVT Automatic Transmission

Models:

2014 Chevrolet Spark
Equipped With Jatco CVT Automatic Transmission

Transmission General Description
The JATCO CVT Transmission is a continuous variable transmission with a pair of variable pulleys, a steel belt and a
shifting ratio planetary gear set designed to improve the overall performance of the transmission. Each pulley set
has one fixed sheave and one moving sheave which determine the transmission ratio in each range. This
transmission has an overall ratio spread of 7.3:1
For detailed information and component pictures regarding this transmission refer to SI. Go to > 2014 Chevrolet
Spark (US/Canada) > Service Manual/Bulletins > Transmission > Automatic Transmission - Jatco CVT > Description
and Operation > Transmission Component and System Description

Transmission Component View

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1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.

Engine Lift Bracket
Engine Lift Bracket Bolt/Screw
Transmission Case Bolts/Studs
Transmission Case Plug Seal (O Ring)
Transmission Case Plug
Transmission Vent Pipe
Transmission Vent Hose
Transmission Vent Hose Clip
Transmission Output Speed Sensor
Transmission Input Speed Sensor
Vehicle Speed Sensor Seal (O Ring)
Manual Shift Detent Assembly Lever (With Shift Position Switch)
Transmission Speed Sensor Bolt/Screw
Transmission Range Selector Lever Assembly
Transmission Range Selector Lever Washer
Transmission Range Selector Lever Nut
Transmission Fluid Pan Assembly

18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.

Transmission Fluid Pan Gasket
Transmission Fluid Pan Bolt/Screw
Transmission Fluid Pan Drain Plug
Transmission Fluid Pan Drain Plug Gasket
Font Wheel Drive Shaft Oil Seal Assembly (RHS)
Font Wheel Drive Shaft Oil Seal Assembly (LHS)
Transmission Fluid Fill Tube
Transmission Fluid Fill Tube Plug Assembly
Transmission Fluid Fill Tube Bolt/Screw
Transmission Fluid Fill Tube Seal (O Ring)
Transmission Fluid Pan Magnet
Transmission Fluid Drain Plug and Overflow Tube

Transmission Cross-Sectional View

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1. Converter Housing
2. Oil Pump
3. Counter Drive Gear

4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.

Control Valve
Oil Pan
Primary Pulley
Steel Belt
Secondary Pulley
Planetary Gear (Auxiliary Gearbox)
Side Cover
Transmission Case
Differential Case
Final Gear
Reduction Gear
Counter Driven Gear
Drive Sprocket
Oil Pump Chain
Torque Converter
Driven Sprocket

Transmission Fluid

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• In the United States use: ACDelco CVT Fluid P/N 19260800 (Shown)
• In Canada use: ACDelco CVT Fluid P/N 19299096
The Jatco CVT automatic transmission uses a transmission fluid which is green in color. This fluid is DIFFERENT
from the Saturn CVT green automatic transmission fluid.
DO NOT use the Saturn CVT green automatic transmission fluid or DEXRON VI, as these fluids ARE NOT
compatible with the Jatco CVT automatic transmission.

Transmission Fluid Level and Condition Check
Caution: Use the correct transmission fluid as identified in this PI. Failure to do so may result in internal
transmission damage.
1. The vehicle must be on a flat surface.
2. Move the selector lever into the Park (P) position and then completely engage the parking brake.
3. Start and idle the engine.
Notice: The CVT fluid is largely affected by temperature, therefore be sure to use the diagnostic tool to
check the fluid temperature while adjusting.
4. Wait until the transmission fluid temperature reaches 122°F (50°C).
5. Move through the selector lever positions with the foot brake depressed. Switch the selector lever from position
P to L and then back to P. Hold each position for at least 5 seconds.
6. Verify that there are not any transmission fluid leaks.
Notice: Continue to perform this work with the engine idling.
7. Check the transmission fluid temperature with the diagnostic tool.
8. When the transmission fluid temperature has reached approximately 122–176°F (50–80°C), raise the vehicle.

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9. Remove the drain plug (1). Remove and DISCARD the drain plug gasket (2).
⇒ If the fluid is flowing as a steady stream, wait until the fluid begins to drip. If no fluid comes out, add fluid until
it drips out.
Notice: Do not re-use drain plug gasket, replace with a NEW gasket.
10. When the fluid drips out from the overflow tube, install the drain plug (1) with a NEW gasket (2) and tighten to
34 Y (25 lb ft).
11. Lower the vehicle.

Transmission Fluid Cooler Flushing and Flow Test (JATCO CVT)

Notice: Refer to SI for the complete transmission fluid cooler flushing and flow test procedure. Go to > 2014
Chevrolet Spark (US/Canada) > Service Manual/Bulletins > Barina Spark Automatic Transmission >
Transmission > Transmission Cooling > Diagnostic Information and Procedures > Transmission Fluid Cooler
Flushing and Flow Test (JATCO CVT)
GM studies indicate that plugged or restricted transmission oil coolers and pipes cause insufficient transmission
lubrication and elevated operating temperatures which can lead to premature transmission failure. Many repeat
repair/replacement cases could have been prevented by following published procedures for transmission oil cooler
flushing and flow checking. The procedure includes flow checking and flushing the auxiliary transmission oil cooler.
The 2014 Spark ONLY USES GM transmission fluid ACDelco CVT Fluid P/N 19260800 - United States, and in
Canada ACDelco CVT Fluid P/N 19299096, when performing the Flushing and Flow Test on the Jatco CVT.
Cooler Flow Check and Flushing Steps
Time allowance for performing the cooler flow checking and flushing procedure has been included in the appropriate
labor time guide operation. The service procedure steps for oil cooler flushing and flow testing are as follows:
1. Machine Set-up
2. Determine Minimum Flow Rate
3. Back Flush
4. Forward Flush
5. Flow Test
6. Code Recording Procedure
7. Clean-up
Special Tools
For equivalent regional tools, refer to Special Tools in SI.
• DT-45096 Transmission Oil Cooling System Flush and Flow Test Tool
• DT-45096-50 Transmission Cooler Flush Adapter
• DT-51175 Range Switch Tool
• DT-51323 Seal Installer
• Shop air supply with water/oil filters, regulator and pressure gauge – minimum 90 psi
• Eye Protection
• Rubber Gloves