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Home >> Pontiac >> 2008 >> Vibe Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 206 (Automatic Transmission - 4T80-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> Line Pressure Check >> Special Tools >> Notes

Special Tools: Notes

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

J 21867:  Pressure Gage

For equivalent regional tools, refer to Special Tools .

Line pressures are calibrated for two sets of gear ranges-Drive-Park-Neutral, and Reverse. This allows the transmission line pressure to be appropriate for different pressure needs in different gear ranges:

Gear Range Line Pressure Range
Drive, Park or Neutral Minimum line 50-55 psi, Maximum line 230-250 psi
Reverse Minimum line 90 psi, Maximum line 300 psi

Before performing a line pressure check, verify that the pressure control solenoid for the transmission is receiving the correct electrical signal from the vehicle computer:

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