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Gran Marquis Harsh 1-2 Shift, 4R70W
I have this car that has a harsh 1-2 upshift. I did a line pressure test expecting to find high numbers but the presures were within published specs. I can command the EPC pressure with my scan tool and get the line pressure to respond accordingly. The car has... Login to read more. 
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| Engine | 4.6 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2000 Mercury Grand Marquis GS 4.6L
| Engine | 4.6 L |
| Trans | 4-speed Automatic (Electronic) |
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