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I have a 1998 jeep grand Cherokee laredo xj i6 4.0L 4x4 42re transmission...
Jeep is shifting terribly like really bad with a hard knocking noise ? what do i gotta do to fix it?

Vehicle: 1998 xj jeep grand cherokee laredo i6 4.0L

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Hi there,

The code P0783 indicates an issue with the shift solenoid. Here is a list of possible causes.

P0783 JEEP - 3-4 Shift Malfunction

Read more: https://www.autocodes.com/p0783_jeep.html

The code P0740 indicates an issue with the torque converter clutch solenoid. Here is a list of possible causes.

P0740 JEEP - Torque Converter Clutch Circuit

Read more: https://www.autocodes.com/p0740_jeep.html

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