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Hello Everyone, I hope you all are doing well. I have a 98 GMC Suburban 4x4 and my transmission has been acting funny. At first it went into Limp mode and would only run in second and third gears. I had the code pulled and it was the 3-2 solenoid. I replaced it today and topped the transmission off. After doing so i proceeded to test drive the vehicle. The trans slipped a little going into first but other than that did fine. It shifted between each gear smoothly. I headed home 20-30 minutes after the test drive. 20-25 minutes into the trip, on the interstate, The vehicle Downshifted and the rpms shot up. At first it down shifted and the Rpms went up to 3 and stopped then they went to 4 and it down shifted again. i pulled over and restarted it. I proceeded to try and accelerate again and was unable to get the burb past 30 mph without the RPMs jumping up and losing power. Does anyone have any ideas on what this might be? If you need any more information please let me know.