98 Jimmy Transmission wont shift past 2nd Gear?

GMC4SOL

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HELP!?!?!? I just bought a '98 Jimmy SLE 2x4 4dr w/ 4.3L Vortec V6 4dr for $3,200and it broke down the 1st time we drove it! My gf is in very delicate health and we desperatly needed reliable transportation to get to/from docs/hosps. So we drove home from Hemet 60 miles , then it hesitated for a few seconds in Ranchita. So I pulled over at the general store and turned it off/on and drove home 18 miles without incident. The vehicle sat for 3days except my starting it in park once a day. We had to go to the hospital in San Diego and this would be Jimmy's 1st trip leaving Borrego Springs. We made it about 80miles, while on I-15N suddenly the engine shot up to 6,000+rpms and Ibarely made it out of 70mph+ traffic to pull over! I restarted and the transmission shifts smoothly from Park - 1st - 2nd but will not shift any higher? The engine has plenty of power and drives well under 35mph. I have researched it and believe it is the "B" or (2-3)trans solenoid that has gone out, but I would welcome any insight?? Plz help! ?? [/B]

Summary: 1st gear-Good; 2nd gear-Good; 3rd gear- WON'T Work IN EITHER Shift selection 3 or D; 4th gear- Can't get Past 2nd. Whether I manually shift or put it in Drive only first, second, and Reverse work.
 
98 tranny trouble

I found this site very interesting and good source of info google this question how can I tell if my 4L60-E transmission is bad, I found this to be very helpfull, It has I think a 3 part series.Let me know if it helps you out?
 


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