The TH (turbo-hydramatic) 700R4 was developed for use after 1982 in GMC and Chevrolet cars and trucks.

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Why wont it shift?

Well i have more of a qiestion. I have a 1984 gmc trk with the 700 r4 and it wont shift? There are shift silanoids and i dont no what they do but i think shift ? So i was gonna chamge.them to see if that helped i think i can save it i hope

Answered! View the answer I have this problem too

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A 1984 700R4 transmission is hydraulically controlled through the valve body with only one solenoid to operate the lock-up torque converter.

Let's start with the basics - What was the circumstances that lead up to this point? Was the transmission shifting OK or has it been parked for a long period of time? Is the fluid level full and bright pink or is it dark or black? Does the fluid smell burnt?

BILL

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Aaron will be eternally grateful.
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