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For replacement purposes, 89 is exactly the same as a 92 or 93.
The thing to look at now is the condition of the wire, and the solenoid that is mounted down on the side of the transmission which actually enables 4th gear (OD).
There's a single white wire that exits the front of the shifter box, udner the car up over the driveshaft, and goes into a 1-pin snap-together connector, crosses the transmission top and goes to the solenoid.
Ground path is through the transmission case. The relay energizes this wire to allow OD to engage; when you push the button and the UP arrow comes on, this wire will be de-energized.
Solenoids do fail, and they also can get plugged up and not pass any fluid. If this seems to be the case, and a new replacement is just too expensive, IPD sells a blockoff plate allowing the solenoid to be eliminated. OD will always be engaged then, the button on the shifter will do nothing, and you can only cause it to downshift by stepping on the throttle hard. It's not a bad way for it to work, but it's a little bit different from the way the thing is supposed to operate.
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::: Rob Bareiss, New London CT ::: 92 244 ::: 90 745GL ::: 90 745T ::: 84 242DL ::: 90 745T Parts ::: Used to have : 86 244DL, 87 244DL, 91 244, 88 244GL, 88 744GLE, 82 245T, 86 244DL, 87 244DL, 88 245DL, 89 244DL!
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