I had to replace the transmission in my 88 745 last week do to the failure of the old one. It was replaced with a used AW70 from another 88 740 with 114k from a pick and pull. Front/rear seals, gasket and filter were replaced. I picked up the car on Friday and the transmission would only shift if I took my foot off of the accelerator. It was not replaced at a Volvo shop do to price. That was fixed by adjusting the kick down linkage. When I checked the fluid it was down about 1/4 on the add level. I figured that driving the car caused the change. After filling the level came back to the correct level. The next time I checked it the level it was at least twice as high as it should. I drove home prepared to drain some fluid. When I checked it the fluid did not register on the stick. The level keeps changing. If it his checked warm, fluid does not register, if checked hot it is above the fill level. The level is always checked on level ground.
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90 744ti, Airbox, K/N, Cold air, G-Valve, Dual boost control, VDO, Modified exhaust. 88 745 gle.