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Our 1995 525i has an issue with the torque converter only locking when cold and under load. When the temps are in the 50's or below the converter will lock when the car reaches 45-50 mph and you are still accelerating however if you let off the throttle, the converter will unlock. As the engine and transmission warm up, the converter will lock/unlock (surge) as you accelerate and will unlock when you let off the gas. When fully warmed up the converter will not lock and if the air temps are in the 60's or above it also will not lock. :dunno: The car was purchased new and now has 164,000 miles. We replaced the fluid, filter and gaskets @100,000 and @150,000. Any insight?

Thx,
Paul
 
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