Hi guys,
here's the long story short:
Originally: 1991 E34 535i 3.4L with ZF 4HP22 automatic Transmission (engine was shot, tranny was excellent)
We did an engine/tranny swap using an E32 (1988 735i) 3.4L, also having a ZF 4HP22 transmission. I had never tried either engine or transmission
We finished the swap late last fall and the car sat all winter. I started getting it into shape this week. The engine sounds excellent. The transmission was clunking into Drive and Reverse. Like a hard 'bang', one shot, after that it was fine. I suspected the ATF was (partially?) at fault. It looked finished, so I did a fluid/filter replacement. The fluid looked like chocolate milk and smelled burnt. I cleaned out the bottom of the sump pan - It had a good amount of swamp goop at the bottom and around the magnets. After the servicing, the trans is still clunking into gear but I had the car on stands and the wheels turn well, without any weezing or other noises from tranny. I used the right fluid and amounts as per Bentley Service Manual. I haven't driven it out of the driveway.
Is there a chance that the fluid, when driven and circulating through the transmission, could clear out the remaining junk and become (semi) smooth again? Or am I dreaming?
Thanks in advance guys!
here's the long story short:
Originally: 1991 E34 535i 3.4L with ZF 4HP22 automatic Transmission (engine was shot, tranny was excellent)
We did an engine/tranny swap using an E32 (1988 735i) 3.4L, also having a ZF 4HP22 transmission. I had never tried either engine or transmission
We finished the swap late last fall and the car sat all winter. I started getting it into shape this week. The engine sounds excellent. The transmission was clunking into Drive and Reverse. Like a hard 'bang', one shot, after that it was fine. I suspected the ATF was (partially?) at fault. It looked finished, so I did a fluid/filter replacement. The fluid looked like chocolate milk and smelled burnt. I cleaned out the bottom of the sump pan - It had a good amount of swamp goop at the bottom and around the magnets. After the servicing, the trans is still clunking into gear but I had the car on stands and the wheels turn well, without any weezing or other noises from tranny. I used the right fluid and amounts as per Bentley Service Manual. I haven't driven it out of the driveway.
Is there a chance that the fluid, when driven and circulating through the transmission, could clear out the remaining junk and become (semi) smooth again? Or am I dreaming?
Thanks in advance guys!
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