I have a 1980 300SD w116 with a slipping transmission. It will go into each gear,very slowly, and needs to be revved high to actually move.

So far, I have done only a filter and fluid change, although I haven't drained the torque converter yet (just discovered that). No change in her condition.

Is my baby hooped for sure, or is there something next to try?

Thanks,
Dunl

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79 300SD - $50 out of pocket purchase
03 Dodge Ram 3500 CTD
2003 VW Jetta TDI