amount of time to change transmission fluid in 1984 300DT

[merc lover]

I need to set aside enough time to change the transmission fluid in the 1984 300DT. I want to change out both the tranny and the torque converter.

Is it best to allow the old fluid to drain out overnight? I'm thinking around 4 - 6 hours to change it out.

[Sugar Bear]

There is very little benefit in letting in drain all night. If it is convenient to do so then yes do it, if inconvenient then don't.

Time 4 hours on the high end... probably closer to 2.5 if you are new to the process and need to find tools etc.

Don't overtighten the pan.

Good luck!!!

[83w126]

Make sure you get the seal for the torque converter drain too. It will be much easier with a helper to line up the drain plug otherwise it may take a while of turning the engine slightly and crawling under to check.

[R.Diesel]

Any benefit of getting the last mL out is outweighed by potential contamination associated with leaving the transmission open to the atmosphere. Just change the fluid and be done

[merc lover]

Originally Posted by 83w126

Make sure you get the seal for the torque converter drain too. It will be much easier with a helper to line up the drain plug otherwise it may take a while of turning the engine slightly and crawling under to check.

Are you saying purchase a new seal for both the drain plug and the torque converter drain plug? Can I buy the new seals from the dealer? Do you know the mercedes benz part number for the seals?