Reviewing the various documents to replace the primary pump.

My understanding is I must remove the front cover #8 to access the bolts #11 that hold the pump to the front cover correct?
So when I do this I should purchase and replace the #1 and #2 seals.

Is this as deep as I need to go with the tranny on the bench?

Will I need anything else here?

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91 300GD SWB with transplanted 87 OM603 turbo motor

Never mind I reread the excellent post by WHunter and understand the procedure.

Thanks

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91 300GD SWB with transplanted 87 OM603 turbo motor

Could the torque converter be at fault?

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91 300GD SWB with transplanted 87 OM603 turbo motor

Actually, instead of pulling the cooler lines first, just start the car get under and see if the torque converter is even spinning....

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

The torque converter is attached to the flywheel. It will be moving at the speed of the engine.

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91 300GD SWB with transplanted 87 OM603 turbo motor

Diving in and randomly changing parts is a bad idea. You need to do a pressure test.

Agreed.

I did remove the top trans cooler line, started the engine, moved the shift selector through the gate. No fluid, not a drop came out of the cooler line hose.

Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor

X2

Pressure test if you have the technology

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Ya...I was just wondering if the flywheel bent somehow and got the TC stuck or the bolts sheered off however very unlikely...just was a quick and easy look.

Pump failure confirmed. It should fire out of there like no other regardless of shift selection.

Plan the removal!

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

Removal scheduled for tomorrow morning.

Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor

OK Got the G back and sure enough the primary pump was kaput. They pulled the tranny replaced the pump, all related seals and the pressure modulator (per my request). It now runs amazingly well!

Thanks for all the help.

Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor

Glad to hear

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

when the engine is shutoff half of the torque converter drains back to the pan due to gravity, if the pump is not working or the flexplate has broken or the bolts holding the torque converter have sheared off (they are mandatory to renew every time they are disturbed) the transmission will not work as the main pump doesnt work.

You will also see a high level on the dipstick. To test follow was ps2cho said, undo a cooler line and see if you get any fluid pumping from it as soon as the engine starts.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I just wanted to post a big thank you to the contributors of this forum. I had this exact problem on my 94 e 320. I ordered a new flange from the dealer and am keeping my fingers crossed that the output shaft is ok. Thanks again for saving me an expensive trip to the transmission shop!

I have no grasp of the transmission systems but from expereince know that when overfilled the trans loses forward traction and will work in reverse. (95 E320) and lowering the fluid does not correct the overfill. It will still keep slipping..One must drain the fluid and then add back to the full level slowly with it running and parked. Then you are good again.. Very curious why if anyone cares to explain..