'94 E420 Transmission Seals "Cost Estimate" - PeachParts Mercedes-Benz Forum

chance2benz · #1 12-07-2011, 10:26 PM

Hello Forum Brothers..........
I am in need of advise, suggestions, experience, thoughts, 'gotchas', etc.
i have a '94 E420 w/ 237,000mi. that has a "Serious" Transmission fluid leak.
I can put a Gallon of trans fluid in to get it to proper level and it Drives/Shifts very well; However while driving its leaking A LOT ; and within 20-30 miles- enough fluid has been lost that starts the flaring and Not shifting to next gear until eventually Not moving forward At All Until i add More fluid. Also when i park it for a few hours and/or overnight. It loses quite a bit of fluid right there where it sits.
I am Assuming that Transmission itself is Good; because of how it runs the short time fluid remains at proper level prior to leaking itself out.
I am planning on replacing the front pump Seal and the rear seal on the transmission........ So can anyone who KNOWS; Or have had similar Experience and repaired it- Please give me a general idea of the proper/Fair cost of Labor $$. If allowed i will provide my Own ATF Fluid and allow repairer to get proper seals And Replace/Install them. Are there 'more' than those two seals that can be leaking as well? But i am mainly seeking a "Cost
Estimate" for the LABOR $$ of 'replacing' those two (front pump seal And Rear seal).....In the Hopes of Not being taken advantage of.
Any and All Advise, Suggestions, and Experience is Greatly Appreciated....
THANKS; In advance .....................Chance

ps2cho · #2 12-07-2011, 11:27 PM

$1500-$2500 is ballpark depending on what is done. A full rebuild $2500 is reasonable.

The seals only will cost no more than $50.

Whatever you do -- BARE minimum REQUIRED items are front pump seal and B3 reverse bands.
At that mileage too, have the TC height measured.

Where is it leaking from? You cannot possibly be losing that much fluid that quickly from a pump seal...You have a serious leak probably from the pan gasket.