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Oil leak on 290GDT Auto transmission- 722.3

Dikfrik

G-Wagen Club SA
Joined
Oct 10, 2008
Messages
682
Likes
29
Location
Empangeni, Zululand
#1
Gents

I have noticed an intermittent oil leak on my auto box, apparently mostly when it is stationary with oil dripping of the rear of the box from the lip of the oil pan but more on the LHS. At first n noticed a few drops on the floor and then after standing over night and a day or so there was quite a patch on the floor (maybe 300mm dia) - first thought it was the pan seal and re-torqued the bolts and cleaned of the dirt of the side of the box. Drove it a small distance and parked again and for a day or two all seems better but then this morning after standing for two days there is a patch again! Looking carefully it looks like it comes from just below the selector arm shaft and the park lock switch next to it above the pan seal lip.

Anybody had an experience like this?
 

Antony

G-Wagen Club SA
Joined
Nov 17, 2008
Messages
869
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87
Location
Johannesburg
#2
Hi Freek,

I had a similar issue on my 290. It was the shifter leakage seal that was cracked right through. I suppose they get old and hard with age. Here is a link to a video that I used to fix it.


It really was very simple. I used a large flat screwdriver to remove the old seal (careful not to damage the metal tube it sits in) and then a similar sized socket to the seal itself to tap the new seal in perfectly straight with a hammer. I didnt have the fancy seal removal and installation tool.

Watch that you don’t bend the edge of the oil pan when you take it off. That creates a new leak. There are six bolts, undo the ones on the corners first and then the two in the middle, that way you won’t bend it so easily. The thing is SOFT. It’s easier to remove and install if you first get the stabilizer bar out of the way (helpful hint #25)

When you install, make sure the gasket stays flat against the transmission, otherwise you’ll be doing it again. The bolts are only torqued to 8nm, just to hold the seal in place. Too tight and you’ll have a new leak

Call me if you have any questions

Good luck
 

Andrew

G-Wagen Club SA
Joined
Oct 8, 2008
Messages
3,449
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345
Location
Brits
#3
Is THAT where it leaked?

Btw jacking up the body a bit (as opposed to the chassis) gives enough clearance to remove the pan without scaring the stabilizer.
 

Antony

G-Wagen Club SA
Joined
Nov 17, 2008
Messages
869
Likes
87
Location
Johannesburg
#5
Originally that was the leak, until I damaged the pan, things are soft as margarine in December and bend if you look at them too long. So NOW that is where it leaks. No sign of the original leak though

New pan on order.

Thanks for the tip about jacking the body up. I didn’t think of that. The stabilizer bar swings out of the way if you undo the two clamps that hold the curved part. No need to undo the big bolts but jacking would be easier.


Sent from my iPhone using Tapatalk
 

Alan

G-Wagen Club SA
Joined
Oct 12, 2008
Messages
3,620
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Age
56
Location
Pretoria
#7
If you have the dimensions or sample go to a local Seal Centre. They usually have something compatible.