The bottom of my bellhousing has some red (transmission fluid) drips (also on garage floor). The only source of the leak I can think of is the transmission front shaft seal. Anything else come to mind?

As far as I know this seal can be simply pulled and a new one installed once the trans is out, correct.

Thanks,
John (1986 190D - Automatic)

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!

You may want to check the converter drain plug. Its not likely but worth a look.

Good idea, I checked that; no leak there.

Any other ideas?

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!

Only things that come to mind require pulling the tranny. I'm trying to pull mine now.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

I replaced the front shaft seal in a Chrysler automatic a few years ago that had a similar leak, I just want to make sure there is nothing else hidden when I remove the MB trans that could be a likely source. Is there anything else on the engine side of the trans besides the front shaft seal?

Here is a pic taken this morning:

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!

Mine was leaking a lot from that seal. I pulled it and replaced the seal and it still is leaking from somewhere.

At least on the W126 they are pretty easy trans to pull. If you can get acess to a lift you can do it in a couple of hours.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Next best is a pit.

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!

True, anything is better then jack stands and a creeper.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

If the seal is leaking, it's probably because the front pump bushing is beat. Also, it could be a bad gasket between the pump and case. IMHO, it makes sense to change those too since you already have the trans out. Oh, and swap out the B3 friction plates if you have a long reverse engagement delay. BTW, it's pretty easy.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.

There is a oring seal around the pump that seals it to the case .That was leaking on my 300 SDL when I bought it .The oring was hard as a rock when removed.

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89 Ford F3504x4CC 7.3 IDI turboed Intercooler and running on wvo now powered by a 1997 Cumins
87 300SDL on bio and wvo killed by chevy truck 5-24-06
1999 E300TD black with gray int.

The front pump o- ring is the number one cause of a bell housing leak with the engine not running.