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#1
10-13-2020, 02:04 PM
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Transmission fluid oil pan - parts place sent a deeper pan
Hi everyone,
I recently discovered a hairline crack in the transmission oil pan of my 1974 W115 240D automatic. It's in need of replacement! The replacement OEM item (115-270-06-12) would be $400CAD from my local MB, so I found a good condition used item at a parts place in the US - supposedly the identical item. Anyway, when it arrived the item I was sent was actually about 3/4 inch deeper than my original item, although the fitment is the same. I googled the part number of the old gasket that came with it and seems like it's originally from a R107. So, does it really matter if my new pan is deeper than my old one? Surely I'd just have to use more transmission fluid. Annoying situation I know, but getting parts up to Canada takes a while and I'd have to go through the hassle of returning this item, getting the refund (that's two weeks gone already) while ordering a replacement item. What are people's thoughts? Send it back and lose a bunch more time or just deal with a deeper pan (and the parts place offered some credit on a future order as a result of the mix up). Thanks
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1975 W115 300D Last edited by j-galap; 10-13-2020 at 02:24 PM. 
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#2
10-13-2020, 02:14 PM
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I see no particular issue. I believe the pan is no lower than the engine pan. So it does not impact ground clearance?
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#3
10-13-2020, 05:41 PM
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If for some reason it causes a problem have the old pan's crack welded up.
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#4
10-13-2020, 07:25 PM
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j-g:
Inasmuch as the filter is screwed to the valve body (rather than being retained by the pan), there will not be a problem of the filter dropping off. The transmissions used with the V8 engines, in addition to having a deeper pan, also had a deeper filter.
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#5
10-14-2020, 02:05 PM
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As long as it isn’t a ground clearance prob. Really don’t want to accidentally bottom out on your trans pan. Otherwise, the pan really serves little functional purpose. In some cars, folks upgrade to a larger pan.
For the money, it’s probably cheaper just to weld up the old one...
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#6
10-14-2020, 10:04 PM
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The only issue I can think of is not getting an accurate reading on the dipstick and possible overfilling. A deeper pan means you'd have to have more fluid inside to reach the marks on the dipstick. The amount of fluid required might not be much and may not be a problem though.
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123.
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