how to change the tranny "pilot bushing" (leak) - Mercedes-Benz Forum
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#1 (permalink) Old 11-25-2008, 02:42 PM
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how to change the tranny "pilot bushing" (leak)

hey i have a 2000 c230 with about 60,000 miles . i changed the tranny fluid/filter about 3,000 miles ago and now i am noticing a small leak . so, i got under the car i realized it was something just above the pan on the front passenger side. it was round and looked to be screwed in possibly. so, i called the dealer and they said it was a common problem and was called the pilot bushing. i am having trouble finding anything that has that name, but i can always get it at the dealer. they want $130 to install it so i am hoping that someone here can give me more info and some advice about how to change this and where i can buy one myself to save a bunch of $$. any info would really help , thanks alot to all
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#2 (permalink) Old 11-25-2008, 03:28 PM
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You have an auto trans correct? Probably a rear main seal leak. Pilot bearings, as far as I know, are in manual transmissions.

Michael
1986 190D, 5 Speed
1985 Porsche 928, 5 Speed (32v)
1980 Porsche 928, 5 Speed (16v)
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#3 (permalink) Old 11-25-2008, 03:35 PM
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yes it is an auto and i did find the part on autohauseaz.com and it is called the tranny bushing/oring combo. about a 6 dollar part. this is definitely where the leak is. thanks
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#4 (permalink) Old 11-25-2008, 04:35 PM
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i guess i should also ask how much fluid i am going to lose when i change this, without removing the pan, that way i can get some with the part. thanks again
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#5 (permalink) Old 11-25-2008, 05:18 PM
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Originally Posted by baknforth101 View Post
i guess i should also ask how much fluid i am going to lose when i change this, without removing the pan, that way i can get some with the part. thanks again
Just put back in what comes out.

Michael
1986 190D, 5 Speed
1985 Porsche 928, 5 Speed (32v)
1980 Porsche 928, 5 Speed (16v)
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#6 (permalink) Old 11-26-2008, 09:36 AM
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i have read on here that i should use electrical contact cleaner on the parts before instaling the new one. is this recommended?
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#7 (permalink) Old 11-26-2008, 10:09 AM
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Post Contact Cleaner

You should be OK with that. The point is to make sure the parts are clean.

You probably will not lose much fluid since what you are removing is above the Pan.

Is this the Shifter Bushing you are replacing?

Good Luck!

C as in 220
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#8 (permalink) Old 11-26-2008, 10:51 AM
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it is called by the dealer the pilot bushing but kind of looks like a black plastic shot-glass shaped item that is just above the pan on the front pass. side . you rotate a white piece of plastic and remove the harness with 13 pins and then clean the electrical connectors and reinstall. hopefully i dont lose too much fluid cause i only have 1 extra quart and quite a bit has already leaked out due to the o-rings leaking. i think i have this figured out due to the AWESOME info both here and online in general (i did call my local dealer as well, not that they tell the truth) you guys on here kick ass
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#9 (permalink) Old 11-26-2008, 10:59 AM
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Post Wiring Plug Seal

So is it the seal around your Wiring Harness Plug? That is a common problem and often causes serious Tranny failures when it becomes wet with fluid.

So they call it a Pilot Bushing, that's good to know. Usually a pilot bushing is in a Manual Clutch as Metafly stated.

Good catch!

You saved yourself a bundle by catching this early and doing it yourself!

C as in 220

P.S. Sometimes we take down names too!
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#10 (permalink) Old 11-26-2008, 12:35 PM
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the only thing i am not sure of is whether or not , and how much, electronic parts cleaner spray that i need to use and what to use it on. any ideas?

2000 c230 with 75K
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