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#1
01-17-2012, 10:40 AM
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Which Seals to Replace On E420 Trans Swap??
Hey Forums Friends;
I have a 722.366 Transmission from a 1994 e420 w/118,000 miles Already removed from the chassis. It will be installed into another 94 e420 with toasted Trans.; so Absolutely NO Issue with Fitment... My question for Anyone in the know; "Exactly" what "Seals" and/or other parts should i replace on the Trans. BEFORE installing it into the car?? I will change the trans filter and fluid once trans is installed into the car. What seals are there - other then the front pump seal, rear seal and main seal? I am Hoping to extend life/function of trans for as long as possible by doing this preventive maintenance Now and Not having to worry about it for Quite some time....Any and All advise/recommendations are Greatly Appreciated. THANKS All............Chance 
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#2
01-17-2012, 02:10 PM
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Before installing I would replace the front pump, reverse clutches, 3rd gear clutches and piston seals at the front left and right hand side of the trans. These item will greatly extend the life of the tranny and can be done in about an hr since you already have it removed.
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DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY. 1986 190E 2.3-16 Pearl Black!! 1987 190E 2.3-16 Smoke Silver!! 1986 190E 2.5-16 Pearl Black!! 2004 CLK 500 Cabrio Designo package!! 1994 E320 Cabrio Red with black top!! 1985 500 SEL Anthracite Grey !! 2011 Subaru Impreza STI 380HP (Yeah Baby)
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#3
01-17-2012, 03:07 PM
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That's the first I've heard that third gear clutches should be replaced. Is that a common wear item?
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1993 400E, 256,000 miles (totaled) 1994 E420, 200,000+ miles 1995 E420, 201,000 miles
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#4
01-18-2012, 06:25 AM
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The third gear clutches I change because it's one more set of clutches that I can get to while having the front pump out.
__________________
DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY. 1986 190E 2.3-16 Pearl Black!! 1987 190E 2.3-16 Smoke Silver!! 1986 190E 2.5-16 Pearl Black!! 2004 CLK 500 Cabrio Designo package!! 1994 E320 Cabrio Red with black top!! 1985 500 SEL Anthracite Grey !! 2011 Subaru Impreza STI 380HP (Yeah Baby)
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#6
08-16-2013, 04:38 PM
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I'm preparing a similar swap. This is the list I have gotten from this thread
Front Pump & Seal Rear Seal Main Seal Piston Seal 3rd Gear clutches Any other ideas? I recently replaced the Tranny mount and flex discs so those are good.
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 77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)  83' 300SD, "The Superdon" 325k+ @ 28mpg 95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg 95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head  99 Suzuki Intruder "Trudy" @ 45 mpg
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