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#1
05-16-2012, 03:39 PM
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722.303 trans in a w123
Howdy, I'm hoping to help a friend out who has an older NA OM617 W123 wagon with a shot 722 auto trans. I have a 722.303 from a turbo diesel 617 300SD ( along with all the hardware and associated bits) and was wondering if it would be a straightforward swap into his car? Are there any size/bolt up issues? Control issues (linkage, vac etc)? Speedo issues?
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#2
05-16-2012, 04:11 PM
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I actually just did this swap. I have a W123 wagon that had a shot 722.3 trans so I bought a 722.3 SD trans as a temp. solution before I did a manual swap.
It will bolt right up with no hardware issues. The issue you will experience is if that SD transmission has the electronic speedo sensor, as it did in my case. The tailshaft is different between the geared speedos in the W123’s and the electronic ones in the same vintage SD’s. If it was from a 78-80 SD, there may not be an issue. But the 81-85 have IIRC an electronic speedo sensor. A tailshaft swap could be a solution.
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1982 300TDT 1991 190D 2022 Metris
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#4
05-16-2012, 04:43 PM
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Thanks! I was reading a bit about the same issue. I'm wondering how difficult a tail swap would be. It's too bad you couldn't just swap trans, cable, speedometers and all!
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#5
05-17-2012, 02:22 PM
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Quote:
There are threads on here that talk about the swap in general terms but no blow-by-blow accounts.... Thanks
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 Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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#6
06-10-2013, 12:51 AM
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Where is that speed sensor on the 722.303?
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84 300sd 2.47 dif 360k 26 mpg needs lots of love given to me in pitty 89 civic hatchback auto 140k 33mpgs soon to be low to mid 40's been in the family since mile 1 85 300d with unknown knock. driven over 30k with knock and still going. sold for $800 
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#7
06-10-2013, 03:55 AM
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Quote:
http://www.peachparts.com/shopforum/diesel-discussion/323259-722-303-bits-photo-shoot.html
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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