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  #1  
Old 01-01-2008, 11:44 AM
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Join Date: Aug 2007
Location: Mckinney,Tx
Posts: 53
300d 2.47 swap/speedo?

Looking for a 2.47 pumpkin that will fit into a 300d. I know this thread has been started before, but cannot find info on converting a mechanical speedo to an electronic one. I located a 2.47 differential with an electronic pickup instead of the mechanical one. I thought i saw a diy for the electronic speedo replacement, but cannot find the link. Can anyone point me in the right direction? Or can i replace the electronic pickup with a mechanical pickup?

Thank you anyone,
Jesus M.
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airedale2 Welcome to Texas
1984 MB 300D 266,000
1993 Nissan PU 271,000
2002 Tahoe 122,000
2004 VW TDI 75,000
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  #2  
Old 01-01-2008, 11:48 AM
ForcedInduction
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The pickup is in the transmission, not the differential.

You can swap the pickup system in the transmission tailshaft housing. As for the speedo/sensor wiring, you're on your own, I have no idea.
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300d 2.47 swap/speedo?-auto-tranny-cable-speedo-drive4.jpg   300d 2.47 swap/speedo?-auto-tranny-cable-speedo-drive5.jpg  
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  #3  
Old 01-01-2008, 01:05 PM
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Join Date: Aug 2007
Location: Mckinney,Tx
Posts: 53
2.47 pumpkin

Forcedinduction,

Thank you for the info. I found a seller down the road from me that has a 2.47 pumpkin for sale. I did not realize that the speedometer gear was in the transmission. By any chance could you tell me where the identification numbers are on the outside pumpkin to identify a 2.47 rearend and what they should be? I saw some old posts you had from about two years ago regarding the 2.47. Could you tell me what year speedo would work also? This is for a 84 300d.

Thanks,
Jesus M.
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airedale2 Welcome to Texas
1984 MB 300D 266,000
1993 Nissan PU 271,000
2002 Tahoe 122,000
2004 VW TDI 75,000
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  #4  
Old 01-01-2008, 01:16 PM
ForcedInduction
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Should be any W126 380, 420, 500, and 560SEL. The 300SE ,SEL used a 3.46 ratio and all the diesels were a 2.88 or 3.07. On the back of the diff there will be a bare bit of metal sticking out past the cover, clean the grime off and it will have the ratio stamped on it.

Any speedo from an MB that had a 2.47 diff will work at the right speed. Getting it to fit may be a different story.
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  #5  
Old 01-01-2008, 01:45 PM
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Join Date: Aug 2007
Location: Mckinney,Tx
Posts: 53
2.47 info

Forcedinduction,

Thank you very much for your help.

Jesus M.
__________________
airedale2 Welcome to Texas
1984 MB 300D 266,000
1993 Nissan PU 271,000
2002 Tahoe 122,000
2004 VW TDI 75,000
Reply With Quote
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