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#1
09-27-2011, 10:52 AM
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Speedo not right.
I'm not sure if this is the right forum for this.
The speedo does not read right, your going fast than is says. It's a 1983 380SEC that has a motor, tranny and dash from a 1983 300SD W123. Not sure how to correct this issue. 
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#2
09-27-2011, 11:35 AM
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By changing the Dash, I assume you mean the cluster was changed from the SD. If the Differential is the SEC original, then it is a 2:47 ratio. the SD used a 3:07 81 - 84 and a 2:88 in 85.
The Spedo and Diff are geared together. all MB trannys are 1:1, except for the 5 spd manual with OD. Look at the Diff. on the lower left corner. scrape off the gunk and some numbers will show. the last 3 are the ratio. Charlie
__________________
there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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#3
09-27-2011, 12:01 PM
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Hmm
Quote:
Did you mean a 1983 300D W123 ?? Or a 1983 300SD W126 ?? .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#4
09-27-2011, 01:52 PM
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The guy I got it from said it came out of a 300CD W123 1983, then told me he was wrong it was a 300SD... That's what I have to go on.
Quote:
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#5
09-27-2011, 07:10 PM
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OK
Quote:
A W123 gauge cluster will NOT fit or function in a W126 chassis . It probably is from a 300SD = W126 chassis. Here is a list, if you are interested. US Model Chart to 1946
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#6
09-27-2011, 10:52 PM
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I think I have an SEC cluster on my bench... it may be geared for 227 though...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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