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#1
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Anyone know Speedo gear specs?
The odometer in my 85SD hasn't worked for a while. Prices are all over the place for having the cluster worked on. Most places apparently only repair what is broken now which I don't consider to be a "rebuild".
One place offered the plastic gears at $20 each + shipping. (Usually only 3 of 4 plastic gears go bad.) I've found sources where gears are only ~ $5.00 each but I need to know the details. Hopefully, I can find/install the gears & post the source.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#2
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I just rebuilt a customer's 85SD... I could go look up the specs, but I think it was an 18tooth with the standard 40's
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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! |
#3
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The odometer in my 85 SD was not working when I purchased it a few months ago. I purchased replacement gears from odometergears.com and replaced them myself. It is a fairly easy repair and the instructions they supply are very clear. The parts are not cheap, but they sure look more robust than the failed pieces.
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#4
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I second odometergears.com. I fixed an SD odometer with the gears from there. It was a 10min fix.
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#5
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Quote:
Since posting, I've taken my speedo apart and the black gears and the top white gears are crumbling. There appears to have been another small black gear on a 3rd shaft that is completely gone. Worse than paying $80 including shipping for a few pieces of round plastic would be to pay and find something else is needed. The gear thickness appears to be 2.5mm. The shafts are 2mm. From what's left, I can't tell even close what gears mesh. It looks like there are teeth on the bottom of the top black gear that mesh with the top of the bottom double white gear. That would leave the top black gear to mesh with whatever goes on the 3rd shaft. I've found several sources for metric gears but need number of teeth and diameter of the gears. I may get to a yard tomorrow & will report bck if I find anything interesting.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#6
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dieselgiant has a good odometer repair link which i used to repair my w123 odometer. the same principles could probably be applied to the w126 if the tin gear is the culprit
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i know Jim Smith. i don't actually know him, but I know of him
http://imageshack.com/a/img923/6201/RQ1H6A.jpg |
#7
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When I replaced the 'E3' gear in the the SD and 300SEL I used:
13 tooth = 2.88:1 axle 16 tooth = 3.46:1 axle I guess a 14 tooth would work for the 3.07:1 diff and the 12 tooth for the 2.47:1 diff.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
#8
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every gear I've had to replace in an SD has been plastic. (more of a waxy consistency actually) TOTALLY simple compared to the 123 odometer repair. just a few screws, and the gears are in your hand. cut off the hub of the tiny drive gear, pull the other two off with your fingers, and put the new ones on. simple simple simple |
#9
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#10
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I would have to third odometergears.com I like Jeff, and he knows the odometers.
Sev, these are totally different than a 123.
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79 MB 280 SEL Euro 133k 77 MB 450SL 154k 05 Mustang GT Vert (3) 104k 12 TSX Wagon Tech (66k) (192k) 06 Subaru Outback base (135k) 164k 16 Acura MDX (109k) 111k 18 Silverado 2500 LTZ Midnight (212) 56k 97 Ford Ranger 163k 11 RAV4 154k 01 Escape 173k 04 Honda Pilot 292k 1967 Mustang (Resto Project) 1968 Mustang (Parts Bin) 00 Ford Ranger 124k |
#11
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I have to fourth odometergears.com. I replaced the gears in my 85 about a month ago, very simple. I even used a dremel to add the 400 miles I lost while waiting for them to come in!
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----Adam 1985 300SD 322,000 |
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