funky speedo - TDR Roundtable

funky speedo

03-26-2004, 02:12 PM

#1 (permalink)

RCCola

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Join Date: Mar 2002 Location: Madisonville Tn Posts: 76 Old Reader's Rigs Gallery

funky speedo

I just bought a '92 W-250 5speed. After a couple days the speedo/odo went wanky. Sometimes it's fine. Sometimes it's erratic bouncing from 0 to the actual speed. Sometimes it doesn't work at all. I searched several past threads about this and still am not sure how to determine the actual cause of the problem. Here are more details:
Cruise control works, even when the speedo doesn't
I put a drill on the gear drive and the speedo read normally (and steady) (but the speedo also worked briefly when I reassembled and hit the road.
The square drives seem to be solid--I pulled the drive gear from the case and screwed the speedo gear box to it and it felt tight, everything seems to spin freely.
I looked at the driven gear thru the hole for the drive gear (assuming I don't have my names backwards on drive(n) gears) and it is yellow and appears to be in good condition.

Reading the past forums I need to check the yoke nut and try some cleaner/dielectric grease but are there any other definitive tests to isolate the driven gear or the electric speed sensor?

Thanks and Hammerdown!

__________________
Roy

God Bless and HMRDWN

93 W-250 CC 4x4 CTD, getrag360,NP205 ,3.54 128k miles, Borg shaft, rs9000s, 2.5" SkyJacker fts springs, 295 BFG ATs, reman pump(stock), Old Blue specials, Isspro:boost, pryo, 3 3/8 tach w hour mtr ,BHAF, 16cm,Jake Brake, 4" 2nd gen down pipe to 4"flex to 3d gen 4" tail pipe, B&W gn hitch

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