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Speedo problems

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Bearindabush

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So, I found this when I pulled the speedo drive chasing a non working speedo. Anyone seen this before? I got a repacement which was different, which made the speedo move but not properly, eg; speedo still increasing while slowing. Any thoughts?? '94 TD27 4X4
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DSC_0054.JPG
 

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tweak'e

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i would test the output.
not sure if its a pulsed output or voltage. but most likely you will get a voltage reading and that should go up as you drive. if it goes down as you go down in speed then its most likely instrument issue.
if its goes unsteady then i would guess the speedo drive gear is loose on the main shaft.
i don't have the d21 book but i suspect its similar to the early td27 d22's.
 

izzibri@gmail.com

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is it worth pulling out new one to see if the gears are matching ,you would see exessive wear imediately. could there be plastic stuck in the internal gear box drive
 

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