Erratic, jumpy speedometer
Posted: Wed Jan 29, 2014 6:10 pm
Over the last few months my speedometer has been reading erratically and making noises when it was cold, everything operated fine once the van was warmed up. The noise was very loud, when it first occurred I thought my drivers side wheel bearings were thrashed.
I hoped that it was probably oil/grease migrating up the cable into the back of the speedometer. Which proved to be the case.
Fairly easy fix, just remove the speedo/tach cluster, remove the speedometer from the cluster and clean the grease out with brake clean and paper towels.
Don't attempt to clean the speedo without removing it from the cluster, brake clean will cloud the clear plexi glass.
When reassembling the speedo cluster be sure that the speedometer and tach needles point to zero, otherwise they will read incorrectly after re assembling.
Prior to re assembling go under the van and undo the speedometer cable from the transmission tailshaft, remove the inner cable completely, spray brake clean into the speedometer cable outer casing from the dashboard end to clean out residual oil and grit, don't be shy with the brake clean. Wipe the inner cable and lubricate with thin film of light oil. re-install the inner cable and assemble the dash.
I hoped that it was probably oil/grease migrating up the cable into the back of the speedometer. Which proved to be the case.
Fairly easy fix, just remove the speedo/tach cluster, remove the speedometer from the cluster and clean the grease out with brake clean and paper towels.
Don't attempt to clean the speedo without removing it from the cluster, brake clean will cloud the clear plexi glass.
When reassembling the speedo cluster be sure that the speedometer and tach needles point to zero, otherwise they will read incorrectly after re assembling.
Prior to re assembling go under the van and undo the speedometer cable from the transmission tailshaft, remove the inner cable completely, spray brake clean into the speedometer cable outer casing from the dashboard end to clean out residual oil and grit, don't be shy with the brake clean. Wipe the inner cable and lubricate with thin film of light oil. re-install the inner cable and assemble the dash.