Occasionally the van will lurch a bit, like at a stop light. It also sometimes feels like it forgets what gear it is in, and drops down a gear. The engine races, the speedometer pegs out for a minute and then it returns back to normal (at least as normal as this van ever gets.)
Ck the wires going on the output sensor. You may have a wire starting to break or a bad output speed sensor.
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Master Chassis tech, Transmission
Automatic and Manual and Suspensions.
Also repair front and rear diffs and all engine
repairs inc Diesel. A/C repair too.