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Old 01-23-2011, 06:58 PM   #1
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Rick J Fisher's Avatar
Alpine Owners Club
Join Date: May 2008
Location: Chatsworth CA
Posts: 160
Flakey Speed Sensor on 07

While driving; speedo goes to zero, transmission locks in 5th, no exhaust brake or cruise control, light says Missed Shift. Killing power at battery switch resets it. OK for 5 minutes or two hours then fails. Sometimes does not fail the whole way home. Milliemae had similar problem, had speed sensor replaced to fix. I would like to replace it myself. Where is it on 400ISL and what does it look like?

Rick J Fisher, BW is Judy
2007 Alpine 34FDDS Limited SE
2003 Jeep Rubicon or a 1995 Toyota Tacoma
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Old 01-24-2011, 05:46 AM   #2
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Vintage RV Owners Club
Join Date: Jul 2009
Posts: 182
Most of them are on the transmission where the output speed can be measured, say near a drive shaft or output shaft. It should be a round electronic piece with two wires in a plug, held in the transmission by a clamp bracket and small bolt. If you're sure that's your problem, you can go buy a new one, and crawl under the coach to look for the part that looks like the one in your hand.
Two wrongs don't make a right, but three rights make a left.

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no shift, speed sensor, speedometer

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