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Toyota Repair/drivability problems.

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Expert: Ted Ritter - 6/27/2009


Question
hello,I own a 91 4 runner that has a speedometer that goes crazy on occasions and lately when it does,the car seems to pop in neutral.No power,i pull over put in park and back into drive,sometimes works.the trans oil and filter was changed and still acting up.Could the speed sensor be bad?is this an easy fix.THANKS

Answer
Possibly the speed sensor, it's relatively easy to replace, it's on the transmission tailshaft housing and has one 12mm bolt on it. Is the check engine light on? Normally the speed sensor doesn't cause the transmission to into neutral or seem to do so, the transmission may be slipping which would be another concern since the slipping of the clutches will cause the output shaft to stop rotating, the speed sensor receives it's revolution signal from this output shaft.

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Ted Ritter

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I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for almost ten years an have answered over 16,000 questions helping Toyota owners with their problems without any compensation, some of my answers are published on many other websites via google and other search engines. AllExperts recently added a new feature which allows questioners to donate to experts on the site, any amount of donation is very much appreciated, to make a donation just click on the DONATE button.

Experience

Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician.
Certified Hybrid Vehicle technician.

Education/Credentials
Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified. Toyota technical training: Engine Automatic transmission Manual transmission Drivetrain Electrical systems Brakes and chassis Air conditioning Engine performance and diagnostics Hybrid systems

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