1999 MITSUBISHI NO ELECTRIC OVERDRIVE SHIFT

  • Tiny
  • mtrdude
  • 1999 Mitsubishi

1999 Other Mitsubishi Models 4 cyl Two Wheel Drive Automatic 153000 miles

VIN #JW6AAF1H3YL002649 / TRANSMISSION #8I0369.
This is a 1999 Mitsubishi Fuso cabover truck with a diesel engine & 3-spd automatic trans with an electronic (push-button) overdrive gear. The trans wasn't shifting right and the speedometer wasn't working so I replaced both the cable gear as well as the internal shaft gear (both were bad) and the speedometer works fine. The electronic overdrive button is located on the shifter handle and the dash light indicates whether it is in on or off position; the light is working. The transmission shifts normally from low to second to high gear but then won't shift into OD; truck will run around 50 mph but engine rpm is 3300 and dash gauge shows redline at 3500 rpm. Have a thought that the speed sensor might be bad but don't have any diagnostics to check nor do I know what a good sensor should ohm out at. Need suggestions or diagnostic procedure to find out what the problem is.

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Tuesday, September 8th, 2009 AT 9:15 AM

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  • Tiny
  • Docfixit
  • Expert
  • 18,993 posts

Hi
Input speed sensor on front trans. disconnect soleniod plug, see figure,measure ohms across term. 9-10. should be 560-680 ohms. same plug measure across term. 3-4 560-680 ohms. if out of range replace.


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_126.jpg


http://www.2carpros.com/forum/automotive_pictures/198357_Grafic_3_37.jpg


http://www.2carpros.com/forum/automotive_pictures/198357_Grafic_4_9.jpg


Hope this helps
Thanks for donate

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Monday, September 14th, 2009 AT 10:08 AM
  • Tiny
  • mtrdude
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Solenoid plug is only 8 pin, not 10 pin.

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Wednesday, September 16th, 2009 AT 3:23 AM
  • Tiny
  • Docfixit
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Did you locate speed sensors? If yes make ohm checks at sensor acrosss terminals.

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Thursday, September 17th, 2009 AT 8:08 AM
  • Tiny
  • mtrdude
  • Member

It has one speed sensor; since it is an 8-pin setup what # pins should I check and what should the resistance be?

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Friday, September 18th, 2009 AT 3:20 AM
  • Tiny
  • Docfixit
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560-680 ohms at sensor terminals

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Friday, September 18th, 2009 AT 11:31 AM

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