1994 Jeep Wrangler Speed Sensor Conversion Fix

JEEP WRANGLER
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MJSCHERTZ
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  • 3 POSTS
I have a 1994 Jeep Wrangler with a 1990 transfer case. The case has a speedo cable hook-up and the instrument panel is electronic. Is the a way to convert my transfer case to work with the speed sensor hook-up?
May 4, 2006 at 2:22 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Most of the cases are the same hole for the speedometer. You will have to take your old VSS, housing and assembly and mount it in your in 90 case. It will fit is it is the same maker.
May 4, 2006 at 2:28 AM
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MJSCHERTZ
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I bought it this way so I do not have the old VSS housing. Can I get a new one or maybe et one from the junkyard or something? What is the best way to go? Is it a hard job to change it?
May 4, 2006 at 9:12 AM
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LOSONE
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  • 1,616 POSTS
You need the entire thing from a junk yard including the internal parts that make the sensor work. You can probably get it from a tranny core at a salvage yard.
May 4, 2006 at 10:07 AM
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MJSCHERTZ
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Sounds like a big job. Is it something I could do myself? Or would it be easier to get a whole new transfer case? And if so, how can I get the spline count without taking the thing apart?
May 4, 2006 at 11:00 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Take it to a good local tranny shop (not a franchise) and explain the problem. If they have a core laying around they can fix it. You have the better of the two transfer cases it is much stronger. Good luck
May 5, 2006 at 10:23 AM
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Suggested Repair

Install a complete matching vehicle speed sensor housing and internal drive parts from a salvage-yard transmission or transfer-case core into the existing 1990 case. A local independent transmission shop can fit the assembly if a core is available; replacing the stronger transfer case is not necessary.

Conversation Summary

The owner has a 1994 Jeep Wrangler with an electronic instrument panel and a 1990 transfer case that only has a mechanical speedometer-cable drive, and does not have the original speed-sensor housing. The expert said the speedometer openings are generally the same and that a complete VSS housing and internal parts from a same-maker salvage core can be mounted in the 1990 case. Rather than replacing the stronger transfer case, the owner was advised to take it to a local independent transmission shop that may have a suitable core.

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