4.0 swap speedometer not working - JeepForum.com

 
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post #1 of 8 Old 04-07-2013, 08:14 AM Thread Starter
Gigemags05
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Engine is running great, but the speedometer isn't working.

I used a new vss for a 91 yj, and bought an adaptor so the threads will match. I am using Hesco's harness.

Any ideas on why it might not be working?
Does anyone have pictures of how the vss should fit onto the speedometer cable?

Also, when installing, I pulled the small gear out. I put it back in but is it possible it isn't seated right? I figured it'd only go in one way with the teeth how they are.

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post #2 of 8 Old 04-07-2013, 09:53 AM
frhrwa
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sounds like the gear in the tranny or the cable .. most likely the gear..

I want to die in my sleep like my grandfather, not screaming in terror like the passengers in his JEEP!...
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post #3 of 8 Old 04-07-2013, 10:01 AM Thread Starter
Gigemags05
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Is there a specific way it has to go into the tranny? I'm sure that's the problem since I removed it. Any trick to it?
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post #4 of 8 Old 04-07-2013, 12:32 PM
frhrwa
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how would you like a JEEP FSM manual on a DVD that covers '81-'87.. but the tranny and speedo connection should be the same and most of the info will match up.. I can mail you a copy if you pm me name and address.. wayne (it helps a lot, sorry its not the '80 version)..

I want to die in my sleep like my grandfather, not screaming in terror like the passengers in his JEEP!...
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post #5 of 8 Old 04-07-2013, 01:41 PM
titomars
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Quote:
Originally Posted by Gigemags05 View Post
Is there a specific way it has to go into the tranny? I'm sure that's the problem since I removed it. Any trick to it?
If you are running the original trans yes it has to indexed correctly in the trans housing. The speedo gear sleeve (adapter) has lines and numbers marked around it's face. To line up and mesh the gear by its tooth count.

1981 Jeep CJ7 4.0 HO, AX-15, D300, D30, D44, SOA
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post #6 of 8 Old 04-07-2013, 01:50 PM Thread Starter
Gigemags05
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Thank you very much for the offer. I have an fsm for the cj, and when the 4.2 was in it, the speedometer worked great. But since I had to use a new vss and an adaptor for the 4.0 it isn't working now.
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post #7 of 8 Old 04-07-2013, 01:52 PM Thread Starter
Gigemags05
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Quote:
Originally Posted by titomars

If you are running the original trans yes it has to indexed correctly in the trans housing. The speedo gear sleeve (adapter) has lines and numbers marked around it's face. To line up and mesh the gear by its tooth count.
Ok, so there will be markings on the speedo gear I pulled out? I'm sure I put it back in the wrong way.
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post #8 of 8 Old 04-07-2013, 09:10 PM Thread Starter
Gigemags05
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There weren't any marks, but I was able toget the gear in correctly and the speedometer now works.
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