speedo gear

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scottsxj

NAXJA Forum User

Location

richmond va

• Oct 9, 2005

• #1

would not putting the speedo gear in the right way after an SYE install cause the speedo to not work at all. I think i got the tooth count messed up so it went in the worng way. BUt i was thinking if it went in the wrong way it should just bee off some, but still work. What is the stock tooth count by the way. Thanks

scott

 

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xjbubba

NAXJA Member # 1524

Location

santa barbara, ca

• Oct 9, 2005

• #2

Don't know if all years are the same, but on a '92 and earlier XJ NP231 the speedo gear housing is an eccentric. As you rotate the whole assembly, the gear will either get closer or farther away from the transfer case shaft. So, yes, it's easy to install incorrectly such that the speedo does not operate. The housing has marks indicating ranges that include each possible speedo gear option. Your FSM will give you the procedure for correctly installing the gear.

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Oct 10, 2005

• #3

You didn't mention your year, but yes, you have to rotate the housing properly to get it to read correctly.

That is what I needed for the 40-tooth I'm currently running. Yours may vary.

 

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scottsxj

NAXJA Forum User

Location

richmond va

• Oct 10, 2005

• #4

mine is a 92 with the NP231, 4.0, 5spd tranny. See woldnt my speedo just be off if i didnt have it aligned righ, because right now it is not working period. Thanks for the replies

 

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xjbubba

NAXJA Member # 1524

Location

santa barbara, ca

• Oct 10, 2005

• #5

The '92 has a cable attached where Yucca-Man shows an electronic pick-up; otherwise, it's the same. If you don't have the indexing correct for the speedo gear installed, your speedo will not work because the gears are not meshed with the output shaft of the transfer case. Rotate the speedo housing until you get contact.

 

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markg

NAXJA Forum User

Location

nj

• Oct 10, 2005

• #6

my 91 has elec and not the cable.i dont think the 92 had a cable.

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Oct 10, 2005

• #7

It doesn't matter whether you have a mechanical pickup or electric - if the housing isn't clocked right in the first place you won't get the speedometer gear to rotate and it won't register anything...

 

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scottsxj

NAXJA Forum User

Location

richmond va

• Oct 11, 2005

• #8

cool, thats just what i needed to know, and mine has the electronic cable, not that that matters