Transmission speedo housing

Transmissions and Rear Ends

  1. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    So i was installing a new speedo cable on the housing last night and noticed after I pulled it apart it seem to have eaten itself alive. The one bushing under the speedo gear ripped apart and it started fraying the snout of the housing where the gear sits on it. Ive been seeing that you guys reverted back to the metal housings. Anyone know who sells them? Also I just wanted anothers answer to this..... Iused the calcultors online for driven gear teeth numbers and im getting mixed answers. Im currently running 255/35/20s on the doba which averages out to a 27.03 tire size. I had the rear set out and is currently being rebulit with 3.55 gears and so far the closet I got to an answer was a possible 34 tooth gear? Any thoughts?
     
  2. volare 77

    volare 77 Well-Known Member

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  3. DCAspen

    DCAspen Well-Known Member

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    You can use an A-body cable that is only a couple inches longer.
     
  4. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Im guessing any year a body up till 76? And does the speedo gear have to fall into the parameters of the housing to work correctly?
     
  5. volare 77

    volare 77 Well-Known Member

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    As far as the cable it would need to be 76 and before to have the screw on piece at the trans. As long as the end at the speedo is the same as yours you will be good. 76 77 used a different end on the cable at the speedo but I think they went back to the older style clip after that. Pull out your old cable and measure it and see how it attaches to the speedo. Do you have cruise control??? That would make a difference in the cables. The housing I have would work with a 34 tooth gear.
     
  6. volare 77

    volare 77 Well-Known Member

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  7. volare 77

    volare 77 Well-Known Member

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  8. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    So then a speedo cable out of a 70 dart would work fine? I had cruise but eliminated it. So i got a cable from a 80 mirada without cruise and just went that route. The link to the housings you sent, I assume will also work with the 34 tooth gear as well?
     
  9. volare 77

    volare 77 Well-Known Member

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    yes, you rotate the housing to the gear size you are installing. I`m not sure what end is on the speedo cable for a 70 dart. Take a look at one for a 76 dart
     
  10. DCAspen

    DCAspen Well-Known Member

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    70 Dart will have a screw on housing
     
  11. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Alright. Cool. Thanks for the info guys.
     
  12. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Just one more thing..... How does the gear lock into the housing on these metal ones? Only for the fact that the plastic was held by a c clip
     
  13. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Whats the difference between the short shaft and long shaft gears?
     
  14. XfbodyX

    XfbodyX Well-Known Member

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    On the metal one the gear butts to a machined flat inside the tail housing and runs flush with the insert. No clip except the one one the inlet with the seal.

    DSC00083.JPG
     
    Last edited: Jun 21, 2019
  15. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Ah. Alright easy enough. Thanks
     
  16. volare 77

    volare 77 Well-Known Member

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    you want a long shaft gear 2538934 for 76 and earlier set up
     
  17. BudW

    BudW Moderator Staff Member

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    The short-shaft speedometer gears are for 4*4 pickups (including Jeeps) and for ('93ish) 2*4 pickups that have a speed sensor attached to the housing (electric speedometer).
    All 2*4’s (without speed sensors) pickups and vans made from ’66 to ‘92ish and cars made from ’66 to mid-year ’76 (with a few made the next couple of years later due to part availability problems) use the long-shaft gears.
    BudW
     
  18. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    Ah. Ok. Makes alot of sense. I bought a long shaft, so i should be set.
     
  19. Jnfbodyguy83

    Jnfbodyguy83 Well-Known Member

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    do you line it up with the hold down or as close to the gear as possible?
     
  20. volare 77

    volare 77 Well-Known Member

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    Should be a dot or small triangle at the 6 o`clock position on the trans. Line the dash between the numbers on the housing with the dot on the trans.