3.15 gear, what models have them?

Discussion in 'Transmission & Drivetrain' started by onefastmf, Sep 19, 2019.

  1. onefastmf

    onefastmf Well-Known Member

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    Like the title says, want to swap from 3.55 to 3.15’s. I’m looking for the iron housing of course. I’ve seen mixed answers Just searching.
     
  2. Nagare

    Nagare Well-Known Member

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    Most base cars would have them. If you want it more or less guaranteed, look for a manual V6. Most of them were ordered with no options so it's rare to find any with the 3.55s.
     
  3. BmacIL

    BmacIL Enginerd

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    Auto cars without optional gears or performance pack. None are iron housings, if you're looking at full pumpkins. You'd have to swap the diff into an iron housing.
     
  4. Decosse

    Decosse Well-Known Member

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    If looking at the V6, avoid the 051A. To get the 3.55s, 051A was mandatory.
     
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    onefastmf

    onefastmf Well-Known Member

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    This is the kind of stuff that gets confusing, why are you saying that complete iron housings are not available?? The most common statement seems to be along the lines of what Nagare said, just trying to narrow down. Does anyone know if you can buy them complete? New from ford?? They have 3.55 complete setups posted everywhere I look but no 3.15
     
  6. BmacIL

    BmacIL Enginerd

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    Not with 3.15 gears, no.

    You can buy the diff that accepts 3.15 gears from Ford, and you can fit that diff with those gears into an iron housing. If you want to buy a fully loaded pumpkin that loads straight into the car and already has 3.15 gears, it's going to be aluminum.
     
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    onefastmf

    onefastmf Well-Known Member

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    What about the iron housing in the manual cars with 3.15’s? Can’t you just change the flange? That’s what seems like other guys are doing
     
  8. BmacIL

    BmacIL Enginerd

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    That doesn't exist from Ford. Manual cars only come with 3.31, 3.55 or 3.73.
     
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    onefastmf

    onefastmf Well-Known Member

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    Here is one that was posted in the for sale section, it’s sold, but it exists E160CEA7-496B-4120-8922-80A304BB56D3.png
     
  10. BmacIL

    BmacIL Enginerd

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    Ah yes forgot about the V6 manual. EB and GT manual has 3.31 as lowest numerical ratio.

    Either way you'll be looking for a while likely.
     
  11. Cobra Jet

    Cobra Jet Well-Known Member

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    Hit up LKQ, eBay or copart.com to see if you can find what you’re seeking... trying to find it here is unlikely due to the rarity.
     
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    onefastmf

    onefastmf Well-Known Member

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    Ya i got LKQ local hookup, just wanted to get a better idea of exactly what I'm looking for, gonna call my guy monday and see whats up. Does anyone have a part number of the flange I'm gonna need? of do i just swap mine?
     
  13. Nagare

    Nagare Well-Known Member

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    Better idea is to get on a 3.7 Facebook group (S550 V6 Mustangs) and offer to trade yours as a pumpkin swap, lots of guys would be happy to take your 3.55s and I'm sure there is a decent amount with manuals so they should have the iron housing and 3.15s.
     
  14. DANA44

    DANA44 Well-Known Member

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    I have a take off 3.15 from when I replaced it with a 3.55. Cast Iron 6M 2016 3.7 less than 30K miles.located in central Connecticut
     
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    onefastmf

    onefastmf Well-Known Member

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    Gonna check and see if I can get something local tomorrow, if not I’ll hit you up, are you cool with shipping?
     
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