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Thread: P5 5th gear swap

  1. #31
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    can just the 5th gear from the V6 tranny be put in a stock P5?

  2. #32
    long time mazda owner d0sitmatr's Avatar

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    yes, it can, but not sure if you want to go with that much of a jump in the gearing, especially if you need to downshift for any reason.

  3. #33
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    understood, tho it might be the easy route. Guess the better option is a good low-miles V6 tranny, esp if your P5 one is pooped. We need to pin down whether the shaft needs modded.

    Also it begs the question of using a V6 clutch: can you and how would that compare?

  4. #34
    long time mazda owner d0sitmatr's Avatar

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    if your using the V6 trans, then you def need to use the clutch for it.
    as for a comparison, it feels the same (to me, at least) using stock clutches on both.

    Im actually thinking of pulling the trans from my MX6, since its in need of being pulled and the clutch rebuilt. then seeing if it will bolt straight on and what sort of modifications might be necessary, if any. the only problem I can see is my MX6 is a 93, so not sure if that would make problems or not.
    if I do pull it and it bolts up, then I'll do a write up while I go. but it wont be any time soon, that much is sure
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  5. #35
    AFCed Since 8/25/07 Alejo_NIN's Avatar

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    guys, the tranny from the v6 (KL Engine) won't bolt up to the 2.0 (FS engine)
    cars that use the same bellhousing are:
    93-97 ford probe 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-97 mx-6 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-2002 mazda 626 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    2001-2003 mazda protege 2.0l

    also, it is still possible to mess up the 626 tranny as my car has gone through 4 of those and 2 protege trannies two of them with LSDs.
    so no, i don't agree when people say that the 626 tranny is stronger...it just has different gear rations making 5th gear a tad longer than the stock protege tranny.

  6. #36
    Registered Member GraySurf's Avatar

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    Quote Originally Posted by Alejo_NIN View Post
    guys, the tranny from the v6 (KL Engine) won't bolt up to the 2.0 (FS engine)
    cars that use the same bellhousing are:
    93-97 ford probe 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-97 mx-6 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-2002 mazda 626 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    2001-2003 mazda protege 2.0l

    also, it is still possible to mess up the 626 tranny as my car has gone through 4 of those and 2 protege trannies two of them with LSDs.
    so no, i don't agree when people say that the 626 tranny is stronger...it just has different gear rations making 5th gear a tad longer than the stock protege tranny.
    But will the 5th gear from the kl fit inside of our trans?

  7. #37
    AFCed Since 8/25/07 Alejo_NIN's Avatar

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    i dont know,
    don't think so.
    both trannies are different
    you need to stay on the 2.0l engine
    the v6 is different
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  8. #38
    long time mazda owner d0sitmatr's Avatar

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    Alejo, people on the probe forums are swapping the V6 trans to the 2.0L engine after its been boosted.
    how much modification is involved, I cannot say.

    their isnt a lot different between the 2 engines except 2 extra cylinders.
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  9. #39
    AFCed Since 8/25/07 Alejo_NIN's Avatar

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    r they really?
    hmm, i stand semi-corrected as it is isn't a bolt on part.
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  10. #40
    Passionate for the Road MazKid's Avatar


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    If I remember correctly, 5th gear from a '88-'92 MX-6/626 non-turbo/'89-'92 Probe GL is a 0.700 gear. You'll need both gears under the 5th gear cover on the trans. I did the swap to my '94 Protege and will be doing it to my KL P5. My brother did the swap to his '88 MX-6 GT. It should work in any G-series transmission. The Festiva 5th gear is even taller but requires trimming of the case.

    I swapped mine just by removing the splash shield and the 5th gear cover. You need a 27mm and 32mm socket or wrench for each shaft. You also need a punch to get a pin to release the gears/synchros. It's been FOREVER since I've raided junkyards for these gears but I've pulled a bunch of them. My '94 Protege's stock 5th is a 0.814 gear. Quite a nice difference!

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  11. #41
    Registered Member GraySurf's Avatar

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    Quote Originally Posted by MazKid View Post
    If I remember correctly, 5th gear from a '88-'92 MX-6/626 non-turbo/'89-'92 Probe GL is a 0.700 gear. You'll need both gears under the 5th gear cover on the trans. I did the swap to my '94 Protege and will be doing it to my KL P5. My brother did the swap to his '88 MX-6 GT. It should work in any G-series transmission. The Festiva 5th gear is even taller but requires trimming of the case.

    I swapped mine just by removing the splash shield and the 5th gear cover. You need a 27mm and 32mm socket or wrench for each shaft. You also need a punch to get a pin to release the gears/synchros. It's been FOREVER since I've raided junkyards for these gears but I've pulled a bunch of them. My '94 Protege's stock 5th is a 0.814 gear. Quite a nice difference!
    Good to know. I will have to start shopping around.

  12. #42
    long time mazda owner d0sitmatr's Avatar

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    Quote Originally Posted by GraySurf View Post
    Good to know. I will have to start shopping around.
    I agree. good to know
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  13. #43
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    According to an online reference, the stock protege 5th is a .755....so a .700 wouldnt be as huge of a difference.
    Im going to try and find the diesel 5th gear, which is .680

  14. #44
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    Wow this is some good info im prob going to start looking around
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  15. #45
    Registered Member hat1018's Avatar

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    Quote Originally Posted by Alejo_NIN View Post
    guys, the tranny from the v6 (KL Engine) won't bolt up to the 2.0 (FS engine)
    cars that use the same bellhousing are:
    93-97 ford probe 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-97 mx-6 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    93-2002 mazda 626 2.0l (won't accept the MSP LSD Differential wihtout modifications)
    2001-2003 mazda protege 2.0l

    also, it is still possible to mess up the 626 tranny as my car has gone through 4 of those and 2 protege trannies two of them with LSDs.
    so no, i don't agree when people say that the 626 tranny is stronger...it just has different gear rations making 5th gear a tad longer than the stock protege tranny.
    So any of these 2.0 trannies will bolt right up? Are all of the gears taller or just fifth?

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