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HF 5th gear in a SI case (88-91) Q's

Discussion in 'Civic and CRX - EF' started by 78civic, Jun 21, 2010.

  1. 78civic

    78civic Junior Member

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    Good morning.. NO time to search yet.
    Has anyone done this swap? Links would be appreciated too.
    I'd like to get best of both worlds without spending tons of $.

    I already found out that this HF crx that I have, has a si trans and would like to pop it in my 4dr and since it would be out.. I could get the gears from Honda and swap them in if it's not a big deal. or have to pull the cases apart.

    I remember this swap back in the 80's with the 84-87's or the HF civ 5th in the 86-87 teg case also.

    I mostly drive 18mi hwy (@70-75mph leagal) to work and don't want to kill my mpg.

    Thanks. E
     
  2. jlicrx

    jlicrx Senior Member

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    not a big deal to swap the 5th gears, however, you do need to take the transmission apart - it isn't like the 1g CRX, 3g Civic or 1g Integra which had 5th in a separate little case on the back

    in addition to the HF .694 5th, you can also use the 5th from the 92-95 Civics which all except the Si models have a .702 5th - the Si models are .750
     
    Last edited: Jun 23, 2010
  3. 78civic

    78civic Junior Member

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    I've been soo busy that I actually forgot about this thread..
    Thanks again for your help sir. (gettin repp'd)

    I'll try and keep your info, I'll be swapping engines in a 78 1200 trunk model (D16a1)using a 85-87 si harness probably later this fall or winter..

    Errol
     
  4. 78civic

    78civic Junior Member

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    It won't let me rep ya..?
    It states that "i must first spread some reputation around before giving to you"..???

    E
     
  5. 78civic

    78civic Junior Member

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    Me again. You state- "5th gear(S)" so there is a main and countershaft set that needs to be changed or is it just one gear?
    Thanks again.
    E
     
  6. jlicrx

    jlicrx Senior Member

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    yes, gears on both mainshaft and countershaft need to be changed
     
  7. 78civic

    78civic Junior Member

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    Are they the same from 88-91's? (i'm on hold as i type with you..)
    He states that they only show a si and dx NOT the Hf..?

    Could you come up with the right part #'s??
    I'd really love the help.
    Thank you. Errol
     
  8. 78civic

    78civic Junior Member

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    ...1988 CRX hf
    Countershaft 5th: 23461-pl3-010
    Mainshaft 5th: 23581-pl3-000

    Does this sound good to ya?

    E
     
  9. jlicrx

    jlicrx Senior Member

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    i show both 23581-PL3-000 and 23581-PL3-010 for mainshaft - i think the 010 supersedes the 000
     
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