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whats the best 5 speed cable trans to put in a 91 hatch

Discussion in 'Civic and CRX - EF' started by tim lyons, Jan 22, 2015.

  1. tim lyons

    tim lyons New Member

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    Hello im new to the site. Im restoring a 1991 honda 4 speed 1.5 hatch with mpg in mind. Im going to be swapping the trans for a 5 speed. Can someone please tell me the best 5 speed cable trans I should look for. I see different ratios, splines and lsd. Im mostly interested in mpg. Also would A head swap be worth while? Any info greatly appreciated. Thanks
     
  2. jlicrx

    jlicrx Senior Member

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    your best bet is probably the transmission from an 89-91 (not 88) CRX DX or Civic DX/LX - you could also use the 89-91 CRX HF which has really long gear ratios, however, it would most likely not help your mpg
     
  3. tim lyons

    tim lyons New Member

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    Thank you very much. I found a 1991 cable crx trans assy for sale. would that be a good choice?
     
  4. Briansol

    Briansol Admins Admin VIP

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    There were at least 2 models, dx and si. possibly hf that year as well (not sure?) each with different set ups. do you know which one?
     
  5. jlicrx

    jlicrx Senior Member

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    yes, there was an HF model CRX in 91

    it will work, however, if it is the Si model it will be geared very low which will increase the rpm when driving resulting in a drop in gas mileage
     
  6. tim lyons

    tim lyons New Member

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    Uggg thats a problem because thats why I want to swap for a five speed. My rpm presently is high going 65 mph. Is there any where I can find out a trans model # so I dont end up making matters worse? Thanks
     
  7. Jeef

    Jeef NO MA'AM Moderator VIP

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    My 91 civic I think got a little better gas mileage with the si tranny over the dx. It was a little better or the same, 14 years ago so I don't remember. But the si tranny was a lot more fun to drive with.
     
  8. efhondakid

    efhondakid My name is Byron. VIP

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    If your after MPGs I would leave the 4 in it and drive it like your grandmother would. After all that's the way Honda had initially intended it to be driven. Remember as a general rule of thumb as HP and driving "fun" increases your MPGs decrease. :thumbsup:
     
  9. tim lyons

    tim lyons New Member

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    I understand that but at 65 I can tell my rpms are much higher than i would like.
     
  10. Briansol

    Briansol Admins Admin VIP

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    Have you considered going to a larger tire combo instead? you can effectively numerically increase your final drive ratio by utilizing a larger wheel/tire combo, like a 205/40/17 which is 3 or 4% taller than the oem 13"s
     
  11. tim lyons

    tim lyons New Member

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    I see the different models you have listed, If I was going to purchase a cable trans out of the 1989-1991 trans what model would you suggest i purchase that would work the best for what im looking for?
     
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