std hb 4spd to 5spd conversion
Junior Member
Joined: Jul 2004
Posts: 735
Likes: 0
From: Long Island,, NY, USA
Re: std hb 4spd to 5spd conversion (sherfield2002)
No trouble at all and all you need is a working 5spd DX or Si tranny.
If you don't know how to do it I highly recommend a professional installation. If you think you can pull it off it's not an extremely difficult installation but I'd put it at a 5-6 out of 10 on the difficulty scale. I also recommend replacing your clutch and replacing/resurfacing your flywheel while you're at it. You'll be very pleased if you do so.
Cars that some with the tranny you need:
88-91 CRX DX
88-91 CRX Si
88-91 Hatchback DX (*some are still 4 i think it was an option*)
89-91 Hatchback Si
88-91 Sedan DX/EX/LX (not sure which came with manual option)
Other models will fit as long as they're cable and for a D-Series engine. But watch out if you're going with different models. A Junkyard will have what you need.
Benefits of the Si tranny are obviously better acceleration, but the highway RPMs are higher than the DX transmission. I put the 5spd CRX DX transmission onto my 1988 STD and there was both performance and milage increases. I don't even know why honda bothered making that 4spd. The only benefit is city driving milage. And Americans do lots of highway driving so 5spd = best. I would crack down and try to find yourself an Si tranny, but a DX one works great as well.
I also am not sure about the axles if you go Si. Maybe someone else knows better. DX is direct swappage.
If you don't know how to do it I highly recommend a professional installation. If you think you can pull it off it's not an extremely difficult installation but I'd put it at a 5-6 out of 10 on the difficulty scale. I also recommend replacing your clutch and replacing/resurfacing your flywheel while you're at it. You'll be very pleased if you do so.
Cars that some with the tranny you need:
88-91 CRX DX
88-91 CRX Si
88-91 Hatchback DX (*some are still 4 i think it was an option*)
89-91 Hatchback Si
88-91 Sedan DX/EX/LX (not sure which came with manual option)
Other models will fit as long as they're cable and for a D-Series engine. But watch out if you're going with different models. A Junkyard will have what you need.
Benefits of the Si tranny are obviously better acceleration, but the highway RPMs are higher than the DX transmission. I put the 5spd CRX DX transmission onto my 1988 STD and there was both performance and milage increases. I don't even know why honda bothered making that 4spd. The only benefit is city driving milage. And Americans do lots of highway driving so 5spd = best. I would crack down and try to find yourself an Si tranny, but a DX one works great as well.
I also am not sure about the axles if you go Si. Maybe someone else knows better. DX is direct swappage.
Thread
Thread Starter
Forum
Replies
Last Post
Tuner Eddy
Honda CRX / EF Civic (1988 - 1991)
20
Jan 28, 2007 02:47 PM
Civic44
Road Racing / Autocross & Time Attack
8
Aug 10, 2006 01:25 PM
civicracer1993
Want to Buy
1
Aug 9, 2003 02:15 PM