trans swap 90 civic hb 4 to 5 speed
Thread Starter
Joined: Oct 2004
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From: MPLS, MN, usa
trans swap 90 civic hb 4 to 5 speed
We have a 90 honda civic hb 1.5L that currently has a bad 4 speed. We would like to repalce it with a 5 speed. Will any (other than SI) 88-91 5 speed fit? What will I need to to the interchange?
Thanks.
-jg
Thanks.
-jg
Former Moderator
Joined: Oct 2001
Posts: 16,612
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From: Southside ATL, GA
Re: trans swap 90 civic hb 4 to 5 speed (inetj)
You will want a 90-91 Civic Si tranny, or if you cannot find the Si then get a DX.
They both have the same gears, but the DX has a taller final drive, which makes it accelerate slower because it takes longer to get through the gears.
Both will bolt in the same.
They both have the same gears, but the DX has a taller final drive, which makes it accelerate slower because it takes longer to get through the gears.
Both will bolt in the same.
Honda-Tech Member
Joined: Dec 2001
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From: Huntington Beach, CA, USA
Re: trans swap 90 civic hb 4 to 5 speed (B18C5-EH2)
http://www.gamesbbs.com/~dmoore/tranny.htm
if you are willing to get a new clutch/flywheel, you can widen your tranny options to any year, 88-91
if you are willing to get a new clutch/flywheel, you can widen your tranny options to any year, 88-91
Thread Starter
Joined: Oct 2004
Posts: 8
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From: MPLS, MN, usa
Re: trans swap 90 civic hb 4 to 5 speed (carsaregood)
Thanks guys. Very good info. I think we are going to get the 91 trans. Not sure what it was out of (DX vs SI) but as long as it works we will be happy.
Thanks,
-jg
Thanks,
-jg
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Former Moderator
Joined: Oct 2001
Posts: 16,612
Likes: 55
From: Southside ATL, GA
Re: trans swap 90 civic hb 4 to 5 speed (carsaregood)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carsaregood »</TD></TR><TR><TD CLASS="quote">http://www.gamesbbs.com/~dmoore/tranny.htm
if you are willing to get a new clutch/flywheel, you can widen your tranny options to any year, 88-91 </TD></TR></TABLE>
Actually you can keep the bigger 90-91 spec flywheel and big clutch set-up if you run an 88 spec tranny.
How?
I run an 88-spec mainshaft ZC with a 1986 Prelude Si clutch disc and the 90-91 Civic Si pressure plate and flywheel.
The 1986 Prelude disc has the same shaft size as the 88-spec trannies, but has the surface diameter of the 90-91 Civic discs.
if you are willing to get a new clutch/flywheel, you can widen your tranny options to any year, 88-91
</TD></TR></TABLE>Actually you can keep the bigger 90-91 spec flywheel and big clutch set-up if you run an 88 spec tranny.
How?
I run an 88-spec mainshaft ZC with a 1986 Prelude Si clutch disc and the 90-91 Civic Si pressure plate and flywheel.
The 1986 Prelude disc has the same shaft size as the 88-spec trannies, but has the surface diameter of the 90-91 Civic discs.
Honda-Tech Member
Joined: Dec 2001
Posts: 803
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From: Huntington Beach, CA, USA
Re: trans swap 90 civic hb 4 to 5 speed (B18C5-EH2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 »</TD></TR><TR><TD CLASS="quote">
The 1986 Prelude disc has the same shaft size as the 88-spec trannies, but has the surface diameter of the 90-91 Civic discs.
</TD></TR></TABLE>
oooo, great info, thanks!
The 1986 Prelude disc has the same shaft size as the 88-spec trannies, but has the surface diameter of the 90-91 Civic discs.
</TD></TR></TABLE>oooo, great info, thanks!
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