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Transmission Spline Pattern in 88-91 EF's ??

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Old 10-05-2002, 06:16 AM
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Default Transmission Spline Pattern in 88-91 EF's ??

Quick tekkie question:

Can you list the spline pattern of the EF trannies for EX & Si in the 88-91 years?

Trying to figure out differences as we have a mismatch.
Can EX and Si trannies of the same year come with different spline counts?

I thought that 88-89 had fewer and 90-91 more, but is it possible that both spline patterns used in 90-91?
Old 10-05-2002, 07:34 AM
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Default Re: Transmission Spline Pattern in 88-91 EF's ?? (Ruby Civic)

89-91 are the same, 88 is different. Only difference between 89 and the 90-91 is the clutch disk had a smaller diameter in 89, but spline count was the same.
Old 10-05-2002, 07:06 PM
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Default Re: Transmission Spline Pattern in 88-91 EF's ?? (Jared)

88 has 21 splines on the input shaft, 89-91 has 20
Old 10-05-2002, 11:08 PM
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Default Re: Transmission Spline Pattern in 88-91 EF's ?? (Jared)

Seems to me the Pressure plate differs from 90-91 and 89. Parts store gave us a 91 Clutch and PP, tried to install it into an 89 CRX Si and the PP wouldnt line up with the pegs.
Old 10-06-2002, 08:28 AM
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Default Re: Transmission Spline Pattern in 88-91 EF's ?? (Slurp56)

hmmm what were they up to in st mary's ohio (site of the american honda factory)???
Old 05-29-2014, 08:48 AM
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Default Re: Transmission Spline Pattern in 88-91 EF's ??

I'm pulling an 88 with a ZC swap clutch out now. I will post pics in a bit...
Old 05-29-2014, 10:36 AM
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Default Re: Transmission Spline Pattern in 88-91 EF's ??

Jared has the correct info.
Old 05-30-2014, 03:48 AM
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Default Re: Transmission Spline Pattern in 88-91 EF's ??

Cool.. Saves me from having to upload pictures.
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