35mm

Well, I doubt I'll do all of this, but I'd like to know. Besides sourcing a same-year Base 5-speed transmission, what else will I need to change in order to remove Honda's ATTS from my car?

Can anyone shed some light here?

Thanks!

vwong

I don't think you need to swap the entire tranny with a base Prelude tranny. From looking at the service manual, it seems like all you need to remove is the ATTS unit, and replace with an intermediate drive shaft from a base Prelude. Afterall, the ATTS unit is located outside of the tranny.

__________________
2009 BMW 335i Coupe, Alpine White/Black Dakota, 6MT
2010 Audi S4, Ibis White/Magma Red, 6MT

35mm

Now that you mention it, yeah. A big, clunky looking thing off to one side. But if the transmission case and bellhousing are cast differently for the ATTS module, then that could pose problems with trans side axle seals.

I dunno-- I need to buy that Helm manual. That is a good point, though, vwong

5g Prelude SH

darklude

you'll need to swap the tranny and the lower block cuz the block of an SH only fits the tranny of an SH (non-interchangable)

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01 Type SH
15.360@90.86mph at Cali Speedway
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Setups

DirtyLude

removing atts, and running standalone

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DirtyLude
Mark Higgins

Toronto Prelude Club
www.hondaprelude.to

35mm

Thanks, DL

vwong

Ouch....too much work, especially if you have to align the half shaft with a plate. After reading that post, my concern for this is that if the half shaft isn't aligned correctly, you'll ruin your drivetrain eventually. And how sturdy that plate would be to keep the half shaft in place? If it breaks, say bye bye to your drivetrain also. I'd rather just pull out the ATTS fuse.

__________________
2009 BMW 335i Coupe, Alpine White/Black Dakota, 6MT
2010 Audi S4, Ibis White/Magma Red, 6MT

99_SH

The base model has this hanger which holds the drive shaft. Is there a place for this in the SH? are all the holes already there?

35mm

I dunno. It would seem like that hanger would need an inner sleeve and bearing combination to do that (hold the axle).

As far as I know, the only external differences between the standard and ATTS manual trannys are slightly different castings for clearance and a different set of halfshafts.

You're probably looking at totally different mounting points on both the transmission casing/H22 block and underside of the car unibody. The ATTS unit is almost half the length of a Base axle.

You need a better gearhead than I at this point.