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gc8 6 speed conversion how to guide

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Old 31 December 2013, 11:50 PM
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Classic STI Paddy
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Default gc8 6 speed conversion how to guide

any one know is there such a thing? what will fit what models and needs to be bought?
Thanks in advance
Old 01 January 2014, 02:55 AM
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Paulo P
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you need the clutch, flywheel, starter motor, gearbox, prop, rear diff, linkage, **** & cradle and make sure that the roll pins are still in place.

The clutch, flywheel & starter motor aren't necessarily needed because you can use 5 speed stuff but this is the full conversion. You can't use 6 speed flywheels and clutches with 5 speed boxes though without work to the bellhousing due to clearance
Old 01 January 2014, 09:48 AM
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There are loads of different versions of the 6 speed box so just try get one with all the bits as it starts to get a bit of a headache if you buy separate as the rear diff needs to match the box and so on
There a're loads of threads on fitting a six speed in classic so read them and do your homework on it

I bought a dccd box long time ago with rear diff but had to convert the front of the box with stub axles for my classic drive shafts and then had to get a matching ratio diff to match and buy the time I had 6 speed shaft and linkage it cost me more than I could have bought the whole set up
Old 01 January 2014, 10:43 AM
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Easiest and cheapest way:

UK non-DCCD box, with its linkage, gearknob and prop
6 Speed cradle and mount
UK 3.54 R160 diff

You therefore keep your 5 speed clutch, flywheel and starter. You also keep your driveshafts and brakes.

Should be able to get a set up like that for about £1300.
Old 04 January 2014, 07:26 PM
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Thanks for your help lads, if you find a link cataluna 172 would you put it up please, not being lazy... cant find a definitive guide.. any one know how the early mechanical speedo would connect to 6 speed electric box?
Thanks lads.
Eric
Old 04 January 2014, 10:14 PM
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Paulo P
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you just unscrew the digital speedo sensor and screw in the mechanical drive
Old 05 January 2014, 03:30 PM
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nice one paulo, thanks
Eric.
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