What's involved in fitting a 5 speed DCCD box into a GC8 WRX?
#1
What's involved in fitting a 5 speed DCCD box into a GC8 WRX?
I've found a rebuilt one at a decent price with an R180 plated diff. Problem is the box has a 3.9 diff in it and the R180 is a 4.44. So firstly, where can I find a 3.9 CWP for an R180?
Secondly, what do I need to fit this lot to my car? The box, the rear diff, a DCCD controller, a toggle wheel, is there anything else? DCCD clocks I guess, although not sure how they wire in with an aftermarket controller.
Also, I'm tempted because of the price, but it is a track/hillclimb car (and I'd like to transition it into a Gymkhana car) so am I on a hiding to nothing fitting the 5 speed and better off just waiting til I can buy a six speed?
Secondly, what do I need to fit this lot to my car? The box, the rear diff, a DCCD controller, a toggle wheel, is there anything else? DCCD clocks I guess, although not sure how they wire in with an aftermarket controller.
Also, I'm tempted because of the price, but it is a track/hillclimb car (and I'd like to transition it into a Gymkhana car) so am I on a hiding to nothing fitting the 5 speed and better off just waiting til I can buy a six speed?
#2
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That must be an early DCCD gearbox from 95-96? http://www.gearhack.com/myink/ViewPa...ission%20Chart
You can find 3.9 R180 diffs in Newage JDM STI's but they don't seem to come up for sale that often.
I think you can run it without the DCCD clocks and use an aftermarket controller but I'm not sure about that.
You should remember that the 6 speed is about 30 kg heavier so depending on your power level you could just as well use the 5 speed and not adding 30 kg extra in the wrong end of the car. The 5 speeds (at least the JDM 5 speed DCCD boxes) feel nicer to shift than the 6 speeds.
I have fitted a 6 speed Spec C gearbox in mine but I'd rather have kept the 5 speed but at 400+ bhp it wouldn't have lasted long.
You can find 3.9 R180 diffs in Newage JDM STI's but they don't seem to come up for sale that often.
I think you can run it without the DCCD clocks and use an aftermarket controller but I'm not sure about that.
You should remember that the 6 speed is about 30 kg heavier so depending on your power level you could just as well use the 5 speed and not adding 30 kg extra in the wrong end of the car. The 5 speeds (at least the JDM 5 speed DCCD boxes) feel nicer to shift than the 6 speeds.
I have fitted a 6 speed Spec C gearbox in mine but I'd rather have kept the 5 speed but at 400+ bhp it wouldn't have lasted long.
Last edited by Turbovin; 17 February 2019 at 11:42 PM.
#6
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I don't know about that but it can't be that hard to find a nice condition 5 speed later DCCD gearbox in the UK surely? That would be the easiest solution if you already have a good R180. I have the original 55000 km one in my garage but I'm keeping it in case I decide to go back to stock one day.
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#8
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A bit strange selling them as an unmatched set. Be aware that many R180 are worn in the clutch pack assembly and don't lock the way they should. Both my original 4.44 R180 and the 3.9 R180 I got with the 6 speed had a low preload so I had to rebuild them. But I think there are Suretrac R180's in 3.9 as well.
#10
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STI used to sell a kit with different ramp angles so it could be that or a different aftermarket clutch pack assembly. Or just an OEM diff rebuilt to proper preload.
Here's a thread on rebuilding the rear diff https://forums.nasioc.com/forums/sho....php?t=2726130
Here's a thread on rebuilding the rear diff https://forums.nasioc.com/forums/sho....php?t=2726130
#11
Didn't really want the extra expense but I have seen an R180 3.9 Suretrac diff. Say I got this to match the gearbox, provided it's a 1:1 drop gear obviously, I could always ell the 4.44 diff. But if I get this setup, can I still use my WRX hubs and driveshafts I do I need some newage STI hubs and driveshafts?
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talbotsteve
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03 October 2005 07:32 PM