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Quaife diff
#1578685
28/06/2016 14:33
28/06/2016 14:33
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CoupeCY
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CoupeCY
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Hi, I would like to know if the Quaife ATB limited slip differential with the code QDH2K will fit the Coupe turbo gearbox either the 5 or 6 speed. The other question I have, if it fits what do I do with the viscous drive. When I asked Quaife they said that it can work with the viscous. Thanks
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Re: Quaife diff
[Re: ]
#1578686
28/06/2016 14:45
28/06/2016 14:45
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nismo
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nismo
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yes it does as I have one fitted to my 20vt and bin the visco drive as you wont need it .
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Re: Quaife diff
[Re: ]
#1578698
28/06/2016 17:15
28/06/2016 17:15
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CoupeCY
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CoupeCY
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Then which one is for the turbo?
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Re: Quaife diff
[Re: ]
#1578699
28/06/2016 17:17
28/06/2016 17:17
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CoupeCY
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CoupeCY
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Did you fit it on a 5 or 6 speed? What have you done with viscous drive? How did you replace it?
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Re: Quaife diff
[Re: ]
#1578703
28/06/2016 18:43
28/06/2016 18:43
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nismo
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nismo
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its fitted to a 6 speed box and the visco is removed as its not needed with the quaiffe diff , you will need a different driveshaft seal for the drivers side shaft .
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Re: Quaife diff
[Re: ]
#1578708
28/06/2016 19:24
28/06/2016 19:24
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CoupeCY
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CoupeCY
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Can you please guide me? Do you keep the same shaft or use another one? Replace the seal with what seal? Thanks
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Re: Quaife diff
[Re: ]
#1578718
28/06/2016 20:07
28/06/2016 20:07
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nismo
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nismo
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Keep the coupe shaft but with the visco removed and ill have to check what diff seal we used but I think it was from a fiat bravo .
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Re: Quaife diff
[Re: ]
#1578771
29/06/2016 13:22
29/06/2016 13:22
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digitalundgrd
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digitalundgrd
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Hello, Maybe a dozen of people here know the answers of your questions. Although I have noticed that when somebody asks "What exactly is needed to bin the viscodrive and put the Quaife into the gearbox", nobody gives accurate answer!?! Maybe it is some kind of secret or know-how that they don't want to share... So let me get straight to the point : I am a pharmacist not a mechanic but I have some basic skills and I have "Quaifed" my coupe by myself and 10 000+ km later - no problems at all!! The whole thing is not complicated but you will need some tools and car lift (preferably). 1)Do you keep the same shaft or use another one? - YES, you keep the same shaft but you have to remove the viscodrive. 2)Replace the seal with what seal? - WHen you remove the viscodrive, you will see that if you use the original driveshaft((28mm diameter), you will need different seal cover (from jtd or alfa romeo V6 gearbox for example) + custom gearbox oil seal (28x50x10mm). Here I found something that could be helpful for you (with pictures) : http://www.totallyalfa.com/blog/index.cfm/2015/3/1/How-to-fit-a-Q2-or-Quaffe-Diff-to-your-V6-gearbox
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Re: Quaife diff
[Re: ]
#1578779
29/06/2016 14:38
29/06/2016 14:38
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Joined: Dec 2005
Posts: 8,425 Lightwater, Surrey
DaveG
Club Treasurer Member 311
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Club Treasurer Member 311
Je suis un Coupé
Joined: Dec 2005
Posts: 8,425
Lightwater, Surrey
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Sorry dw,I thought the answer was there already. According to Quaife catalogue, it's QDH6E
1996 Portofino 20vt & 2000 Pearl White Plus 2008 Ferrari F430 & 2017 Fiat 124 Spider
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Re: Quaife diff
[Re: ]
#1578787
29/06/2016 16:22
29/06/2016 16:22
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CoupeCY
Unregistered
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CoupeCY
Unregistered
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To: digitalundgrd Which Quaife diff did you use (QDH2K or QDH6E)? On which gearbox did you install it (5 or 6 speed)? Thanks
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Re: Quaife diff
[Re: ]
#1578794
29/06/2016 18:09
29/06/2016 18:09
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Joined: Oct 2010
Posts: 555 Bulgaria
Ferrarist
Enjoying the ride
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Enjoying the ride
Joined: Oct 2010
Posts: 555
Bulgaria
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1)Do you keep the same shaft or use another one? - YES, you keep the same shaft but you have to remove the viscodrive.
2)Replace the seal with what seal? - WHen you remove the viscodrive, you will see that if you use the original driveshaft((28mm diameter), you will need different seal cover (from jtd or alfa romeo V6 gearbox for example) + custom gearbox oil seal (28x50x10mm).
Did same and i can confirm it. I used Quaife that previously was fitted to 145's 1.9JTD.....it's same as 156's 2.5V6 and 166's 3.0V6....... Quaife number was QDH6E
Last edited by Ferrarist; 29/06/2016 18:11.
20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT
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Re: Quaife diff
[Re: ]
#1578846
30/06/2016 09:44
30/06/2016 09:44
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digitalundgrd
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digitalundgrd
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To: digitalundgrd Which Quaife diff did you use (QDH2K or QDH6E)? On which gearbox did you install it (5 or 6 speed)? Thanks QDH6E My coupe is 16VT with 5-speed gearbox. Also I didn't remove the whole gearbox. You must unbolt the front subframe and then just unbolt the rear differential casing and take the differential out. But 5 or 6 speed gearbox IMO there is no difference. The installation procedure is the same.
Last edited by digitalundgrd; 30/06/2016 09:44.
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Re: Quaife diff
[Re: ]
#1578856
30/06/2016 12:27
30/06/2016 12:27
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CoupeCY
Unregistered
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CoupeCY
Unregistered
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Ferrarist, The QDH6E is not listed for 145 1.9JTD, for this model is listed the QDH2K, as per Quaife catalogue.
The problem is, I have contacted Quaife and ask them a couple of things regarding the QDH2K and I have clearly mentioned to them that I was going to install it on a Fiat Coupe 20v turbo and they didn't tell me that it doesn't fit. They have only said that as far as they are aware this fits the 5 speed not the 6 speed, so I ordered it. Now some people are saying it fits and some are saying it doesn't. When I asked Quaife again they said that they haven't heard of any issues with this fitment. I believe that in the end the best solution for me is to give a try and see by my self. If it doesn't I will contact Quaife and try to return it and get the correct one. Thanks all of you for the feedback.
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Re: Quaife diff
[Re: ]
#1578873
30/06/2016 14:45
30/06/2016 14:45
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cheech
Unregistered
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cheech
Unregistered
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For 6 speed you need qdh6e that's what I can understand as quaife aren't sure . But gearbox company have measured and looked at diagrams and that's the diff which should fit .
Order from auto lusso lot cheaper and you order kit with seal and bearings . It's the custom oil seal auto lusso said you can buy it but no one knows what it is.
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Re: Quaife diff
[Re: ]
#1578910
30/06/2016 20:30
30/06/2016 20:30
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Joined: Dec 2005
Posts: 8,425 Lightwater, Surrey
DaveG
Club Treasurer Member 311
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Club Treasurer Member 311
Je suis un Coupé
Joined: Dec 2005
Posts: 8,425
Lightwater, Surrey
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QDH6E is what's fitted to my early 20vt with early 5 speed gearbox
1996 Portofino 20vt & 2000 Pearl White Plus 2008 Ferrari F430 & 2017 Fiat 124 Spider
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Re: Quaife diff
[Re: ]
#1578924
30/06/2016 22:44
30/06/2016 22:44
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Joined: Oct 2010
Posts: 555 Bulgaria
Ferrarist
Enjoying the ride
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Enjoying the ride
Joined: Oct 2010
Posts: 555
Bulgaria
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Ferrarist, The QDH6E is not listed for 145 1.9JTD, for this model is listed the QDH2K, as per Quaife catalogue. I don't know if it's listed or not, but i bought 2 very same P/N Quaife diff's from Autolusso UK, one was fitted to my 3.0V6, other one to my friends 145's 1.9JTD '99.....QDH6E. After year or so he abandon the car, i removed his Quaife and fitted it into my 20VT..... P.S - now i have 2 same Quaife diffs, one is on 5 speed early GB, other one on 6 speed GB from Alfa 166 3.0V6(same as 156's 2.5V6.....
Last edited by Ferrarist; 30/06/2016 22:47.
20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT
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Re: Quaife diff
[Re: ]
#1578927
30/06/2016 23:22
30/06/2016 23:22
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digitalundgrd
Unregistered
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digitalundgrd
Unregistered
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It's the custom oil seal auto lusso said you can buy it but no one knows what it is.
There is nothing special and magical about this oil seal. If you use oil seal from other fiat/alfa/lancia it would be with 29mm diameter and it will leak quite a lot! So the easiest thing you can do is to use the original drive shaft + jtd or v6 gearbox seal cover + custom oil seal (28x50x10mm) which costs 1 EURO!!!
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Re: Quaife diff
[Re: lost55]
#1578967
01/07/2016 12:31
01/07/2016 12:31
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digitalundgrd
Unregistered
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digitalundgrd
Unregistered
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I re-used the original shim. No strange sounds, no leaks, no broken gearbox IMO in 99% of cases the original shim can be re-used without problem. Still you can measure and check the preload for your own comfort
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Re: Quaife diff
[Re: lost55]
#1578980
01/07/2016 14:46
01/07/2016 14:46
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digitalundgrd
Unregistered
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digitalundgrd
Unregistered
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Here it is what the book says for 16vt gearbox :
Last edited by digitalundgrd; 01/07/2016 14:48.
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Re: Quaife diff
[Re: ]
#1578982
01/07/2016 15:17
01/07/2016 15:17
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cheech
Unregistered
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cheech
Unregistered
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I understand the custom seal is not special it's just a seal . I have the measurements and once it's all back together I will show what I used and where the parts came from .
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