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gearbox question

 
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baldy
Alfasud


Joined: 23 Jan 2006
Posts: 67

PostPosted: Thu Nov 01, 2007 12:14 pm    Post subject: gearbox question Reply with quote

Has anyone noticed on the gearbox external bell housing that there are various colours used by alfa ive seen green blue and white up to present, on differant gear boxes. im thinking it could be an indication of the ratios used does anybody know? as it would be a quick usefull guide.
Lee
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Alan
Alfasud


Joined: 15 Aug 2007
Posts: 48
Location: Slovenia - Ljubljana

PostPosted: Thu Nov 01, 2007 8:38 pm    Post subject: Reply with quote

I have 3 gearboxes in my garage right now. Where should that be exactly?
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baldy
Alfasud


Joined: 23 Jan 2006
Posts: 67

PostPosted: Thu Nov 01, 2007 11:29 pm    Post subject: Reply with quote

If your looking at the gearbox from the gear lever input shaft end ,its at the opposite side to the clutch lever opening at the top. Lee
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Ben_nz
Gold Cloverleaf


Joined: 30 Sep 2003
Posts: 575
Location: Auckland, New Zealand

PostPosted: Fri Nov 02, 2007 9:43 am    Post subject: Reply with quote

Here's another gearbox question.
At the rear end of the gearbox there's a long support arm attached, stretching toward the back of the car. The end of this arm has a hoop with a rubber bush, and a pin passes through this to mount the support arm to the car.
Should there be massive clearance around this mounting pin, or should the bush take up all the spare space in the support arm's hoop?
I just want to know whether mine is massively worn or whether it's designed that way. Wink
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john 33_16v
16 Valve


Joined: 27 May 2005
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Location: herts, uk

PostPosted: Fri Nov 02, 2007 10:02 am    Post subject: Reply with quote

Ben- Think they normally have quite alot of clearance.

Lee - If anyone knows the answer to colour thing it will probably be Ramesh Bharadia the boss of Alfarama 020 8951 4100. I know he himself is an alfa gearbox specialist, and i've heared that he used to do rebuilds on behalf of main dealers and alfa uk.

Would love to know the answer. Just bought a spare box myself!

John
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Alan
Alfasud


Joined: 15 Aug 2007
Posts: 48
Location: Slovenia - Ljubljana

PostPosted: Sun Nov 04, 2007 5:07 pm    Post subject: Reply with quote

I found this on one of the gearboxes i have.
It's blue color.


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Eddie_W
Alfasud


Joined: 08 Aug 2007
Posts: 74
Location: New Zealand

PostPosted: Wed Nov 07, 2007 10:03 am    Post subject: Reply with quote

Ben, when new those mounts have a hole you could drive a bus through. The engineering rational escapes me.
Regards Eddie
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bobbber
P4


Joined: 14 May 2003
Posts: 2162
Location: The Greatest Town on Earth - Swadlincote, UK

PostPosted: Wed Nov 07, 2007 10:09 am    Post subject: Reply with quote

Eddie_W wrote:
Ben, when new those mounts have a hole you could drive a bus through. The engineering rational escapes me.
Regards Eddie


Eddie, I agree. When I look at the design and then attempt to work out the purpose - I draw a blank.

Bob
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Alan
Alfasud


Joined: 15 Aug 2007
Posts: 48
Location: Slovenia - Ljubljana

PostPosted: Wed Nov 07, 2007 6:49 pm    Post subject: Reply with quote

@ ben

yes that rubber mounting has a rather big hole Very Happy
I solved that (when it was FWD offcourse) by making my own mount from a bigger tube and some flat piece of metal. (sorry i dont know all the right words in english) You can see the part on the picture (in the red eclipse)
It helped alot and gear shifting was more precision and the engine-gearbox movement was reduced.


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hugh jinjin
Alfasud


Joined: 04 Sep 2004
Posts: 68
Location: Glasgow

PostPosted: Thu Nov 08, 2007 12:38 pm    Post subject: Reply with quote

the bush in the end of the gearbox extension isn't really to hold the gearbox rigidly in place but more to transfer crash loads to the chassis to stop the footwells crushing in the event of a head on crash. The Sud was originally designed with a lightweight alloy gearbox extension but after crash testing of prototypes this was abandoned and the heavy duty steel one seen on all production suds and 33 was adopted.
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john 33_16v
16 Valve


Joined: 27 May 2005
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PostPosted: Thu Nov 08, 2007 1:16 pm    Post subject: Reply with quote

hugh jinjin wrote:
The Sud was originally designed with a lightweight alloy gearbox extension but after crash testing of prototypes this was abandoned and the heavy duty steel one seen on all production suds and 33 was adopted.


Hi,

I think my 1982 sud had an alloy extension- fairly sure.

My 1985 sprint had a steel one, along with 33 type axle, front brakes etc.

If anyone has the haynes sud manual to hand, there are pics of the underside.

John
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rsfruitbat
Alfa Sprint


Joined: 13 Jun 2007
Posts: 241
Location: Kidderminster

PostPosted: Thu Nov 08, 2007 2:37 pm    Post subject: Reply with quote

I think early Suds had the p***k in a shirt sleeve back mounting but the tailshaft was bolted straight onto the rear gearbox casing with no rubbery bit inbetween.
Changing to this I have found does improve the gear change quality. I also think the Sprint gearlever might be a bit shorter which reduces throw.

rsfruitbat Cool
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Admin
Site Admin


Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK

PostPosted: Sat Nov 10, 2007 2:40 pm    Post subject: Reply with quote

john 33_16v wrote:
I think my 1982 sud had an alloy extension- fairly sure.


As far as I know they didn't even make it into production, let alone through 10 years of production. The manuals show the allow extension (as does the Haynes which uses reproductions of the Alfa drawing in places I think), but they were produced before the car was 100% finished in development. The alloy extensions was too rigid for impact absorbtion from memory.

All the best

Keith
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ZeNiTh-PbArM
Alfa 33


Joined: 14 Mar 2003
Posts: 388
Location: Paris, France

PostPosted: Mon Nov 12, 2007 7:23 pm    Post subject: Reply with quote

Hi,

as far as i know the alloy extension was only fitted to italian cars.
export suds all featured the steel one

regards,
zp
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RBL
Alfa Sprint


Joined: 30 Mar 2003
Posts: 162
Location: Leicestershire

PostPosted: Fri Aug 01, 2008 4:33 pm    Post subject: Reply with quote

Lee

Did you ever work out exavtly what the blue mark indicates? I've also got a 5 speed 'box with the same marking.

Rich
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