flippy
Member
Registered: 14th Apr 02
Location: east yorkshire
User status: Offline
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Hi there, anyone know if there is a differance between the cav and calibra f20 and the astra f20 boxes? if so any part numbers so i can tell the differance between the two.THANKS
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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Both gearboxes will be mechanically identical, im sure the mountings and mounting points will be different though.
Dave
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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i think the cav has a wr version where as the astra is cr.
may depend on the model, cav cdx is defo a wide ratio one.
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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But then again, wont the Calibra one be CR?
Dave
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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Yes, make sure that it is CR and not WR
Dave
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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yeah, make sure is CR or you will lose loads of speed.
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Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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I used to hate that problem on my old corsa, rev the nuts off it, change gear, only to be sitting at 1500rpm again 
Dave
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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there was a 5 door 2l corsa in total vaux a while back which had the wr box, it did 80 mph at something silly like 2000 rpm.
the engine isnt gonna pull from those revs kin 5th very well.
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flippy
Member
Registered: 14th Apr 02
Location: east yorkshire
User status: Offline
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ok so how do you tell? on the old boxes it used to say cr,wr but not so on the f20,pulls well in 4th then 5th is a wast of time,been told that boxes are differante short off finding one in the car how do we tell, struggeling so far?
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Kris TD
Member
Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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post on migweb.co.uk
people on there will know, that site is very good for this sort of stuff.
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corsas suck
Registered: 1st Jan 70
User status: Offline
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The best thing you can do is go to your local scrappy, get a 4-speed close ratio box from a 998 mini and bolt it onto the back of your food mixer... sorry imean vauxhall block... the smaller engine will have needed a shorter final drive as well so you can weld that on the rear of your skip... sorry i mean corsa... and call it rear wheel drive.. WINNER!!!!!!!!!!!!!
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d0gz_bollox
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Registered: 8th Apr 02
Location: Walsall
User status: Offline
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There all close ratio. just have different final ratios adding a few mph on top of each gear.
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stuyw
Member
Registered: 15th May 02
Location: North West Drives: Rev3 MR2 Turbo
User status: Offline
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ive got a F16 in mine as it gives better acceleration but slower top end, but thats not wot its all about 
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d0gz_bollox
Member
Registered: 8th Apr 02
Location: Walsall
User status: Offline
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They do an F16 in wide ratio as well.
4 speed boxes are usually good for acceleration
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