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Sport Gearboxes!
Posted: Mon Jul 04, 2005 12:54 am
by Quaser
Couple of questions of sport gearboxes - firstly, what are the identifying numbers, and where are they located?
Secondly, what are the real advantages of a sport box over the standard box?
Q
Posted: Mon Jul 04, 2005 2:00 am
by ZiMMie
Getrag 260 its the strongest tranny ive ever driven on. its usuually found @ the right side of the tranny look @ it from the priciple end. 325i tranny that all u need.
Posted: Mon Jul 04, 2005 8:09 am
by Turbo-Brown
Think it's the bellhousing number on the right hand side.
If you wipe all the oily gunk off from under the output shaft, you'll find the gearbox number.
Can't remember what it's supposed to be for the sport box, did post it up a while ago though so a search should reveal it
Posted: Mon Jul 04, 2005 8:27 am
by Turbo-Brown
Ah Haa!
'ere we go: 260.0.1060.91 from under the output shaft
Posted: Mon Jul 04, 2005 9:44 am
by Quaser
Thanks M8
Posted: Mon Jul 04, 2005 11:32 am
by Karan
Turbo-Brown wrote:Ah Haa!
'ere we go: 260.0.1060.91 from under the output shaft
yep i have 2 sport boxes and can confirm that
Posted: Mon Jul 04, 2005 1:15 pm
by Demlotcrew
Well i think thats just the part number for the housing.
Im sure then only way to tell if its sport or not is by the gearbox number which is on a flat piece of the tip of the bell housing. And is unique to all gearboxes.
A
Posted: Mon Jul 04, 2005 1:33 pm
by Turbo-Brown
Anyhoo, advantages of a close ratio gearbox are that you can keep the engine closer to it's power band as each gear shift equates to less of an engine speed change.
Posted: Mon Jul 04, 2005 5:21 pm
by Simon13
it's only the ratios in 1st,2nd and 3rd that are different to a standard 325 box
Posted: Mon Jul 04, 2005 5:32 pm
by Zayyan
Is it not meant to remove the gap between 2nd and 3rd or something?
Posted: Mon Jul 04, 2005 5:34 pm
by Nelly
I thought it was only 2nd + 3rd that where different Si??
Posted: Mon Jul 04, 2005 5:38 pm
by Simon13
no i'm right! 1st 2nd 3rd!!
Posted: Mon Jul 04, 2005 6:35 pm
by M3Compact
325i...... 325i sports .......320i
1st-3.83...1st-3.35.......1st-3.72
2nd-2.20...2nd-2.03......2nd-2.02
3rd-1.40...3rd-1.36.......3rd-1.32
4th-1.00...4th-1.00.......4th-1.00
5th-0.81...5th-0.81.......5th-0.81
Posted: Mon Jul 04, 2005 10:06 pm
by Turbo-Brown
Guess it depends on the final drive ratio you use. My understanding is that the standard 325i has a 3.73:1 final drive ratio whereas the Sport has closer to 4:1 (3.93 or something?).
Anyhoo, I'm keeping the standard 325i final drive to give a Uber long first with the ratios nicely (I hope) stacked after that plus the benefit of quiet motorway cruising.
Posted: Mon Jul 04, 2005 10:13 pm
by Karan
surely u'll want an lsd though and finding a 3.73 lsd is a tall order
easier to find a 3.64 or a 3.91
Posted: Fri Jul 08, 2005 2:08 pm
by Turbo-Brown
Or make a 3.73:1 LSD.
Am planning at some point to make a kind of constant lock (i.e. simple) LSD using the crown wheel from a 3.73 diff (when it turns up)
Reckon some EN3 steel should be 'ard enough.
Got a mate who owns a precision engineering firm and he says if I design it, he can make it
Posted: Mon Jul 11, 2005 11:06 am
by Demlotcrew
I know who has a 3.7 lsd for sale and its good.
A
Posted: Mon Jul 11, 2005 2:03 pm
by Quaser
how much?
Q
Posted: Mon Jul 11, 2005 6:44 pm
by Simon13
now that would be telling but i saw it yesterday at brooklands 3.73 lsd!
think he wants Ԛ£350 for it