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#1
11-16-2010, 10:59 PM
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****4.8iS: 4.44 Front and Rear Diffs, Installed****
The increase in acceleration is intoxicating, and the drivability is as OEM factory. Overall, a must upgrade to anyone seeking a lil' more "humph" from an already fully modded X5. 
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#2
11-17-2010, 12:01 AM
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Cool, do you do some competitive racing?
Me, I don't want to lose anymore MPGs with that upgrade.  Or does it not affect your overall drive ratio?
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#4
11-17-2010, 09:41 PM
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Going from the stock 3.91's to the 4.44's should make for a decent change in pickup feel, but the speedometer and odometer will be left inaccurate and you will lose some top speed and MPG on the highway etc. But it's gotta make it damn fun to drive!
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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#5
11-17-2010, 11:17 PM
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Quote:
As far as daily driving, the X5 is great. I have all Dinan goodies installed (stage 3: tranny and engine sw; x-pipe; throttle body; intake; 4.44 frt/rr diffs) and I still avg 17mpg city/hwy.
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#7
11-17-2010, 11:22 PM
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Quote:
 A lot of fun for a DD, and really does not cause any major top end difference - however I'm finding myself stepping on the skinny right pedal a lot harder, lol. I'm an adrenaline junkie at heart 
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#8
11-17-2010, 11:22 PM
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A few questions if the info isn't classified:
What is involved in creating the gearsets? - Other BMW parts? - One-off's? How did he determine backlash? - What spec was used? - Shims needed? Transmission temps are kosher?
__________________
Previously owned: '03 4.6iS Dinan Supercharged
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#10
11-18-2010, 12:08 AM
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That's actually quite a good price!! I paid about 3k (parts only) for just the rear of my 7, went from a 2.82 one-legger to a 3.46 LSD. I considered doing the 3.64, but after watching some videos of the Area 51 M5's and having a J-Spec MR2 back in the day, I didn't want to have a completely useless 1st gear ever again. I'm still annoyed that diff changes cost this much on BMW's (I paid 1/2 this installed for the 4.56's on my F350), but welcome to the BMW world.
__________________
 650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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