I mean i'm about to pick up either 3.15 LSD differential or 3.91 LSD differential for my 3 series, i just haven't decided which route to go with? I mean any suggestions & why should I go with which one? Because i mean my car has almost 100,000k miles on it & i believe it's time to change the differential & driveshaft so i need opinions please.
SINBIMMERS
if its a 5 speed, i wouldnt want to drive it on the highway with 3.91 gearing.
|H&R Sports|Bilstein Sports|3.15 LSD|URI Crank Pulley|M3 Exhaust|Slotted Front Rotors|Debaffled w/K&N|UUC Clutch Stop|CDV Delete|Depo Ellipsoids w/DDE|Crystal Clear Fogs|Clears all around|M3 Front Bumper|V2 Splitters|M3 Moldings|35% Tint|Stellar Keyless/Alarm|
The 3.15 will make your car accelerate like a Prius, and the 3.91 will make your car swallow gas like a hooker guzzles....well, you know. Get something else. 3.73 or a 3.6*
you should check into a 3.23 or a 3.38, although they will cost much more, hard to say
i got a 2.93 open and i promise it'll smoke a prius.Originally Posted by dougmoney
what are you sayingt that the 3.15 wouldnt help?
lol- interesting overstatement there... A prius- sheash.... Oh, I see- your in a 318, makes sence now. -sorry, just playing.
My 328's stock @ 178k (you didn't mean 1 mill miles did you?), my diff and drivshaft are doing fine- though it's time for a new guibo. Mileage alone can't really be used to determine when to replace stuff. -I know a guy with a 328 with 400k on it still on original driveshaft and diff- though the bearings where redone @ 250k on both.
I'd say get a 315 unless you're rarely on the hiway- or otherwise over 70mph... 315 will raise your rpm on hyway ~200rpms, you'll gain a bit of accel, and lose a bit of mileage. seams to me, it's more practical then others- I do alot of hyway driving though. -I'd even buy a 2.93 lsd if I could pick one up cheap- IMO the m52's got enough torque to remain respectable with stock gearing; and the rpm at hiway speed = your engines longitivty & fuel mileage.
ive got a 3.15 and i love it. Car still drives like it used to on the highway, but it definetly accelerates harder. For a little more punch, go with the 3.23
|H&R Sports|Bilstein Sports|3.15 LSD|URI Crank Pulley|M3 Exhaust|Slotted Front Rotors|Debaffled w/K&N|UUC Clutch Stop|CDV Delete|Depo Ellipsoids w/DDE|Crystal Clear Fogs|Clears all around|M3 Front Bumper|V2 Splitters|M3 Moldings|35% Tint|Stellar Keyless/Alarm|
Which cars had a 3.15 LSD? 325 I believe?
95 M3
e36 325s with winter package
|H&R Sports|Bilstein Sports|3.15 LSD|URI Crank Pulley|M3 Exhaust|Slotted Front Rotors|Debaffled w/K&N|UUC Clutch Stop|CDV Delete|Depo Ellipsoids w/DDE|Crystal Clear Fogs|Clears all around|M3 Front Bumper|V2 Splitters|M3 Moldings|35% Tint|Stellar Keyless/Alarm|
I love my 3.23 LSD - anything shorter would be death on the highway. Right now at 90 MPH I'm at 4K RPMs which I feel is tolerable, especially when you take into account the around-town acceleration.
Cruising around town wasn't too bad with the 3.91 and on the highway at 75-80 i was still getting 26mpg. Wasn't really all that bad and it pulled very hard through all the gears.
only before traction control rememberOriginally Posted by Spahrman5
--DrDubHold on let me get my laptop and read this on the toilet.
i vote for 3.15 unless you race a lot. i'm looking to get a 3.15 or 3.23, i don't really care but if i find a 3.23 for a good price then i'll go with it.
-Ivan
Kevin I read your for sale thread for your 3.91 and saw that you were looking for a 3.38. If the 3.91 wasnt that bad, why the switch to a lower ratio? Just got sick of the shortness of teh 3.91?
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