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Thread: Looking for differential feedback

  1. #1
    Join Date
    Sep 2020
    Location
    Birch Bay WA
    Posts
    6

    Looking for differential feedback

    Just purchased a 2004 330i zhp mt. The car has a 364 differential from an automatic, cold air intake with velocity stack, ss headers and peddle box. The car doesn't feel like what I was hoping for as a daily driver. Thinking of putting the 307 diff back in. Just wondering if you daily drivers are happy with the 307 diff? Thanks

  2. #2
    Join Date
    Jun 2012
    Location
    Socal
    Posts
    1,333
    I answered in your welcome thread. But what are you looking out of the car? Like what's wrong with it that you don't like?

    I think most people are fine with their stock diff. I have a 2.93 and it's fine for daily driving. Doesn't accelerate super fast, but I get great gas mileage. I plan to upgrade to a 3.38 later on. Increase acceleration a bit, but don't sacrifice too much on the top end. Plus with an SC, 3.64 would make my first couple of gears useless lol

  3. #3
    When I had my 3.07 in the ZHP it was nice and relaxed. I never got a chance to install my 3.64 in it, however, I DID install it in the wagon (325i) and it makes driving so much more fun. I wouldn't ever change back to 3.07 unless I was boosted and I needed the longer gears.

    Sent from my Pixel 2 XL using Tapatalk
    -Corey

    2003 Blue ZHP Sedan @ 210k
    Dead due to damaged valve. We will save her soul for future use, but the body will go to car heaven...or another owner...who may or may not turn her into a race car...

  4. #4
    Join Date
    Dec 2019
    Location
    Raleigh, NC
    Posts
    288
    I've used the 2.93 and 3.38 and I would always return to the 3.38 on a 6 speed. I thought it would be annoying on the Interstate but I barely notice a difference. It feels like a much better fit in pretty much every situation than the 2.93.
    330i Base | Mysticblau | Slicktop | 6MT

  5. #5
    Join Date
    Sep 2020
    Location
    Birch Bay WA
    Posts
    6
    Thanks for the feedback, coming from a 99 z3m roadster with the s52 5 speed. Looking for more of a daily driver with a mix of freeway and backroad cruising. The 3.64 seems really jumpy and torqey. Turned off the peddle box and that helps. Feels like they took a 5 speed and put six gears in it with 6th gear being like 5th. Think I've decided to put the 3.07 back in for now. See what that's like.

  6. #6
    Join Date
    Nov 2016
    Location
    Charlotte, NC
    Posts
    2,859
    I'm also like you and felt like even the 3.38 was too much. I definitely liked the torque, though. I settled on converting a 3.23 to work as my happy middle ground, but haven't tested it yet.

    You should definitely try a 3.07 since it's an easy swap (no need to mess with input shafts).

  7. #7
    Join Date
    Nov 2014
    Location
    Portland, OR
    Posts
    9,530
    Interesting...I've had a 3.38 on my list for whenever I get bored with my current setup. Don't make me have second thoughts.

  8. #8
    Join Date
    Dec 2019
    Location
    Raleigh, NC
    Posts
    288
    Quote Originally Posted by BMWCurves View Post
    Interesting...I've had a 3.38 on my list for whenever I get bored with my current setup. Don't make me have second thoughts.
    Don't listen to the talking Pizza, 3.38 is the way!
    330i Base | Mysticblau | Slicktop | 6MT

  9. #9
    Join Date
    Jan 2016
    Location
    Chicago area
    Posts
    1,838
    3.07 is good for a daily driver.

  10. #10
    Join Date
    Oct 2016
    Location
    Vermont
    Posts
    531
    I prefer 3.38 over 3.07 for the torque. The only drawback, for me, is that 1st gear redlines about 55mph. Also, I tested it with a 3.38 open diff, which was a definite (10%) improvement, but I really appreciate the 3.38 with limited slip.
    Last edited by Reasoned1; 09-30-2020 at 01:56 PM.
    2004 BMW 330i ZHP (52k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, Corsa TSE3 cat-back exhaust, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&W CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, black-out grilles, and WeatherTech mats

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