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03-13-2013, 11:19 AM | #45 |
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Some longer term use feedback here on the MT-90. I would use it again. I can't say that it's noticably better than OEM but it definitely isn't worse in my tranny. I've got at least 3K miles on the fluid now and have used it well down below freezing temperatures. My overall summary on the Z4M transmission is that it just doesn't like being shifted below 2500 RPM, particularly when cold. The revs on this engine drop so fast that if you try and shift at 3K without holding the revs with the throttle you're trying to put it into gear at 2K.
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03-13-2013, 11:32 AM | #46 |
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I ordered Amsoil 75w90 MTF for my tranny. Still sourcing Castrol SAF-XJ. Looks like Nissan GTR and Mercedes AMG use the same fluid. BMW seem to only sell Castrol SAF-XJ + FM which is much more $$$.
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03-13-2013, 11:35 AM | #47 |
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^ i thought you could get SAF-XJ from the dealer if you brought in a jug & they filled from their bulk barrel.
IIRC thats what Ron Stygar & others have done.
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03-13-2013, 12:21 PM | #48 |
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All cars after a certain year are supposed to use SAF XJ + FM. The initial SIB didn't mention the Z4 specifically, but they amended it later.
AFAIK the kind with booster only comes individually and is expensive. Had to buy two sets of fluids: one for new gears, one for 1200 mile break in. Ouch.
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03-13-2013, 12:44 PM | #49 |
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03-13-2013, 12:46 PM | #50 | |
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03-13-2013, 01:43 PM | #51 | |
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Note: Vehicles that have had the differential oil converted to this special oil should continue to use this oil whenever a service requiring the differential oil replacement is indicated.
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03-13-2013, 03:09 PM | #52 | |
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03-13-2013, 03:30 PM | #53 |
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Running Redline all around:
Crankcase 10w60 Gearbox: D4 ATF LSD: 75W140 GL5 SI-1 injector cleaner with Shell 93 v-power Smoother than stock now.
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03-13-2013, 06:39 PM | #54 | |
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Was just pointing out that it came with +FM and for some reason BMW says to keep using FM. Weather it's so the noise doesn't come back, or if there's a material property I don't know. But you know me, I always try to get the best for my Z
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03-13-2013, 07:54 PM | #55 | |
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03-13-2013, 11:42 PM | #56 | |
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Lots of good group buys this year, the bay area people are going to represent. All we need is an Airbox now
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04-18-2013, 10:13 PM | #58 |
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How important is it that the diff and tranny drain bolt hex keys be short/stubby? I've got some Craftsman ones to fit my torque wrenches but they weren't listed as stubby in their item descriptions, per se. Is it really tight to get a tool in there on either the diff or tranny? I ask so I can have the correct tools handy before getting into this too deep. Always sucks to have to clean up to go to the hardware store at the outset of a job. Thanks guys!
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04-18-2013, 10:52 PM | #59 | |
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