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High mileage 328i; dealer says not to change trans/diff oil.
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12-21-2019, 11:22 AM | #1 |
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High mileage 328i; dealer says not to change trans/diff oil.
I took the car in today to have that done. 270k with no record of a previous change. Mechanic at the dealer said if they changed the fluids with those miles, it'd cause it to fail. What should I do?
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12-21-2019, 12:37 PM | #3 |
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12-21-2019, 02:16 PM | #5 |
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Efthreeoh17303.00 CTinline-six6825.00 |
12-21-2019, 09:12 PM | #6 |
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Go to an independent BMW mechanic. That dealer is an idiot. No record of it doesn't mean the fluids haven't been changed (unless you know for sure...?). The manual trans and diffs in these cars are bullet proof. They need lube changes every 100,000. Get the juices changed.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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CTinline-six6825.00 |
12-25-2019, 06:40 PM | #7 |
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There’s no reason not to change them. I’m a transmission/axle engineer. But there also might not be any reason to change them. I’ve tested axles and transmissions that have gone through a entire “vehicle life” and had the oil analyzed and it was totally serviceable.
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12-28-2019, 05:07 PM | #8 |
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Change them. Pronto. This is cheapish easy maintenance that will save your transmissions/Differential for a lifetime.
I have an E90 328xi and the lifespan on the gear oil is about 100k KM. Easy to do, on stands, but much easier on a hoist. There is many a guide on youtube, and even to the uninitiated, it took me more time putting the car off the ground, than it took to do the job. I think in total it took me 1 hour. Have many rags handy. It's not super messy, but you will make a spilly. Remember to replace the drain/fill plugs with new ones from BMW as they have non-replaceable seals on them. Also get their gear oil while there (don't waste your time trying to find aftermarket gear oil/ MT fluid, as everyone has their own opinion). I believe BMW MT- LT3 is what youll need. Stuff 'n Things: BMW Manual Transmission Drain/Fill Plug - Genuine BMW 23117531356 https://www.fcpeuro.com/products/bmw...ug-23117531356 BMW 75W80 MTF-LT-3 Manual Transmission Fluid (1 Liter) - Genuine BMW 83222339221 https://www.fcpeuro.com/products/bmw...ml-83222339221 BMW Differential Drain/Fill Plug - OEM Supplier 33117525064 https://www.fcpeuro.com/products/bmw...ial-drain-plug Guides: Manual Transmission Fluid Change: Differential Fluid Change: You'll need the Allen Hex Socket set to remove the drain plugs, and a standard socket to remove the bottom rear plastic cover from the bottom of your car. Double check my part numbers, as I pulled them for the Xdrive model. Niteshade |
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12-28-2019, 08:15 PM | #10 |
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I disagree. Considering how cheap they are, and the fact that your cannot change only the seal, it is a great deal of peace of mind knowing the job was completed properly, and will not leak due to a faulty seal as a result of negligence.
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12-29-2019, 01:37 AM | #11 | |
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The trans and diff fill plugs have no fluid to hold back since the oil level sits at the bottom of the fill hole. Second, there is no internal pressure buildup in either component to force oil past the seal. Gravity will affect pressure on the trans drain plug, but the weight on the drain plug just a few pounds at worse and has to get past 15 thread turns before it reaches the seal. Replacing the plugs is overkill. If you really are worried about leaks, use some Teflon tape on the plug threads. But again, the plug style of which you speak of that has the green rubber seal ring do not leak due to age or number of times they are opened/closed. Last edited by Efthreeoh; 12-29-2019 at 02:08 AM.. |
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12-29-2019, 05:16 PM | #12 |
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1. Firstly, I have been working on cars for over 24 years (since I was 20). Don't make assumptions about my knowledge base or experience, as I have not made assumptions based upon yours.
2. There is a reason the manufacturers of nearly every vehicle state to replace the plugs and or gaskets on any drain bolt that is used (either for increased profit margins, or because they want to guarantee a no-leak repair - you pick). I think a bit of both is true. 3. You are willing to assume some risk, based upon your quoted experiences. 4. I am not willing to accept this risk as mentioned in #3 above. I like to guarantee that any drips in my driveway are not as a result of my negligence, but are in fact because of a problem on my 3 vehicles (which then get immediate attention). So far no drips is the best kind. 5. We do not know what level of risk, or thoroughness, the OP will assume. I am voicing my opinion, based upon my experience, as are you. Clearly they are looking for transmission/diff longevity. Doing the Fluid Re/Re correctly will accomplish this. 6. You disagree with my point, as I disagree with yours. No biggy. Let the OP make his decisions, as fortunately, we both have given him/her lots of viewpoints to think about. Thanks! Niteshade |
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12-29-2019, 08:43 PM | #13 | |
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12-29-2019, 11:42 PM | #14 |
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Good for you. I still would not accept that level of risk, for such a cheap, and easy to replace part.
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12-30-2019, 06:15 AM | #15 | |
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So yeah, good for me; pissing away $193 is stupid.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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01-14-2020, 08:13 PM | #19 |
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Manual transmissions are lubricated the same way a differential is, splash lubrication. Old fluid with metal particles from ages of wear is not exactly the best lubricant. Change both of them.
On automatic transmission some shithead mechanics will say changing the fluid on high mileage ones will cause them to fail and argue thick worn fluid helps keeps them engaging the worn clutches, this is obviously clueless. Most people dont know anything about how an automatic works. Never have I had a failed automatic because of that or at all. It's old folks tale. The fact that you made it to 270k is because you have a manual lol. Change the diff and tranny and you'll be good for more miles of fun. |
01-19-2020, 08:27 AM | #20 |
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What welding method did you use for the transmission? It might have been cheaper to just get new plugs.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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01-27-2020, 05:08 PM | #21 |
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Just serviced front and rear differentials in my car and good thing I did because the front was a bit low. Car is fine
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