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N63 Transmission, TC, and Diff Fluid change
I have a 2012 X5 50i that's close to 100K miles and has never had the transmission, transfer case, and differential fluids changed. I've searched for some DIY's but all of them seem to be for the 35d or 35i models. I know the diesel used the 6HP transmission and the 35i has the 8HP, but is it the same version of 8HP (mechanically) as the one in the 50i? Are there any substantial differences in parts or labor between these? A local indy that specializes in BMWs quoted me $400 for TC fluid change and adaption and close to $1000 for transmission fluid change. He also said diff fluid changes are not necessary... So I'm thinking I could DIY this. |
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#2
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#3
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$1000 for the trans?!!? Thats more than BMW dealer pricing!
parts: thectsc.com good DIYs here and on bimmerfest. (oops) Pretty easy DIY, dont be initimdated. Last edited by ard; 04-24-2019 at 01:46 AM. |
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The car started developing a slight shudder on mild throttle in full lock turns. No errors or warning lights (haven't scanned it though). There seems to be some disagreement in the community over whether that means the tc needs to be replaced or whether a fluid change can save it. I am keeping my fingers crossed that in my case it'll be the latter. I'll take the car in for the service next Wednesday and report back with the findings here. I know many others have posted about doing this but I think more data points will be useful. |
#5
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That kit does not include the correct ZF6 fluid. 1 hr labor?! Good luck. I see a cluster. |
#6
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Make sure they reset your adaptations in both your tranny and TC. Put them on the spot and ask if they know the re-learn procedure for the ZF8HP transmission. (its pretty easy, 25% throttle let transmission shift through all gears, then coast down through all gears, repeat min 6 times, then repeat in manual mode 6 times. You need a long stretch of road with little traffic to do right. It will relearn if you dont have that type of road but will take longer. |
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1 hour labor is a bit light though I agree but doable if they have done ZF8HP's before. |
#8
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what pump can you recommend? |
#9
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This is by far the best, you will be thanking me later. You can stuff all 5 pints in it and fill it in one sitting, no more going back and forth and spilling fluid everywhere. This is especially handy when doing the final fill procedure of being under the car while its running and filling that last pint before it spills out the fill hole....that is a nightmare with a hand-pump, the exhaust is right next to the fill hole...with this you can do it super fast and not get burned. it is worth every penny
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 also works great for your diffs and tc, just look for extra fittings for it on Amazon, they make a super tight one to reach the TC fill hole without having to take down the transmission cross brace |
#10
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Thanks very much for that tip!
I have used one that worked with the workshop's airpressure and that worked quite well but could only hold one litre so that's 6 -7 times refilling with all the slipperyness that comes with that. |
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