10-11-2022, 07:25 AM | #1 |
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Transmission Oil Change Interval when Camper Towing?
according to the manual the transmission oil change interval is 100k miles. Anyone change their oil more frequently when towing? Time or mile based?
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10-11-2022, 06:07 PM | #2 |
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I would call your service department, if I recall correctly, the ZHP 8 speed is a closed system and they don't recommend doing the fluid change at all. I few people will do it right before their warranty up, figuring if it goes, it will go then while it is under warranty, but whenever I asked for a transmission flush, I was always told it wasn't recommended.
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10-18-2022, 11:32 AM | #3 |
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I just got my '23 45e and I tow max 5,000 lbs camper and I do plan on changing the transmission fluid around 30k miles or a year before warranty expires.
Over time the oil will degrade due to heat cycles and can create build-ups Car manufactures refer as "Lifetime oil" as expected life time of vehicle & transmission (100k miles / 10 years) I can't find the video, but I remember watching the ZF OEM Transmission Manufacturer disagreeing with lifetime oil but BMW and other car manufactures usually say lifetime. What's the worst can happen? transmission fails outside the warranty and you either replace the transmission or buy a new car |
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10-19-2022, 06:51 PM | #4 |
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My mechanic offered to change it right before the warranty was up, he said in his experience it will fail soon after the change or not at all so if you don’t mind paying for the expensive transmission oil, go for it. 👍🏼
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10-22-2022, 02:03 PM | #5 |
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Seems to be confusion between flushing or just the filter, clean magnets and top off. Never flush one. The equipment is usually contaminated. If you see brown fluid the transmission needs a rebuild. Its best to do your own filter because one bit of debris in there will likely kill it. This is why there is no dip stick.
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11-16-2022, 10:55 AM | #7 |
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^ is drop and refill not flushing
from my understanding the flushing can be bad as it can clog channels if there are any impurities in the oil (especially higher mileage) I think the key is to ask for drop and refill service and not flushing |
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11-19-2022, 12:01 PM | #8 | |
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I would say 50k miles is a good time to change. Don’t flush. |
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11-28-2022, 08:08 PM | #9 | |
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11-29-2022, 10:05 PM | #10 | |
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11-30-2022, 06:44 PM | #11 | ||
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11-30-2022, 08:30 PM | #12 |
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12-31-2022, 07:02 AM | #13 | |
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I think your issues is the word flush. You do not flush transmission, you drain and refill. And while some fluid will remain in the torque converter, you are adding sufficient new fluid to add renew protection. This is why you do it sooner when you are heavily using the car and adding high heat to the transmission fluid. Heat is the number one killer of transmission due to fluid deteriorating, taking away its ability to cool and maintain good viscosity in the box. ZF used to recommend an interval of 49K miles to 62K miles (Coversions from KM). So the fluid is NOT a forever fluid and the transmission is NOT sealed. There is even a published procedure for this and BMW has done all of ZF my fluid changes. My ZF in the F30 has been drained and refilled at every 60K, I am due for a third fluid change here soon since I am approaching 180K miles. |
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