01-08-2020, 08:21 PM | #1 |
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Manual Transmission Rebuild?
Hi everyone,
I have been experiencing an intermittent issue with my 6sp ever since new. 1st to 2nd gear grinds when shifting over 6500rpm. On a related note, this same phenomenon is only exacerbated by installing a clutch stop. I've posted about this before but basically if I run any level of clutch stop the grinding happens without fail. Naturally I removed it and for a while thought the issue was solved but I still occasionally get the grinding. Why this happens is beyond me and why others can run clutch stops without issue is also frustrating. Fast forward to a dealer visit about it. Unfortunately because it's not 100% repeatable they will not warrantee it. So it is what it is, I'm not terribly upset about it as it happens infrequently but do want to plan accordingly in the event I completely/eventually nuke 2nd gear. I know used transmissions are available for 15-2500 but would rather find someone to rebuild the trans I already have vs swapping in a used transmission with unknown history. That said, are these transmissions rebuildable? And can anyone recommend a shop that could handle it? I'm in SoCal but would ship the transmission to a specialist if need be. I would also love to chat with someone who has intimate expertise with these transmissions(if that exists) to see if they can make any recommendations about why my vehicle behaves like this. Thanks in advance |
01-08-2020, 09:39 PM | #2 |
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Go to a different dealer, they should be fixing it for free. When I had an issue with my eccentric shaft actuator that was not repeatable I was concerned that I wouldn't be taken seriously so I ended up taking a video of the issue. Once I showed them that I was taken care of. They opened a TSARA case and asked to keep the car for a few days and gave me a loaner. Had the car back fixed under warranty within a week.
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01-08-2020, 09:50 PM | #3 |
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I don't think another dealer would yield a different result. I am personal friends with my tech and very cool with the service writer. As of late BMW has been very aggressive about denying claims. Currently the car has a few aftermarket modifications and while everyone is in agreement they have no bearing on the issue in question they(the dealer) have been through the ringer trying to get BMW to pay out on other customer repairs involving far less with cars that had just intakes and exhausts. I'm not going to escalate this fight as the odds are currently against me and I don't want to risk getting the VIN flagged.
I do plan on returning everything to stock sometime within the next year before the warranty is up in the event this problem worsens. The purpose of this post is get any info about what my possible course of action could be outside of the sphere of warranty work. |
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01-08-2020, 10:59 PM | #4 | |
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01-09-2020, 10:30 AM | #6 |
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I ran the clutch stop for a week took it out after the 4th or 5th incident. I can't imagine that caused long term damage. More importantly, I'm trying to find a solution...
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01-30-2020, 08:12 PM | #7 |
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I've done a lot of reading on the forums about these clutch stops. There is a lot of anecdotal evidence that they may cause an issue. Can someone who has used one for many miles weigh in on if they actually are damaging?
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01-30-2020, 09:33 PM | #8 | |
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There are alot of people who say the clutch stop caused them issues and alot of people who say there are no issues. Until someone actually pulls the transmission open to check there are no guarantees.
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01-31-2020, 10:14 AM | #9 | |
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I had to eventually swap out to another used tranny. If your using a clutch stop make sure their is some room between where the clutch begins to engage and where the stop is set. I would err on the side of caution when you set it. I'm currently running a UCP which uses a stop. I've made sure its not set to close to initial pickup.
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01-31-2020, 11:54 AM | #10 |
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Can I just check that you're starting to shift up at 6,500rpm, rather than this being the rpm at which you engage the next gear?
Separately, what happens if you double de-clutch the upshifts (think Steve McQueen in Bulllit)? It sounds like the clutch isn't fully disengaging. |
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01-31-2020, 08:47 PM | #11 | |
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01-31-2020, 09:01 PM | #12 | |
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I had adjusted it too close to the initial contact with the flywheel. As long as your setting it up with a decent amount of room then there shouldn't be an issue.
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