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| 04-23-2015, 11:40 AM | #1 |
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Drives: '08 Z4 M Coupé // '09 X5 d
Join Date: Apr 2010
Location: Sioux Falls, South Dakota
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Denied 2nd gear at last track day.
First of all, I want to be clear that this is unrelated to the famous 1st-to-2nd denial at high RPM.
There was a turn where I needed to downshift to 2nd and half the time I just couldn't get it in. Same technique; always rev-matched. 2nd gear has always been notchy for me and it takes a good deal of experience to "feel" it, but that didn't even help me this time. Could this be related to transmission fluid and/or too hot gearbox? The fluid (Redline) was changed in May 2013 and this was my first track day since then. Friggin embarrassing in front of the turn official!
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'08 Z4 ///M Coupé (#1765/1815) — 1 of 68 Sepang Bronze / Black Nappa / Madeira Wood / 1 of 1 this combo
19" Advan RS / AP Racing / Bridgestone RE-11 / Autosolutions SSK / R.E. Diablo / R.E. trans mounts '09 X5 35d — Space Grey / Saddle Brown 20" Forgestar F14 / SCR Delete Last edited by RADRACR; 04-23-2015 at 11:46 AM.. |
| 04-23-2015, 12:28 PM | #3 |
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Captain
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Drives: '08 Z4 M Coupé // '09 X5 d
Join Date: Apr 2010
Location: Sioux Falls, South Dakota
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I'll add that it started to happen toward the end of the day, and it's never happened since (off track).
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'08 Z4 ///M Coupé (#1765/1815) — 1 of 68 Sepang Bronze / Black Nappa / Madeira Wood / 1 of 1 this combo
19" Advan RS / AP Racing / Bridgestone RE-11 / Autosolutions SSK / R.E. Diablo / R.E. trans mounts '09 X5 35d — Space Grey / Saddle Brown 20" Forgestar F14 / SCR Delete |
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| 04-23-2015, 12:38 PM | #4 |
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Lieutenant General
 
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There are many posts on this topic.
I had this happen regularly at one particular track at the same corner. short story - upgrade tranny mounts - RP synchromax in the tranny - upgrade the engine mounts - & for me the AutoSolution shifter also helped I dont even think about this issue anymore, it never happens now unless its driver induced 
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'18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold) |
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| 04-23-2015, 12:44 PM | #5 |
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Captain
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Drives: '08 Z4 M Coupé // '09 X5 d
Join Date: Apr 2010
Location: Sioux Falls, South Dakota
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I already have the trans mounts and AutoSolutions SSK. Will look into the engine mounts and synchromax. Thanks!
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'08 Z4 ///M Coupé (#1765/1815) — 1 of 68 Sepang Bronze / Black Nappa / Madeira Wood / 1 of 1 this combo
19" Advan RS / AP Racing / Bridgestone RE-11 / Autosolutions SSK / R.E. Diablo / R.E. trans mounts '09 X5 35d — Space Grey / Saddle Brown 20" Forgestar F14 / SCR Delete |
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| 04-23-2015, 09:07 PM | #6 |
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I've had this happen too at the end of the day when the transmission was hot. I've upgraded the engine mounts since and will see if there's any change at the next track day....
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| 04-24-2015, 04:11 AM | #7 |
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Down Under!!
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i replaced engine mounts and tranny mounts in one days, and it was like driving a complete diff car. AND my mounts didn't show any need to replace, but it sure was time to do so..
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2007 EuroSpec Z4///MC - Building/Developing Z4 GT3
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