|
|
01-27-2009, 11:40 AM | #1 |
First Lieutenant
28
Rep 311
Posts |
1st to 2nd grind at high rpm
Folks,
Hopefully someone who understands modern manual gearboxes can help me out. Very rarely I'll get a fairly severe grinding trying to shift into second (I don't complete the shift into second when this happens). This has only happened when shifting at higher rpm's when in first gear, above 5k. Each time I've had the clutch all the way in (but am not double clutching). It has never happened from lower RPM first to second gear changes, and never happened between any other gear pairs. I'm not very worried; it's very rare (only twice in 8k+ miles). However, if anyone has any ideas about how/why it happens, that would be great. I've driven manuals for about ten years now, and have attended multiple AutoX's in my prior car. So I don't believe I'm doing something wrong, but open to suggestions |
01-27-2009, 12:12 PM | #3 | |
///M Fan
366
Rep 2,159
Posts
Drives: '09 E92 M3 IB/'17 f85 X5M LBB
Join Date: Sep 2008
Location: Canton, GA.
|
Quote:
__________________
'09 E92 ///M3 Interlagos Blue,6MT,Silver Novillo Leather,CF Trim,Premium Package,Technology Package,Cold Weather Package,Premium Sound,19"Wheels,Moonroof-Toy/'17 X5M, Long Beach Blue, Executive Package,Technology Package, Lighting Package, Driver Assist, Full Mughello Red Interior, 21" wheels-Toy/'14 535i with M Sport and 19" wheels-Daily
|
|
Appreciate
0
|
01-27-2009, 12:20 PM | #4 |
Colonel
253
Rep 2,091
Posts |
Happens to me once in a while when I am shifting close to redline. I think it is because I am trying to shift too fast. Either that or because the throw is a bit on the long side. I never experienced this problem on my e46 M3 or my 997 (that gearbox is a dream comapred to BMW units). I too have been driving manual now for over 10 yrs.
__________________
2012 Audi R8 V10TT| 6MT| Suzuka Grey
2015 Ferrari 458 Speciale| Rosso Scuderia 2020 BMW X7| Mineral White 2024 718 GT4 RS | Arctic Grey |
Appreciate
0
|
01-27-2009, 12:21 PM | #5 |
First Lieutenant
28
Rep 311
Posts |
Hmmm. Each time the grind occurred, the clutch pedal was on the floor, but it's true that I don't have a clear memory of what happened before. So, maybe first gear came out without the clutch fully engaged, and the clutch was finishing engagement as I tried to put it into second. Definitely going to be very deliberate in the future to ensure that is not the case.
|
Appreciate
0
|
01-27-2009, 07:13 PM | #6 |
do a wheelie!!!
154
Rep 929
Posts
Drives: E46 M3 - '72 2002 - '65 Impala
Join Date: Oct 2008
Location: Los Angeles
|
It's happened to me a couple times. I dodn't wanna say anything because I thought you guys would call it inexperience But I just take about .5 seconds longer on my 1st-2nd gear shifts and no more grind
__________________
~Adam
|
Appreciate
0
|
01-28-2009, 04:06 AM | #8 |
Major
72
Rep 1,172
Posts |
Thank God I have a DCT so I don't worry about these issues!! DCT FTW!!!
I thought I'd just let this off my chest as a DCT owner! All these DCT threads whereby 6MT guys jump in with constructive comments such as "oh, I am glad I got a 6MT", or "DCT is rubish", or "6MT FTW" etc? Well payback time for DCT owners!!! Okay, flame suit on now... |
Appreciate
0
|
01-28-2009, 05:09 AM | #9 |
Private First Class
13
Rep 109
Posts |
Revs + low gear = high centifugal force
slamming the gearstick into second at 8000rpm in 1st means that the little magic bits in your box are spinning faster than at any time in any other gear. It has less to do with the power of the engine and more to do with the high revs. Try this simple fix. Insert clutch. Say "one mississippi" Change gear and release clutch. Lose .01 of second on your race between the robots and make it home without tearing your gearbox in half.
__________________
8000 RPM, what a feeling!
|
Appreciate
0
|
01-28-2009, 06:58 AM | #10 | |
Major General
152
Rep 5,124
Posts |
Quote:
|
|
Appreciate
0
|
01-28-2009, 09:16 AM | #11 |
Moderator
94
Rep 1,920
Posts |
+1
As an asside....in my GT3, I had a third gear synchro going bad. I had an extended warranty on the car, so I went through them. Instead of just replacing the synchro, they gave me a new factory tranny flown in from Germany! That phucker was nearly 12K. lol. I couldn't believe they did that, but was a happy camper! Thank God for the extended warranty! lol
__________________
Tim <--- apparently likes "3" cars
2014 E63S -- The Rocket 2014 F30 328i -- Kids car 2008 E90 M3 -- Sold 2004 GT3 -- Sold 1997 M3/4 -- Sold 1995 M3 -- Sold |
Appreciate
0
|
01-28-2009, 10:10 AM | #12 |
Lieutenant
24
Rep 404
Posts |
Hmmm...I've done that twice in around 10,000 Kms as well. Both times I assumed I was just being over-zealous and trying to switch faster than those slow-poke DCT boys!
Now you got me thinking! |
Appreciate
0
|
01-28-2009, 10:10 AM | #13 |
Driver
17
Rep 505
Posts |
1st to 2nd for me sucks. Sometimes, its smooth and sometimes it feels like it grinds, no matter what rpms.... Blah.... Rubbish!
__________________
** Go Navy! **Go SF 49ers!!!** Go SF Giants!!! Go Warriors!!!!!**
|
Appreciate
0
|
01-28-2009, 11:01 AM | #14 |
Lieutenant Colonel
369
Rep 1,887
Posts
Drives: '20 M5C, '09 M3 DCT Coupe
Join Date: Apr 2008
Location: Eastern Oregon... They call 'em rigs here
|
My previous 2 BMW's did this, M coupe and 330i ZHP. Just had to make sure my 1st to 2nd shifts were a little slower and more deliberate than the rest of the shifts. Never heard of any solutions... It just wasn't possible to shift 1st to 2nd as fast as the rest of the shifts.
BTW, gr8000, I thought exactly the same thing, since I have had to put up with that same "glad I got 6MT" BS line from some idiot every time someone complained about some perceived problem, sometimes not even related to DCT. So, just for the record, I'm glad I got DCT. Paybacks. Maybe someday the 6MT and DCT tribes can get along, maybe. |
Appreciate
0
|
01-28-2009, 01:50 PM | #15 |
Enlisted Member
5
Rep 44
Posts |
the car doesnt like to go into 2nd unless the clutch is all the way down. Whenever I try to "rip" the 1-2 shift it usually misses. You have to be nice with it. Short shifter helps somewhat but the car just doesnt like to be rushed in 2nd.
|
Appreciate
0
|
01-28-2009, 02:03 PM | #16 | |
///M Fan
366
Rep 2,159
Posts
Drives: '09 E92 M3 IB/'17 f85 X5M LBB
Join Date: Sep 2008
Location: Canton, GA.
|
Quote:
__________________
'09 E92 ///M3 Interlagos Blue,6MT,Silver Novillo Leather,CF Trim,Premium Package,Technology Package,Cold Weather Package,Premium Sound,19"Wheels,Moonroof-Toy/'17 X5M, Long Beach Blue, Executive Package,Technology Package, Lighting Package, Driver Assist, Full Mughello Red Interior, 21" wheels-Toy/'14 535i with M Sport and 19" wheels-Daily
|
|
Appreciate
0
|
01-28-2009, 02:11 PM | #17 |
Racying Dynamics
118
Rep 4,391
Posts |
Yep, happens to me also but I blame it on maybe letting the clutch out a tad too soon. I´ve either gotten better and shifting or the gear box has settled. Still happens every once in a while though.
__________________
==================================================
|
Appreciate
0
|
01-28-2009, 03:10 PM | #18 |
First Lieutenant
28
Rep 311
Posts |
thanks
Thanks everyone for your replies. My car was delivered with a few more miles than usual. That's always in the back of my mind, so it's good to hear that others have had similar experiences. Sounds like I should just be a bit more patient on that shift.
Now if my service department would just put in the right amount of oil on an oil change, life would be grand. Ahhh, personal thread jacking. |
Appreciate
0
|
01-28-2009, 03:11 PM | #19 |
First Lieutenant
28
Rep 311
Posts |
|
Appreciate
0
|
01-28-2009, 04:15 PM | #20 |
Colonel
154
Rep 2,736
Posts |
same 1st ---> 2nd grind with me!
I thought I was the only one and I didnt wanna post it and someone tell me to 'search' for it lol It happens around 7500+ RPMs and its only when I shift really fast and hard. Scared the hell out of me lol its happened twice to me so far
__________________
‘23 RRS First Edition
'22 X7 M50i '18 R8 V10+ http://www.bimmerpost.com/forums/attachment.php?attachmentid=133578&d=1204654487[/IMG] |
Appreciate
0
|
01-28-2009, 04:20 PM | #21 | |
First Lieutenant
28
Rep 311
Posts |
Quote:
|
|
Appreciate
0
|
01-28-2009, 04:23 PM | #22 | |
First Lieutenant
12
Rep 306
Posts |
Quote:
What you can do is wait longer for it to warm up, and shift with 1/2sec between the gears. I've had this happen a 10min after oil and coolant were up to temp. I've owned 2 other manuals and have driven many, including at 1/4 mi tracks without any sort of grind. If it happens constantly even after it's well warmed up, I'd have them look at the clutch. They actually replaced mine and it was functioning PERFECTLY except for this and sometimes not letting me get out of gear smoothly. See when you try to pull it out of a gear with the clutch fully in (warmed up of course) if you feel abnormal resistance.
__________________
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|