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BANG! Shifter popped out of 2nd during acceleration...
I had a 2.8L coupe for 4 years, never happened. I've had my S54 for 1 year, and this is the third time that it has happened. I think that it could happen every day and it would still scare the living crap out of me every time.
Open stretch of road, applied a little more throttle than typical in-town driving. I was in 2nd at about 40'ish MPH and I heard the bang, stick immediately went to neutral. Got off the gas quick enough to avoid the rev limiter.
I know that others have experienced this. Is there any consensus as to why it happens? It seems that it's only happened under harder acceleration on moderately rough surfaces.
John
| | Reply » BANG! Shifter popped out of 2nd during acceleration... |
Join the club. It's happened to me at least twice, maybe three times. I can't remember off the top of my head...
Have been meaning to respond to your PM, will do it in a few minutes here...
| | Reply » BANG! Shifter popped out of 2nd during acceleration... |
Does it sound like you just ran over a cinder block?
Happened to me once, put it into 2nd, hit the gas heard the loutest bang ever. scared the **** out of me (not the sound, but the fact that something bad happened to my baby)
| | Reply » BANG! Shifter popped out of 2nd during acceleration... |
This happened to me a few times early on, always when the transmission was not warmed up. The last time was at HC 2003. Hasn't happened since, and I drive it harder now than I did back then. Suspension is much stiffer than it was stock, and Michigan roads aren't kind, so I don't think it has anything to do with rough surfaces. When it happened at Homecoming 2003, it was on a smooth surface (turning into the entrance to the plant). Same goes for the time before that.
Right before HC 2003 was when I installed Ron's carrier arm and Randy's shifter, I think this may have something to do with it, the stock shifter was very vague in comparison. With the stock shifter and carrier arm bushings, I think there were times I thought it was fully engaged when it really wasn't. Nowadays there's no question whether it's in or out of gear, and I can definitely feel a difference between hot and cold transmission. When warmed up it shifts smoothly and fairly effortlessly. When cold it's more effort and takes a little longer to shift.
Which shifter are you using? Stock carrier arm bushings or Ron's setup?
| | Reply » BANG! Shifter popped out of 2nd during acceleration... |
Quote: | Which shifter are you using? Stock carrier arm bushings or Ron's setup? | Shifter is completely stock. Even got the BMW "lifetime" tranny fluid (which I've been meaning to replace with Redline). When it happened today, I had only been driving the car for about 5 minutes, but the other two times, I think that it was fully warmed up. The 2nd time it happened, I don't remember where it was, but I do for the first time. I was making an uphill right over some slightly bumpy pavement, gave it a little gas and then almost wet myself when it popped.
John
| | Reply » BANG! Shifter popped out of 2nd during acceleration... |
Quote: Shifter is completely stock. Even got the BMW "lifetime" tranny fluid (which I've been meaning to replace with Redline). When it happened today, I had only been driving the car for about 5 minutes, but the other two times, I think that it was fully warmed up. The 2nd time it happened, I don't remember where it was, but I do for the first time. I was making an uphill right over some slightly bumpy pavement, gave it a little gas and then almost wet myself when it popped.
John | No scientific study to back this up, but I'm inclined to believe that the stock shifter and carrier arm bushing was misleading me on engagement. Could just be coincidence, or something else entirely, but...
Ron/Randy's shifter and Ron's carrier arm and bushing setup is worth doing regardless of whether or not it helps prevent popping out of gear. My stock shifter rubber was overly soft, and actually not potted very well (loose fit). The stock rubber bushing in the front of the carrier arm is a wear item and I suspect it doesn't last terribly long (if I had kept mine, I'm pretty sure it'd be begging for replacement by now). It annoyed me that I could rotate my stock shifter with thumb and forefinger, and it moved back and forth quite a bit when in gear. The carrier arm moved fore and aft a little bit when going through the gears sitting in the garage, and my front carrier arm bushing was still fairly new when I replaced the carrier arm with one from Ron. I now suspect this was part of my popping out of 2nd problem; carrier arm fore/aft movement and stop being mistaken for full engagement.. It can't move fore and aft with Ron's bushings, nor can it rotate along its axis except in sync with the transmission (torque-over). The stock rubber bushing is a vibration-dampening thing, it's not needed to handle torque-over (that's handled by the way the carrier arm mounts in the rear; a cone into a rubber bushing).
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BANG! Shifter popped out of 2nd during acceleration...