Shifter Grind...
 

Has anyone else had this happen? To copy my video description: "Not sure what's going on here. It's not the gears themselves grinding. The sound comes from the shifter itself - like right there, and it "feels" like it's coming from that area too. Almost sounds like the reverse lockout is getting in the way or something. The faster I shift from 3rd to 4th, the more it makes that plastic-y grind noise before it allows me to go into gear."

I ordered a new shift knob and reverse lockout from Raceseng, so I'm waiting for those to arrive before I take anything apart. The sound and feedback are coming from right around the shifter. It used to do it only in 4th, but now I get it downshifting into 5th too. It's like something in the shift assembly is loose, and getting looser? I dunno...

[ame="https://www.youtube.com/watch?v=qkoswloec2w"]Shifter Grind - YouTube[/ame]

I donno ...... does sound like something is lose.

Hopefully it will be apparent when you open it up to put on your new parts.

humfrz ...... not being any help .....:(

Sorry, I couldn't resist :P

https://cdn.meme.am/cache/instances/...4/56045064.jpg

Are you absolutely sure it's not a worn syncro? You know we've had this discussion.

I don't think so. I mean it could be, but it is a plastic-y sound that sounds like it's coming from the shifter itself. Not the usual grinding noise and sensation you get when you fuck up a shift, lol, which is very distinct and sounds and feels like it's coming from the transmission itself (like you get a vibration in the shifter, but you can feel it coming from the transmission. This vibration feels like it originates right there in the shifter.) Also this has been happening for a while now and steadily getting worse. So unless my synchro was already bad at 20,000 miles, I don't think that's it...? I dunno tho. I mean, it could be anything. That's why I'm looking for feedback!

I need to get a better video. This one was rushed. I can get much better audio of the sound and you'll see what I mean.

:slap: ........that's for making the picture so damn BIG!

:D


humfrz

Well, ok!

...but srsly, what does it feel like when you shift gently? Is there a difference in how it behaves upshifting versus downshifting?

I need to play with it more - one of the things I plan on doing now that I'm out of Chicago and in NJ for vacation. I have time, and more importantly, some open back roads to mess around on without bothering a million people.

Offhand, though, from what I can recall, it happens in either direction for 4th, and I *think* only when downshifting to 5th. I'll hopefully have more info and maybe a better video in another day or two.

Right on. Well, you know I'll be here. I fear the worst, though. (._. )

Your pessimism will be the death of me. I will update with more info and video ASAP; just wanted to get some initial feedback.

LMAO

It's my special gift.

Welp, ....... no more from me ...... :rolleyes:


humfrz

Well the problem is obvious to me. You are shifting with your left hand!

I totally disagree that there is an actual tranny issue involved there. Like said in the opening post the noise is coming from the shifter itself not the tranny. It sounds more like the mech is sliding across a gate.

The linkage is ridiculously simple. The only way it could be simpler is if the gearshift lever stuck right into the trans. The lockout cable might be rattling inside the tube but something has to vibrate the shift lever to make that happen.

Simple things fail as easily as complex ones. They just do it ... well... simpler. That sound is not coming from the tranny (it is not near scary enough) and that just leaves the shifter and linkage.

Hmmmmmm... I hear a bit of grind the second time he shifts but let's go with your theory so Stang doesn't get too depressed. I don't want his suicide on my conscience.

I promise there us no actual grind in that clip, and never has been despite this issue every time I shift to 4th for the past 10,000 miles. I'm only bringing it up now because it's getting worse and it feels like whatever is loose might wind up completely cock-blocking me from 4th gear entirely.

That is the problem with trying to diagnose by remote control. Different computer setups may give us different results. At least it isn't "what is this smell?"

Well, now that I listen to the video again ...... the cause of the sound in the shifter, is clearly a rod bearing in the engine about to permanently seize up and spin.

The bearing catches when the load on the engine is changed due to shifting the transmission and the sound is transmitted through the transmission to the shift knob. Yep, left hand shifting will set the engine up to spin a rod bearing every time ...... :(

Ask Santa for a new engine.


humfrz

The only external device that limits movement of the shift linkage is the reverse lockout. The 3-4 gate is right in the center and that centering mechanism, including the springs, is all inside the transmission.

Does it feel like anything is either binding, or loose?

Does it help to angle the lever slightly left or right of center before pulling back into fourth gear?

Update: Ultramaroon is a ****. Probably. I went out today specifically to play around with it - something I have never actually done. And I made a very important discovery. If I pull up on the reverse lockout collar, that eliminates that rattle! So that's definitely where the sound is coming from.

Unfortunately, the reason I say Ultramaroon is a **** is because when I do that, I no longer get that loud, plastic rattle sound... which was masking a grinding noise from the gearbox... Blah.

I guess it's time to make use of my warranty. I guess a new transmission wouldn't be a bad thing - though I hate any time my car is touched for any reason. Will upload a video shortly.

[ame]http://www.youtube.com/watch?v=sFmvVpWbiGA[/ame]

[ame="https://www.youtube.com/watch?v=VS6GK-iBq94#t=33"]The Big Bang Theory - Sheldon loves Taylor Swift S08E13 [1080p] - YouTube[/ame]

Currently tooling around town in a brand new 2017 Crosstrek...
...because the BRZ is getting a new transmission under warranty after the mechanic at the dealership took it for a quick test drive this morning.

So yay... but I'm worried with all this talk of 4th gear synchro issues that the same problem won't happen again at 80k when I'm no longer under warranty, lol.

Loads of us driving around well over that with no issue. Just the luck of the draw with that first one. Not sure why but there seems to be a huge variation in the quality of these trannys. Some seem to have all sorts of issues and others not a single thing. The variance is way more than I would try to attribute to driving style. Don't see many 15s with issues though so you will probably be fine the second time around.

I think the key is in not shifting aggressively. A few people have gotten past the 100K mark without issue. I bet the silent majority who don't participate in forum and track day shenanigans rarely have problems.

I think you'll be fine if you break the habit of skipping gates. That's the silent killer.

I'm just gonna weld 3rd gear and use that for everything.

seems legit

I had a '59 Peugeot with a 4 spd column shift.

3rd to 4th was the same motion as 1 to 2.

There ya go @Tcoat ........the problem today is too damn many gears!

Three forward gears is enough for a MT; two gears for an AT.

That worked just fine for years .......... :iono:


humfrz

I'm not sure whether to scream illegal mods or laugh as you get even slower...