Elephant in the room
 

Greetings from England!! (Not New England btw ;) )

I've had my GT86 for around 3 weeks now and have got the infamous rattle through clutch and a little bit through steering when going over rough roads at around 5mph. Don't worry I've done a search on this forum (best 86/BR
Z/FRS forum I know of) and have found the below link and think this may be it :iono:

People in the UK seem to just put up with this issue but i'm definitely not going to! My dealer has diagnosed as Thrust bearing as a possibility and want to strip GB. I think this is :bs:as the GB seems fine to me and reckon the noise will still be there afterwards..Was just hoping someone else has had this issue and got it finally resolved. I know the Aussies believe it's something to do with the JTEKT EPS system not filtering out rattles when going over bumps??

Anyway here's the link - http://www.ft86club.com/forums/showthread.php?t=29405

Any feedback would be much appreciated :thumbsup:

Hello welcome.

There is a TSB over here for shifter rattle, you just drop it off at the dealer and they take care of it in a few hours and thats that. It is on here somewhere so maybe have your dealer try that first?

That only applies to the 13s and some very early 14s though so not sure it can be used on the later ones.

Oh, did not know that! Thanks for pointing that out!

TSBs are all only good up to the product change VINs. After that the production cars have whatever change was made already done so performing a TSB would be useless.

Thanks :)

Sorry guys I should of been more clear on that thread..although I do have the shifter ratte, my main concern is the cluncking and loose feeling through the clutch and steering over rough roads at low speeds, don't hear it when going above 30/40mph.

Ps my car is a late 12 with 26k on the clock.

Welcome to the family! I think what you are going to find is that there are a lot of great aspects to these cars but there also seems to be build quality issues.


That being said, I have an automatic and we have a lot of bumpy roads here but I have not noticed any steering issues going over them. I do notice that you feel every rock and pebble in the road compare to other cars I have driven.


Did you check your tire pressure? Maybe your tires are over inflated?? I run around 33-34 psi for the best feel.

Thanks man!

Yes those are the pressures I run but what i'm feeling is a rattle through the clutch pedal when engaged only going slowly and a little feeling through the steering. It's as if there is something loose like steering rack or gearbox and they're shaking when going over pot holes at low speeds. I have read that a lot of 86 owners in the UK have this but just live with it. It's going into my dealers in the new year but they think it's something to do with the thrust bearing but I highly doubt it..

Anyone with similar issue? :iono:

Bump lol

I have an automatic, but I assume the clutch is hydraulic in these cars, so there is no mechanical connection between the clutch pedal and the tranny. So even if the tranny were moving around the clutch pedal would not.


What you are feeling in the steering wheel might be just the mass of the wheel and column vibrating in the bushings.


In my opinion these cars have unnecessarily firm springs, so you feel every little bump or undulation in the pavement.

TOB checking time! Push dealer to just replace that sob!

Thanks for the replies guys!

So i presume you get this knocking feeling as well but it's just normal?? i've never felt this in any car before. It basically feels like something is going to drop off at low speed on a rough road..very disconcerting lol

It sounds like the OEM bushes are not doing a very good job then if the column moves around like that and can be felt through the pedal, i should say it's actually felt more through the pedal than anywhere else. So BRZ has stiffer spring rate in front, do they feel it more than us 86/FRS owners i wonder??

Sorry but what's TOB? :bonk:

Throw out bearing. Also called a release bearing. It's the bearing that pushes in the clutch fingers when you push down on your clutch pedal.

It's what you call a "thrust bearing".

Like @jcw99 says ...... it moves the fingers of the "pressure plate" part of the clutch system.


humfrz

I think the best thing would be to drive another car for comparison. It's impossible for us to know what and how much vibration you're feeling. Is there a dealer or a car lot around you that has a car you can drive? Even if you have to drive a different car there and pretend you're looking for a car it would be worth it.


BTW, would you say "look for a stockist with an example in their forecourt"? I love Queen's English. :)

No way!! :lol:

This is exactly what my dealer thinks the issue is!! Thanks for confirming what that meant. They said that when they got it on the ramp they could def hear it clunking. I said but how come i can't hear it when going quicker and they said you wouldn't over engine noise etc..They said they will try to do the work under warranty but it might be down to wear from previous owner and in that case will need to get the money off the dealer i bought the car from..

I did a test tonight on my fathers rough drive and it's not really felt through the steering but just the clutch tbh. To the post above /\ i'm going to test also a 15 plate Giallo edition they have as a demo car and see if it makes the noise :thumbsup:

'look for a car at the dealership to test drive' :lol:

Ps love the fact you have a Pantera! :respekt:


Just thinking about this TOB issue...if it was that why can i only hear it/feel it over rough roads at low speed and not when on a smooth roads at low speed. Surely i would hear it all the time at low speed? Also i hear this noise the most with clutch down so not engaged..

'

Anyone have the TOB issue and hear sounds like mine?

Several have. There are probably 10 threads on the subject.


http://www.ft86club.com/forums/showthread.php?t=96644

Thanks Tcoat

I still don't get how my issue of hearing and feeling the knock through the clutch pedal over rough roads at low speed has got anything to do with the TOB?? my gearbox generally feels fine apart from being a bit notchy when cold..

There are many more if you dig. I have tried to find a pattern with the reported failures (Model year, mods, driver experience, etc) but there really doesn't seem to be one. Although there have been many reports I don't think that the issue is as rampant as some make it out to be and it is actually only a small percentage of the cars that suffer from it.
Some dealers treat it as warranty and some don't so there isn't even a formal recognition form Toyota at this point. If you suspect it is starting to go then get it fixed ASAP because if you leave it and have a catastrophic failure it can take out a pile of other more costly parts with it.

Thanks for the info Tcoat. Well my dealer definitely thinks this is the issue and will try and do it under warranty but i think the knocking sound/feeling at low speeds is a different issue perhaps..

I would agree with you as it does not match the listed symptoms. Pretty hard to guess what else it could be though.

Google for info on throwout bearings and automotive clutches. Then let's discuss any specific questions you may have. Based on the generality of your question I think this is the best approach.

Well I've had a look and symptoms of grinding when depressing the clutch seem to be TOB issues but i'm not getting this at all :iono:

My bad for not being clearer. Check out some pictures to notice how the clutch release mechanism sits right in between the flywheel/clutch and the transmission. It's not exactly part of either.

When you press the clutch, the TOB moves forward, pushing in the pressure plate fingers. Anything out of line or rolling unevenly will be felt pushing back at your foot. A hydraulic connection between the pedal and the clutch is a mechanical connection as much as any other.

Consider ABS (Anti-lock Braking System) If you haven't ever felt it kick in, you should familiarize yourself with it. Find a safe place to try locking the brakes. 10 MPH is plenty. Just stomp on the brakes and feel the kickback. That's all hydraulics.

Let me know if any of that doesn't make sense or if I'm not even addressing your question.

Thanks dude for the reply!

This sort of makes sense..The most i feel the symptom of my issue is going downhill on my fathers rough track drive with clutch depressed. It feels like there is a knocking like something is loose as if the gearbox or some other part is shaking around and rattling and this is then felt through the clutch pedal so maybe it is the TOB rattling?? My dealer has had the car on a ramp so they must of checked other components for play such as bushings etc but then i'm never sure with garages being that thorough lol

I have activated the ABS once on this car in the wet so i can see what you mean by the similarity in feeling..It's just when you read the following thread like this it scares me that this is an inherent issue with the car that is just normal - http://www.ft86club.com/forums/showthread.php?t=29405

Oh, sure, that's interesting. The engine/transmission is supported at 3 points. It already flops around quite a lot but if it's possible for it to not be centered, I can picture something knocking around. Might even be parts of the exhaust.

It's not something that will leave you stranded but worth getting an experienced pair of eyes onto it. Thanks for the link.

Yeah that is an interesting thread and i told my dealer about that possibility but they ruled it out..anyway i'm booking it in soon and have got to stop analysing all these possibilities and let them have a look i guess

Forgot to say do you get any of the symptoms i've had?

My transmission rumbles a little when it's cold. This morning I heard a cyclic "thunk thunk thunk" as captured on video in another thread so I'll find that one tonight and hopefully allay some concerns.

Absolutely nothing out of the ordinary for a noisy little sports car. I'm a happy camper.

My trans does that too..

My knocking issue doesn't really have any major impact I guess apart from making the car feel cheap when going over rough roads at low speed :mad0260:

I think it's worth having checked. You'll feel much better for both knowing what it is and if possible, fixing it.

Please excuse my ignorance, but what is a "DGM" GT86 ...... ??

:iono:


humfrz

Asphalt. Dark grey metallic(?)

Thanks, @Cole

daaaaa........me :bonk:

Seriously, I thought it was a special model for the UK, which may have something to do with the OP's problem.

:slap:

I'm OK now ....... :sigh:


humfrz

I believe wasn't DGM a special package in europe or the UK? Like it makes it more rally like or something. I'm pretty sure the only colors they get are Pure red, starlight blue, white pearl, black and orange

hmmmmm..........OK, so @rascasse ....... does this rally package exist on your car .. ??

If so, how does it differ from how our regular cars are set up ... ??

Could there be some differences in the steering or suspension that would contribute to your dilemma .. ??

@Cole ..... well the color thing sounded good to me ..... ;)


humfrz

Haha it is indeed just Dark Grey Metallic here in the UK :bellyroll: No I think our cars and yours have exactly the same suspension setup from what I've read. Just interior/standard equipment differences I guess..

God this car rattles inside :mad0260:I've now noticed over rough roads a vibration coming from the passenger side, I thought my GF had left something in the bottle holder or something in glove but nothing..argh!! driving me mad.

On a side note, when I go to 3rd gear, is it normal for the stick to move left and right a bit or would you say that could be a bit of free play?