Potential bad gear box?
 

when i first purchased the car, the gears would shift right into spot like a hot knife on butter. however, now occasionally the gears would act up and require a little bit of effort to pop into position. and it happens randomly. and other times it would be perfectly smooth. anyone else getting this problem?

Mostly 1st to 2nd?

Weather affects it as well and I highly doubt its a bad tranny tho we did have one car were the dealer forgot to fill the tranny fluid.

Easy fix tho get some Motul in that gear box and you will be fine.

Are you new to driving a MT car? Does this occur during upshifts, downshifts or both?

yes mostly 1st and 2nd. i'll swap out the fluids and give it a try. :thanks:

i took a few year break from driving MT. but i dont feel that is a factor. it happens both up and down shifts.

Mine started crunching into second gear after about 300kms. Is worse when it is cold gets a bit better when it is warm.

I had crunching right up till i had my serviced today :D

It back to being hot knife into butter :D.

I will ask tomorrow what they did to it to make it soo much better!

What mileage are you at?

Mine has been a little tough to get into second when it's cold. Only noticed recently with about 4500 miles. Going to swap out the fluids. Was going to do it when I had around 1k miles, but never got around to it.

Had my transmission replaced for the shifting getting harder then it started grinding going into 4th every time.

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I got the same problem.. 2nd gear randomly grinds. Other times is perfectly smooth.. Switched to Pentosin MTF-2 tranny fluid for 4K miles now, but I still get the random grinds. Pentosin did make shifts feel alot better/easier though, especially when it's cold. Before Pentosin, it was all but impossible for me to shift into 2nd when cold.

I am starting to notice after a long drive (30 minutes or more) the grinds rarely, if ever, occur anymore.. maybe it goes away after the tranny gets really hot?

I put Motul Gear 300 in mine and although it is better it still hasn't fixed 2nd gear when the car is cold and it's below freezing. Above freezing the Motul has definitely made everything much smoother though. I will be trying Pentosin next. Unfortunately it is very expensive. There's only so many times I want to spend $100 bucks to see if some other fluid will make things better. But I will report back on the difference between the Motul and Pentosin for me when I get around to changing it.

Also forgot to mention that if its really bad in the cold double clutching helps a lot

12730 kms. Fixed at around 2000kms and returned less then 1000kms later. if it happens again i am going to bitch my ass off.

It was the only way to change gears!! evens whilst rev matching it wasn't 100% smooth.

Any RPM's?? Or at high RPM's?

Could it just be a characteristic of the gearbox? My altezza j160 does the same thing but its not bad for me.

I'm running redline mt90.

Same experience for me. The transmission is my biggest problem with my BRZ, borders on unacceptable sometimes. I am very nervous shifting from 1st to 2nd in the morning as even with Pentosin it may grind. But better overall with Pentosin.

My 2nd gear almost grinds every time when it was -15.

All rpms.

Hmm interesting.

Yup I know that feeling... this morning it was fine with my car; which im loving!!!

@nd box!?1?! they replaced it and it still happens :S

well damn. I have no clue now. My tranny is great tho i think I'm going to make the switch on fluids before next winter comes.

His 2nd gear not 2nd transmission.

Hope you find the source of your issue. Please report back!

shit... idk man. bad synchro's??

I've installed a Cusco transmission collar mount and this has helped with 1st>2nd, 2nd>1st and 2nd>3rd shifting.

Shifting is faster, more precise and smoother. Shifting from 2nd to 1st at very low speeds is now a possibility whereas before I was not comfortable even trying it.

Downside is there is a little more transmission whine but its not annoying.

Nope cause it was fixed without having any parts replaced... still waiting to hear from the mech about what work he had done to the car... Its killing me not know what was done.

has your issues been fixed yet? if so, what has been done? im still getting the shitty shifting even 1000 miles later, today. :mad0260:

took the car in for the 1 month inspection and asked about it. they said it was normal and thats how the car was made. so im curious.

It sounds like the wrong weight of gear oil for the temperature. If it's notchy when cold but fine after it warms up, the first number needs to be upgraded eg. XXw-XX. I seem to recall that the colder it is the heavier weight oil you need. Any gear oil experts on here?

i think its the opposite with the oil same thing with motor oil colder it is the thinner it needs to be, hotter temps need thicker oils. think about it if the tranny is scratching the syncros when its cold is because the oil isnt able to expand enough to cover all the parts correctly when its warm the tranny is fully coated = fully functional trans

Nope issue returned 500-1000kms laterbooking the car in again soon.

They told me it was normal but I can't see how I for 500km it was smooth has.

Same here. Switched to Pentosin, much better, but still grinds on occasion when cold.

Yep, I got it backwards even after considering it. Lighter oil is better for colder temps.

So is this a normal occurence? I have about 400 miles on my car so far and it grinds going from 1st to 2nd in the cold. Goes away when warmed up though..

sounds like its normal brake in but i still wouldnt want it scratching because thats added wear on the trans.. if it persists i would drain fluid an inspect it for any shavings. maybe change to a thinner fluid??? an also try an sync your rpm with your next gear selection maybe your dropping too many rpms before you ingauge the gear?/ not tryin to knock you just helpful tip..