Potential bad gear box? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

usptwins · 01-30-2013, 10:43 PM

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

uncivilised · 01-30-2013, 10:52 PM

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.

GoSharks · 01-31-2013, 12:15 AM

Quote:

Originally Posted by reeves

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?

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.

shu5892001 · 01-31-2013, 12:54 AM

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

DriftEightSix · 01-31-2013, 01:58 AM

Quote:

Originally Posted by usptwins

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

All rpms.

Quote:

Originally Posted by uncivilised

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.

Hmm interesting.

Quote:

Originally Posted by GoSharks

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.

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

Quote:

Originally Posted by shu5892001

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

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

Mr.Jay · 01-31-2013, 02:43 AM

Quote:

Originally Posted by DriftEightSix

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

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.

Quote:

Originally Posted by DriftEightSix

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

His 2nd gear not 2nd transmission.

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

usptwins · 01-31-2013, 05:59 PM

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

Metabrz · 01-31-2013, 07:03 PM

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.

DriftEightSix · 01-31-2013, 07:40 PM

Quote:

Originally Posted by usptwins

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

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.

its_the_biz · 02-23-2013, 03:50 PM

Quote:

Originally Posted by DriftEightSix

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.

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.

Allch Chcar · 02-23-2013, 04:15 PM

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?

XPR Small Block · 02-23-2013, 05:07 PM

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

DriftEightSix · 02-23-2013, 05:29 PM

Quote:

Originally Posted by its_the_biz

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

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.

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.

GoSharks · 02-24-2013, 12:00 PM

Quote:

Originally Posted by reeves

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?

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

01-30-2013, 10:43 PM	#15
usptwins Toyota Soul Join Date: Aug 2012 Drives: 96 taco Location: Louisiana Posts: 528 Thanks: 725 Thanked 99 Times in 78 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Any RPM's?? Or at high RPM's? __________________ No replacement for Displacement??? Tell that to the people with a 2JZ.

01-30-2013, 10:52 PM	#16
uncivilised Member Join Date: Oct 2012 Drives: 86 GT Location: australia Posts: 74 Thanks: 31 Thanked 27 Times in 20 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(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. Last edited by uncivilised; 01-30-2013 at 11:02 PM.

01-31-2013, 05:59 PM	#21
usptwins Toyota Soul Join Date: Aug 2012 Drives: 96 taco Location: Louisiana Posts: 528 Thanks: 725 Thanked 99 Times in 78 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	shit... idk man. bad synchro's?? __________________ No replacement for Displacement??? Tell that to the people with a 2JZ.

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XPR Small Block Member Join Date: Feb 2013 Drives: Scion Frs Location: Santa Rosa, Ca Posts: 70 Thanks: 21 Thanked 9 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	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

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