Transmission Oil Leak? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Euro7R · 09-13-2015, 09:20 PM

Noticed oil leak on the top & driver side of the transmission. Any thought of what this issue could be.

I checked ground and no oil, I'm assuming the bottom plate cover caught it, if anything. I don't smell anything burning/oil smell when driving.

The only thing I noticed is, after driving awhile (1 hour or so), I notice the gear shifter area/center console becomes quite warm. I assume that's normal nature of heat coming from transmission.

humfrz · 09-13-2015, 10:11 PM

Quote:

Originally Posted by Euro7R

Noticed oil leak on the top & driver side of the transmission. Any thought of what this issue could be........

hmmmm..........AT or MT ... ??

(I can't tell from the picture)

Usually, transmissions don't leak out of the top. Maybe something else is leaking on it .. ??

humfrz

Euro7R · 09-13-2015, 10:33 PM

Quote:

Originally Posted by humfrz

hmmmm..........AT or MT ... ??

(I can't tell from the picture)

Usually, transmissions don't leak out of the top. Maybe something else is leaking on it .. ??

humfrz

AT. Don't think MT/AT would matter in this case? Or does it, I'm not a tranny expert haha.

My friend asked if I didn't tighten the fill hole of the tranny, but I haven't done a single tranny oil change, so that makes it a bit puzzling.

There isn't anything on top of the tranny. Unless I am wrong?

Thanks

humfrz · 09-14-2015, 12:25 AM

hmmm....... you might check those heater hoses, where they go into the firewall, for leaks. A leak from them could be following the firewall down and dripping onto the top of the transmission.. ??

I suggest you reach back and get a sample of the dark stuff and see if it feels and smells like oil.

Maybe clean off the top of the transmission with something like brake cleaner and see if the "stain" returns.

OR, wait until someone who knows what they are talking about, to come along and chime in ......

humfrz

Ultramaroon · 09-14-2015, 12:30 AM

Can you take a couple more photos from different angles?

yaguphire · 09-14-2015, 12:51 AM

I would have to agree with ultramoon. Need better angles. I don't see red fluid.

Sent from my Nexus 5 using Tapatalk

Euro7R · 09-14-2015, 12:55 AM

Quote:

Originally Posted by yaguphire

I would have to agree with ultramoon. Need better angles. I don't see red fluid.

Sent from my Nexus 5 using Tapatalk

That's the best angle I can get in with my phone lol.

I stuck my hand in and it's definitely oil. Just don't know where it's coming out. There's this black rod on the top, I notice it's got oil around it, but no idea what it does.

moy_frs · 10-06-2016, 01:28 AM

Hmm I have noticed the same thing going on with my FRS automatic as well did you find the solution??

DaJo · 10-06-2016, 04:20 AM

That is the transmission pressure breather (relief) hose... It's "normal" for some oil residue (oil condensation) to build up around that area... However... if you are noticing alot... enough to cause; say, a drip, that's not normal.

This is only for the AT FR-S/BRZ.

BirdTRD · 10-06-2016, 06:47 AM

I saw the same thing last week when I did my Trans Fluid change. Noticed it first on the drivers side, toward the rear and followed it up to what appeared to be a breather. Pic is from the top looking down. Like @DaJo says, probably normal.

mikev77 · 12-12-2016, 11:01 PM

Mine has the same issue. Have you got it looked at since this was posted? I have almost 30k miles on my 2013 frs auto and the whole top of the transmission seems to resemble your "leak". Most of the grime was built up around the back of that hose that DaJo mentioned. Its just dark, gritty grime. I was noticing a faint buring smell on WOT and a few regular drives that caused me to pop the hood and look around. Everything else looks bone dry. I plan on dropping the bottem cover and seeing if there is any fluid down there, but from what I have seen it looks dry. The top of the transmission is the only part that looks grimey. Could this residue be causing the burning smell?

roddy · 12-13-2016, 07:55 AM

Pretty sure DaJo nailed it...

09-13-2015, 09:20 PM	#1
Euro7R Senior Member Join Date: Feb 2013 Drives: 2013 Subaru BRZ Location: Canada Posts: 132 Thanks: 13 Thanked 23 Times in 18 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Transmission Oil Leak? Noticed oil leak on the top & driver side of the transmission. Any thought of what this issue could be. I checked ground and no oil, I'm assuming the bottom plate cover caught it, if anything. I don't smell anything burning/oil smell when driving. The only thing I noticed is, after driving awhile (1 hour or so), I notice the gear shifter area/center console becomes quite warm. I assume that's normal nature of heat coming from transmission.

09-14-2015, 12:30 AM	#5
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,865 Thanks: 52,120 Thanked 36,513 Times in 18,917 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	Can you take a couple more photos from different angles? __________________ service manuals

10-06-2016, 04:20 AM	#9
DaJo FT86Club Vancouver Join Date: Jun 2012 Drives: BRZ Sport-Tech; Drove: MR-S, AE86 Location: Vancouver, BC Posts: 2,532 Thanks: 391 Thanked 1,178 Times in 633 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	That is the transmission pressure breather (relief) hose... It's "normal" for some oil residue (oil condensation) to build up around that area... However... if you are noticing alot... enough to cause; say, a drip, that's not normal. This is only for the AT FR-S/BRZ. __________________ 1984 AE86 BT 20V 5MT 2007-2012 2000 MR-S 5MT 2010-2012 2013 BRZ Sport-Tech 6AT Since '12 (OEM+ STI tS Build) 2015 Lexus IS250 AWD F-Sport 2 2015-2018 2018 Lexus NX300 F-Sport 3 Since '18

12-13-2016, 07:55 AM	#12
roddy Senior Member Join Date: Apr 2012 Drives: '13 Ultramarine Location: Ontario Canada Posts: 2,243 Thanks: 1,476 Thanked 1,165 Times in 685 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Pretty sure DaJo nailed it... __________________ no man with a good car needs to be justified...

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09-14-2015, 12:25 AM	#4
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,866 Thanks: 28,787 Thanked 31,813 Times in 16,424 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	hmmm....... you might check those heater hoses, where they go into the firewall, for leaks. A leak from them could be following the firewall down and dripping onto the top of the transmission.. ?? I suggest you reach back and get a sample of the dark stuff and see if it feels and smells like oil. Maybe clean off the top of the transmission with something like brake cleaner and see if the "stain" returns. OR, wait until someone who knows what they are talking about, to come along and chime in ...... humfrz

09-14-2015, 12:51 AM	#6
yaguphire Senior Member Join Date: Sep 2013 Drives: white-out FR-S Location: Austin Posts: 170 Thanks: 12 Thanked 15 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I would have to agree with ultramoon. Need better angles. I don't see red fluid. Sent from my Nexus 5 using Tapatalk

10-06-2016, 01:28 AM	#8
moy_frs Junior Member Join Date: Dec 2015 Drives: Scion FR-S Location: Van nuys Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hmm I have noticed the same thing going on with my FRS automatic as well did you find the solution??

12-12-2016, 11:01 PM	#11
mikev77 Member Join Date: Nov 2014 Drives: 2013 FRS 10 series Location: Hawaii Posts: 30 Thanks: 14 Thanked 10 Times in 10 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Mine has the same issue. Have you got it looked at since this was posted? I have almost 30k miles on my 2013 frs auto and the whole top of the transmission seems to resemble your "leak". Most of the grime was built up around the back of that hose that DaJo mentioned. Its just dark, gritty grime. I was noticing a faint buring smell on WOT and a few regular drives that caused me to pop the hood and look around. Everything else looks bone dry. I plan on dropping the bottem cover and seeing if there is any fluid down there, but from what I have seen it looks dry. The top of the transmission is the only part that looks grimey. Could this residue be causing the burning smell?

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