Gearbox Oil change - Toyota GT 86 Forums UK
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post #1 of 38 (permalink) Old 16th June 2017, 08:27 Thread Starter
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Well I thought it best to change my gearbox oil as it had done 20k with previous owner and quite a few trackdays, I didn't think the box felt too bad to shift but was a tad notchy especially cold, after driving another owners car earlier this week I felt mine wasn't as smooth so needed sorting.
As I already had the oil I thought I best stop putting things off and get on with the job last night and treat myself to the awful smell of gearbox oil!..., im so glad I did as the colour and feel of the oil that came out was not good, very dark and not the smoothest feel, notmuch swarf on magnetic drain plug which was nice to see so no real wear just tired oil I think.

After flushing asome new oil through until it ran clear I then refilled with 2.2litres of Millers CRX 75w90 NT, buttoned it all back up and even just pulling car out garage shift felt much better, in fact on test drive to warm everything through the whole car felt better not just the shift!, probably just in my head but happy I got the job done and box is all good, as its my birthday today I my treat myself to changing rear diff oil tonight

Ian

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post #2 of 38 (permalink) Old 16th June 2017, 09:56
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I have the same oil ready to do a change in mine, but just not got round to it yet


I'll be using the same stuff in the dif.
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post #3 of 38 (permalink) Old 16th June 2017, 10:15 Thread Starter
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What mileage have you done ?

I couldnt believe state of this oil for 20k miles but as mentioned some was track use and car is supercharged for last 5k or so miles which is going to work oil more, i think Toyota recommend changing at 36k miles with what they call "Severe" use to guess that covers track, no recommend change for "normal" use just inspect every 48months/4years.

Im interested to see what comes out of diff tonight, toyota sheet shows replace every 56k miles or 72months/6 years for "severe" usage, nothing for "normal" use same as gearbox just to inspect , i guess if you just potter about they think it maybe never needs changing!

Ian
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post #4 of 38 (permalink) Old 16th June 2017, 10:28
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t's not just in your head. I had the Millers oil put into mine (at about 26K miles I think? Not sure) and it was immediately improved over the Redline MTL stuff I had in there before.

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post #5 of 38 (permalink) Old 16th June 2017, 11:19
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Isn't Diff oil every 20k miles?
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post #6 of 38 (permalink) Old 16th June 2017, 11:34
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Rear diff oil is every 20k miles on our car, replace not inspect.

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post #7 of 38 (permalink) Old 16th June 2017, 13:06
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Rear Diff oil, different in the Subaru bulletin 30K miles, i believe.
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post #8 of 38 (permalink) Old 16th June 2017, 13:10
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I do mine every 2 years regardless of mileage, only do around 5k a year also.

I use the Millers stuff also seemed to defo help with the harder changes when cold.

Avid detailer, happy to help with any Q\'s.
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post #9 of 38 (permalink) Old 16th June 2017, 14:04
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I don't think they even change it unless they have to, only check it. On a lot of cars the gearboxes are sealed and can't be changed at all.
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post #10 of 38 (permalink) Old 16th June 2017, 19:41 Thread Starter
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Ah that makes more sense, think I was looking at wrong section of service schedule

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