TheVDM Posted July 28, 2015 Report Share Posted July 28, 2015 The synchromesh on my gearbox has been crunching when dropping down into second gear since I bought it. I know that it had been sitting for a few weeks before I bought it. Since I've owned it I've been avoiding/being careful with dropping down into second gear. Today I was driving the Celica in auto pilot as it's currently being used as a daily drive as my other car is off the road for MoT work, coming back from my daily errands earlier on I noticed that I'd been dropping down to second gear and it was no longer crunching, so spent the rest of my drive home consciously dropping down to second from 3rd and 4th... It only crunched when I tried dropping to second at 40mph (not my usual driving style), other than that it seems fine. Is it possible that the synchromesh isn't actually worn but was just a bit sticky after sitting for a while? I don't know much about the innards of gearboxes so haven't got a clue how they work or if that's possible. If it is possible it's just sticky I'm guessing a transmission fluid change will help it out. Link to comment Share on other sites More sharing options...
carlasumm Posted July 28, 2015 Report Share Posted July 28, 2015 start with the cheapest thing and work on from there so get new fluid in there and see what happens Link to comment Share on other sites More sharing options...
TheVDM Posted July 28, 2015 Author Report Share Posted July 28, 2015 Cool, I'll go for some new fluid in the box. I've just got back from picking the other half up from work and noticed that it was crunching again until everything was warm again (a bit longer than the engine warming up) so there's a chance that the oil in there is naff. Link to comment Share on other sites More sharing options...
Sherv Posted July 30, 2015 Report Share Posted July 30, 2015 Definitely use a high quality oil and go from there first 1 Link to comment Share on other sites More sharing options...
TheVDM Posted July 30, 2015 Author Report Share Posted July 30, 2015 Definitely use a high quality oil and go from there first Do you have any recommendations for a good quality gearbox oil? Link to comment Share on other sites More sharing options...
carlasumm Posted July 30, 2015 Report Share Posted July 30, 2015 dex11 auto trans seems to work really well Link to comment Share on other sites More sharing options...
TheVDM Posted July 30, 2015 Author Report Share Posted July 30, 2015 dex11 auto trans seems to work really well In a manual? Link to comment Share on other sites More sharing options...
carlasumm Posted July 30, 2015 Report Share Posted July 30, 2015 (edited) Yep you can still use it was recommended to me ages ago and nit used anything else since Edited July 30, 2015 by carlasumm Link to comment Share on other sites More sharing options...
SKINY Posted July 30, 2015 Report Share Posted July 30, 2015 i always use comma fluids, probly cheaper buying a 5l jug instead of 3x 1l jugs, in fact 5l for the gt-four box was the same price as the 3l for the GT box. normally crunchy grindy gears mean box is on its way, was 2nd gear i lost in 1 box then the diff went in the other box. Ive a good low mile box here 1 Link to comment Share on other sites More sharing options...
carlasumm Posted July 30, 2015 Report Share Posted July 30, 2015 , was 2nd gear i lost in 1 box then the diff went in the other box. Ive a good low mile box here ya might be better with an auto before you destroy any more Link to comment Share on other sites More sharing options...
TheVDM Posted July 30, 2015 Author Report Share Posted July 30, 2015 ya might be better with an auto before you destroy any more I've only ever driven manuals, the gearbox on the Celica has had a crunch ever since I bought it (earlier this month) so I'm glad to say the problem with it isn't me Link to comment Share on other sites More sharing options...
SKINY Posted July 30, 2015 Report Share Posted July 30, 2015 ya might be better with an auto before you destroy any more an auto gt-four wood be fun, maybe its the way i drive, i tend to use the box as opposed to brakes to slow down lol Link to comment Share on other sites More sharing options...
TheVDM Posted July 30, 2015 Author Report Share Posted July 30, 2015 an auto gt-four wood be fun, maybe its the way i drive, i tend to use the box as opposed to brakes to slow down lol Perhaps bigger discs again are required Link to comment Share on other sites More sharing options...
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