I bought a toyota corolla sx ae93 1991 model , and it crunches when i change from or to 2nd gear , It doesnt happen all the time but it happends often . what do you guys think could changing the gearbox solve the problem?

I bought a toyota corolla sx ae93 1991 model , and it crunches when i change from or to 2nd gear , It doesnt happen all the time but it happends often . what do you guys think could changing the gearbox solve the problem?

Synchro ʞ©$ɟed? Its a very common thing, especially with 2nd gear. If you have a spare gbox, throw it in. Or just live with it. Just what it sounds like anyway.

Older cars can get a build up of waxy deposits on the gears and synchros, stopping them from moving freely and causing clashing.

Try putting some Redline MTL G/Box oil in for a while, it is good at disolving those waxes, if it's not completely shagged you should see a reduction in clashing in a couple of weeks.

I put some in an AE95 i used to have and it worked beautifully. After i put the Redline oil in, the more i drove it the better it got.

 

OR, it could just be shagged..

 

If you can't afford aother box or a rebuild then it's worth a shot, it's expensive oil but cheaper than a new box.

(you can buy Redline oil at Burson)

Edited January 5, 201214 yr by kryton brown

..and the revs make a difference, as there will be a speed in each gear where the synchros don't do as much work as at other speeds. Our 5K is well-worn, but drives fine if you don't rush it through the gears and change around 3000rpm.

Put a light weight oil in it, you can buy a straight 50 gear oil that will suit it, mine use to only crunch at rpms over 7k so I just learnt to drive it a bit slower.

bleed the clutch and put light weight gearbox oil in it