Mazda Rotary Club

General => General Technical => Topic started by: netscient on March 11, 2009, 10:44:49 PM

Title: Gearchange \'Crunch\'
Post by: netscient on March 11, 2009, 10:44:49 PM
My FD has developed a \'crunch\' when changing up into 2nd and 3rd gears - it is now quite strong.  Don\'t have this issue when changing down gears or in any other gears.  Also doesn\'t help how quickly I put iot into gear or whetehr the engine / gearbox has warmed up.
 
Am I looking at a new / rebuilt gearbox? :3Confused
Title: Gearchange \'Crunch\'
Post by: Nik da Greek on March 11, 2009, 11:28:18 PM
It\'s the synchromesh that matches the gear speeds when swapping cogs that\'s taken a bash. It\'s a very common problem, usually the result of a hurried/slightly botched gearchange whilst everything\'s still cold and stiff (ooer!). They tend to last a long time without really getting any worse, though it\'ll probably fail altogether eventually. It\'s usually more a matter of how long you can stand it before you give in and get the gearbox rebuilt!

Secondhand ones often float by on eBay or for sale here for round about a hundred quid-ish, which may save you the hassle of rebuilding yours and the time with the car off the road, but there\'s no guarantee you wouldn\'t be buying one in just as bad a state. Fourth to fifth is a common synchro to fail, as well, so mind you don\'t "do" that one, too :Giggle!

HTH :Thumbs-up
Title: Gearchange \'Crunch\'
Post by: gandyRX on March 12, 2009, 01:15:00 PM
thats the same problem ive got too, only started a few months ago but once the gearbox gets warm its better kinda
Title: Gearchange \'Crunch\'
Post by: AndyGen3 on March 12, 2009, 02:25:57 PM
Wear and Tear im afraid... Mine does it from 3rd to 4th at full tilt... Really annoying coz you know it will have to be rebuilt soon after!!
Title: Gearchange \'Crunch\'
Post by: NurburgRob on March 12, 2009, 07:37:56 PM
I\'ve got transmission noise in mine at low rpm :(

Get a gearbox oil change, can only help.
Title: Gearchange \'Crunch\'
Post by: SiH on March 12, 2009, 07:59:25 PM
Mine makes a racket, and crunches most of the gears, it\'s on borrwoed time :(
New oil made no difference at all. Post 350 is going to kill it quick i reckon :(
Title: Gearchange \'Crunch\'
Post by: stacy on March 23, 2009, 11:59:08 AM
Syncros are for the ladies. Get a dog \'box.

:burnout

;-)
Title: Gearchange \'Crunch\'
Post by: jackaleks on March 24, 2009, 12:42:05 PM
Quote from: stacy;592863Syncros are for the ladies. Get a dog \'box.
 
:burnout
 
;-)

wonder if you can actually get a dogbox for the fd that doesn\'t cost more than the car... love the sound of those things!