Halp! 6 speed 3rd gear grind
#1
Halp! 6 speed 3rd gear grind
Just bought a msm stock, 100k old lady owned it. If im in boost 2nd gear and i cant find 3rd Ill either grind 1st or just lock out or maybe 5th. Ive searched everyone says synchro. My guess is its mounts, my old turbo miata had super miata mounts and turbo this one has 100k oem mounts. Someone please Tell me i dont need a tranny rebuild. Ive changed fluid gl5 synthetic and it shifts like butter any tests i can do. I dont have to rev match either so idk any other ideas befoee i throw the teeth rattling super miata ones? Car is immaculate all stock i seriously doubt this lady was banging gears. But **** i dont want a rebuilt one, i want those mazdaspeed shot peened gears. I. Diddnt see big flakes on the drain plug either.
Last edited by samwu8k; 09-11-2014 at 11:53 AM.
#2
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Is there any "slop" in the shifter when the car is in gear at a steady speed? Did you re-build the shifter when you did the fluid change? The shift turret bolts could be loose, or the shifter itself in need of a rebuild, both of those can make it hard to find a gear.
Keith
Keith
#4
Is there any "slop" in the shifter when the car is in gear at a steady speed? Did you re-build the shifter when you did the fluid change? The shift turret bolts could be loose, or the shifter itself in need of a rebuild, both of those can make it hard to find a gear.
U
Keith
U
Keith
#9
BACK FORM THE DEAD. ok i forgot to mention as soon as i got the car i changed all of the fluids to mobil one synthetic **** like a good miata owner should, good idea for a new used car but mobil 1 does not make gl4 fluid for our trannies, i used their gl5 **** just like the owners manual says i could and i got a horrible grind after the car reached normal operating temps.
Dude i have no idea what actually fixxed my grind but its GONE. 100% gone, i can hit peak boost up to redline and ****** the **** out of 3rd gear chirp the tires and no grind. I changed out the slaver cylinder with a new one, i put in that ford 20$/qt fluid and i put in some of those bad *** motor 70D mounts from 949 racing. Thanks every one for your help! i hope this helps others in the future. Im so happy you guys have no idea, i ******* love how this car drives, god dude a miata with a fucked up 3rd gear is NO FUN at all omg. I used to have absolutely no 3rd gear synchro action when the car warmed up, id have to like baby the **** out the 2nd to 3rd shift basically just rev matching it to get it into gear. The **** that makes no sense to me is how the **** is only one gear affected, i kinda felt like 5th gear did it too but idk only rarely. even with the gl5 fluid i could shift quickly trough the other gears. But yea im so glad i dont need a ******* transmission, i just bought this car because my old cars transmission took a ****. when i discovered that 3rd gear grind i was ******* livid! But yea cheers to everyone, that ford trans fluid is nice too, smooth all the time, cold or hot. weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee <3
Dude i have no idea what actually fixxed my grind but its GONE. 100% gone, i can hit peak boost up to redline and ****** the **** out of 3rd gear chirp the tires and no grind. I changed out the slaver cylinder with a new one, i put in that ford 20$/qt fluid and i put in some of those bad *** motor 70D mounts from 949 racing. Thanks every one for your help! i hope this helps others in the future. Im so happy you guys have no idea, i ******* love how this car drives, god dude a miata with a fucked up 3rd gear is NO FUN at all omg. I used to have absolutely no 3rd gear synchro action when the car warmed up, id have to like baby the **** out the 2nd to 3rd shift basically just rev matching it to get it into gear. The **** that makes no sense to me is how the **** is only one gear affected, i kinda felt like 5th gear did it too but idk only rarely. even with the gl5 fluid i could shift quickly trough the other gears. But yea im so glad i dont need a ******* transmission, i just bought this car because my old cars transmission took a ****. when i discovered that 3rd gear grind i was ******* livid! But yea cheers to everyone, that ford trans fluid is nice too, smooth all the time, cold or hot. weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee <3
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