What broke on your 6 speed?
#1
What broke on your 6 speed?
After some reading it looks like quite a few of the 6 speeds have failed while in 4th gear. The thing is, mine will never see 4th. The 5spd finally gave up and so the consideration is taking out the 3.63s and going back to the 4.10s and use 3rd gear in the 6spd. Currently 245lb/ft of torque on a mustang dyno but considering some engine upgrades as well. The other consideration is a TKO 500 or Jerico, but that's at least a $4000 project. Thoughts?
#14
I'm convinced at this point that how long the 5spd lasts behind power is relative to tires and gearing. We went two seasons at about 200whp and one season at 275whp with the 5 speed but could light up the tires by breathing on the throttle. Then we went to the 3.63 rear for traction purposes. In addition to traction, a higher gear is also going to create more load on the driveline in general. The tranny only lasted one and a half events after the change. Poor little guy.
#15
Were it turbo, I'd say run less boost in low gear.
Even so, couldn't you use gear dependant timing or fuel, etc, to keep yourself in traction, instead of over-gearing the car? Just a thought.
My 5 speed also long outlived any expectations, when it did go: I hit a bump during a shift. Interesting about the 6 speeds though...
Even so, couldn't you use gear dependant timing or fuel, etc, to keep yourself in traction, instead of over-gearing the car? Just a thought.
My 5 speed also long outlived any expectations, when it did go: I hit a bump during a shift. Interesting about the 6 speeds though...
#16
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FYI, the S15 Silvia and IS200 use the same Aisin AZ6 that came in the Miata. The S15 guys in particular have a fair amount of empirical data about the failures in their gearboxes since 300+whp SR20s are not uncommon overseas. They seem to have similar issues at similar power levels - good reliability at 300whp, mediocre at 350whp, borrowed time at 400+whp.
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