Originally posted by twinturbosaleen
I have never in my life seen a syncroniser break.. they just wear and then the shifting becomes notchy.
when they proshift transmissions i seriously doubt you will find a stronger gear then the heat treated 4340 high nickle content steel the tko gears are already made of.
as for my clutch its a dual disc mcloud wich can hold 1200 foot pounds of torque no problem.. the same clutch that is recomended for use with liberty or gforce transmissions for 1000 plus horse use on the street.
as for tko2
all the tkos now come with the same gears in them for 1-4.. all of them, they were not improved stength wise.. the diference is the cluster has replaceable indivudal pressed on gears instead of haveing a one piece cluster so its easier to service individual gear failures.
i personaly hate proshifted transmissions.. I just do not think the 1 tenth i may gain in et is not worth the sacrifice in street ability.
I have NEVER in 5 years of haveing a tremec then a tko in my car missed a gear .. So its not much of a issue for me.
my trany lasted for a long time in the car when it was a ten second car at 3500 pounds non proshifted.
when iturned the wick way up i simple over powered it.
knew you had a beefy clutch in there somewhere.
Proshifted transmissions are for some people, and others such as yourself hate them. Indeed it will last at 10 sec power if the guy behind the wheel knows how to shift. no biggie.
The 1 tenth reduction that means nothing to you might mean everything to a headsup racer or someone not looking to leave any E.T on the table. Again, personal preference. not a big issue.
My point is, under a racing condition *at the track synchronizers will fail under powershifting *SOONER than a proshifted tranny will! The design does not tolerate, and was not designed for full throttle shifts, such as a PS tranny. This is the point I think you are arguing, or atleast the one that I am defending..
Do I believe, and has it been proven that a proshifted tranny will last longer at the strip.... YES. check around you won't find hardly any synchro'd setups in headsup racing.
Why do you think simi's and dump trucks use a very simular pattern to the proshifted transmissions some put in their cars, it's a durability issue. . Have you ever driven a commercial truck? It just takes more time, but people do it daily. Same case with a PS'd Tremec or T5. It will not drive like your regular 5spd f150, but it's not as weak either.
There is a much larger chance regardless of whether or not you *miss the gear* that all of those little syncrhos are getting beat to hell during a strip run, take them out, Proshift the tranny and you will not be slowly tearing the transmission up over time as you would with the factory built synchros.
My 3550 lasted forever at the strip, at one time goofing off I missed third hard testing out on the street, ( 1 time, that I remember) anyway because of this 3rd gear always had a loud "click" when powershifted.. Did 3rd fail for me, no but was it deteriorating from an engagement standpoint because of the damage to the synchros? ..... (yes).
Fact is, some people tool around on the street and occassionaly make a pass down the track, while others are constantly running the car at the strip and on the street. Under these conditions, if you can learn to drive it on the street a proshifted tranny will last longer and be much more beneficial.