67gt390 said:I have a 67 Mustang and would like to upgrade my Toploader for a five speed. I don't want to modify the tunnel. Will any T-5 handle 400 hp?
From what I understand - not pretending to be an expert, just reading books, etc. - the case doesn't have to split to cause failure. Commonly the case will flex. Essentially when the gears mesh they are trying to push away from each other. When the case flexes, the gears end up meshing in a non-ideal manner - if you get my meaning. This happens and it's transparent to the user, until a gear / the gears fail.69Rcode_Mach1 said:It takes a lot of power to split a T5 case. More than most people make, you are talking 650+ rwhp to split a case.
It all depends on how you drive the car. The T5 will survive if you don't powershift it, clutch dump, and hook up hard. If you drive it normally it shouldn't break, it is the abuse. Either way T5's are a hit and miss, some people have them handle decent power and abuse, some people break them with a stock 5.0.
rbohm said:i am going to answer your original question this way;
i have seen stock non world class T5's last several seasons in cars that run well into the 10's, and i have seen world class T5's break behind stock engines. i have also seen the reverse as well. some people can break a lenco with a stock 3 cylinder geo engine, while others can beat on old dagenham's, and not break them. how you treat the trans is the most important part of the equation here. synthetic fluids, proper shifting technique, etc. will go a long way to transmission longevity. if i were in your shoes, i would use a "Z" series T5, and run something like royal purple trans fluid. i would also install a shifter that had short throws, and stop bolts, and properly adjust the stop bolts. i would also learn to flick the shifter from gear to gear, and NOT ram it from gear to gear.
rbohm said:a "Z" series T5, and run something like royal purple trans fluid. i would also install a shifter that had short throws, and stop bolts, and properly adjust the stop bolts. i would also learn to flick the shifter from gear to gear, and NOT ram it from gear to gear.
69Rcode_Mach1 said:It takes a lot of power to split a T5 case. More than most people make, you are talking 650+ rwhp to split a case.
It all depends on how you drive the car. The T5 will survive if you don't powershift it, clutch dump, and hook up hard. If you drive it normally it shouldn't break, it is the abuse. Either way T5's are a hit and miss, some people have them handle decent power and abuse, some people break them with a stock 5.0.
steel1212 said:
That is what I'm doing and I'm inching up on 400 fwhp. I think you would be better off with a TKO 5 speed. Don't they fit into a 67 with out mods? I know I would use one if I thought it would fit correctly.
blkfrd said:330 ft/lbs rating on a T5z is over the life of the trans...100,000 miles.
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