wonele67

I have a '67 Mustang with a 410 hp / 438 lb torque. I've had an issue with the transmission locking up after "pushing" the RPM's over 4500-5000.
I'm told the T5 I have isn't strong enough to handle my motor.
Also told I need the Tremec 3550 because that WILL handle it..
your opinions please??
Thanks.

88 orangepeel notch

Yeah, that's probably pushing the limits of a stock T5. But there's guys that have taken stock T5s in the 10s. If your not aggressive with the shifting, they can hold quite a bit of power. You can also rebuild them with aftermarket internals that will easily handle your power. I don't know what's involved with the 3550 swap, but a good T5 rebuild is going to be cheaper. Just my opinion.

wonele67

What about a T45? Will that be better than a 3550?

mjr46

a-5 tranny astro performance

bluebeastsrt

Its all about the budget like always. If you have the money buy something you will never have to worry about. If your budget is limited 88 makes a nice point.