[70GS455]

Originally Posted by Aluminum Chief

Has anyone used one of these M-23 4 speed transmissions from Auto Gear in Syracuse NY? Or a Hightower 4 Speed Trans?



I am looking for a 4 speed trans for my 67 GTO that will stay together.

I had a Richmond Super T-10 in the car for the last 8 years and I`m tired of changing 1st gear & the cluster gear, last time the main case cracked as well.

I don`t want to cut the floor, it`s a 46k mile original and I have had it since high school.



My best et was a 12.001 @ 113mph, I never had the engine dynoed but should be right around 500 hp & 550 ft lbs of torque.



Engine is a 400 with a 455 crank, Crower Rods, flat tops with 670 heads, solid roller, 71 455 HO intake & carb with HO exhaust manifolds & 2 1/2 inch Pypes full exhaust . Looks stock when the hood is open.



Rear is a Chevelle 12 bolt with 4:11`s



Any 4 speed trans suggestions would be appreciated.



Sorry can`t get the pic right side up.



Thanks KC

Was your T10 iron case? Iron mid plate?

Sent from my SM-T817V using Tapatalk

[Aluminum Chief]

Thanks everyone for the response
Thanks Ray for the flip, how did you do that? Leaning towards the M-23 as well.
Newer all alum T-10