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#1
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Auto Gear M-23 or Hightower 4-Speed Trans
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
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#2
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I have a M22Z, nice unit but have not really hammered on it. Iwould talk to them, they will tell you if you need more trans than they can supply.
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#3
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I had an M22W built by Midwest Muncies behind a 422" SBC. Took everything I could throw at it. I was told some of the M23 parts are on backorder
Tim |
#4
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If going to a Hightower I’m sure you’ll need to cut the floor some. I was in the same boat; 67 GTO owned since HS, also a 46Kmi car, didn’t want to cut it up too much... I went with a G Force G101A and couldn’t be happier; but the Hightower looks like a stout piece. The shifter linkage required some floorpan modifications in my case but what can you do; rod ends take up space. I can take a pic of my panel if you want.
I had previously used an AutoGear M22W with the roller bearing first gear (it wasn’t meant to be a drag car at the time...) but I could tell the transmission was having some issues so I changed transmissions. Any questions just ask. |
#5
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I have an m23 super wide ratio behind a 505, but strictly a street car. I like the trans quite a bit but cannot speak to racing durability. You can hurt the drivetrain with 300 horsepower on slicks easier than you can with 1000 hp on street tires.
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The Following User Says Thank You to i82much For This Useful Post: | ||
#6
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Quote:
You can get a big input shaft Toploader that came in a big block Mustang and make it work. Hey, Pontiac ran a Ford Toploader 3 speed in their cars. Our 66 Catalina 3 on the tree station wagon had one. |
#7
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Fixed it
Here you go Ken. I have been looking at both gearboxes also. I heard good things about both. I am leaning to the M23.
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#8
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Quote:
Sent from my SM-T817V using Tapatalk |
#9
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Trans
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
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#10
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Intended use dictates what to get. Street/strip the M23 is probably the way to go. Strip only the Hightower/G101A/Jerico wins.
The G101A has straight cut gears and dog rings, same as a Jerico; I’m not sure about the Hightower but I would expect the same. Having dog rings on the street is kind of a pain; double clutching for slow speed shifts, rev matching to downshift, and coming to a complete stop before putting it into gear are a few things that come to mind to prevent gear clash/clunk. Or just shift it like you mean it and be prepared to rebuild it at some point, which will happen. |
#11
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Quote:
Thanks for the input. KC
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#12
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I grenaded two ST10's......
Call Paul Cangelosi and get one built with Supercase and trick internals. https://www.5speeds.com/cart/index.p...&product_id=58
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Home of WFO Hyperformance Shaker induction. |
#13
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Quote:
I purchased all the parts from him every time the T-10 let go, he is a very knowledgeable & nice guy.
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#14
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I like the M23 also. You can drive up to NY and watch them build your trans. Well that was before the virus don't know about now. Paul knows his stuff. Jody's Transmission in Reading,PA can build one also. He's a racer.
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#15
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I have one of Paul's Muncies. Dealing with him was a pleasure. From confirmation to delivery was 3 weeks or so. The tranny has held up well. He has a cool YouTube channel too.
I felt that financially it didn't make sense to assembly the tranny myself vs. pay Paul to do it. Especially if you need to buy a press. Good luck!
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#16
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Trans
Thank You
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#17
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I've not used either but in our area a lot of guys use the Hightower in the SEGA and Southern Outlaw Gasser cars. It is a very strong and reliable transmission, being locally built helps as well.
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1999 WS6 Formula, 1 of 175 1967 GTO Linden Green 4 spd, A/C, survivor 1967 Lemans convt 1967 Firebird 400 bench seat, deluxe interior, auto 1965 GTO 462, KRE unported D-port heads, Bullet 234/244 cam, th400, tight 10" converter, 3.73 gears, 87 octane, 3440 lbs. empty,1.59 60ft, 7.159@95.33 (1/8), a real daily driver, been totaled, rolled 3 times, hit a tree airborne. 1961 Catalina 2 door htp 1960 Ventura 4 door htp wife's car 1960 B'ville 2 door htp 1960 Catalina Wagon wife's car too |
#18
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Ive heard alot of guys in sega have switched to the g force which is what i would recommend.
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Illinois Outlaw Gassers 6.27@107 9.97@131 |
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