Sale!
 
5 out of 5 based on 3 customer ratings
(3 customer reviews)

Muncie Super Duty M23 Super Case 4-speed Drag Racing Rock-Crusher.

$ 2,949.00 $ 2,699.00

Severe Duty M23 gearboxes feature enlarged steel ‘thrust button’ case assembled modular countershaft clusters with ground drive gears, unit cage needle bearings, integral countershaft spacer tubes and carbonitrided over sized synchronizer hubs. Slick Shift 18 spline hardened sliders. Small pad Crowned Steel Forks. Welded Shift Shafts. Forged Brass blocker rings. Main drive oil seal input shaft and bearing retainer. 34 tooth 1st super strong 1st gear (stronger that the M22 1st gear). C355 Forged Aluminum mid plate. Lightened main shaft for less rotating mass. The M23 is the strongest Muncie style 4-speed available.

Complete gear polishing available for road racing and serious competition; $100

M23 CLOSE RATIO, m23w WIDE RATIO AND m23z RATIO

GEAR POLISHING $150

MANY DIFFERENT RATIOS AVAILABLE. CALL JEFF FOR ALL THE DETAILS TO THIS SUPER SERVE DUTY M23.

Qty

3 reviews for Muncie Super Duty M23 Super Case 4-speed Drag Racing Rock-Crusher.

  1. 5 out of 5

    :

    Jeff, the M23W was everything I was hoping for and more. This transmission is awesome and it has removed all the vibration I’d previously endure when running my tired old M20. Great to have the peace of mind that I have a trans that laughs at the torque my Olds 467 puts through it. Thanks for your great work! Dave ’69 Olds 442

  2. 5 out of 5

    :

    Ordered this M23w for my 69 Chevelle Pro Street with 496/700HP. This M23 takes everything I do to it without skipping a beat. At the track of just beating up on the Mustangs or new Camaro’s. Thank you!!!! John

  3. 5 out of 5

    :

    Jeff, I have to thank you for building me a killer M23 for my 69 454. No more killing the Super T-10’s. The M23 is outstanding. Neil

Add a review

Category: