The Gear Box Transmissions
MUNCIE - T56 - TR6060 - T5 - SUPER T10 - 3550 - TKO - 3650 - TOP LOADER



Fall is here and so is the competition!

Don't get left on the line with an old, worn out and weak OEM Muncie, upgrade today and crush'em!


Order now!   Complete NEW Assembled M22 Super Rock Crusher Transmission

Order now!  Complete NEW Assembled M20 Transmission

In Stock!           Complete Severe Duty Italian Gear Sets 

NEW! Muncie M23 'Z' Ratio 2.98 1st Gear sets-Call for Details






* Now Rebuilding Tremec T56 Stage 1Stage 2

Have your Tremec T56 shipped to our rebuild center for rebuild or upgrades. Call for details





NEW!  To determine which speedometer tooth count you need before ordering your needed speedo gear, Use this TCI® Speedometer Gear Calculator




 Super Muncie M20 Do It Yourself Kit 

  Super Muncie M22 Do It Yourself Kit

Severe Duty Muncie M23 Do it Yourself Kit 


 T56 Mounting Adaptor Plate

Plate will allow you to remove a Muncie, T10, Saginaw or T5 transmission, and mount an LS T56 transmission



TheGearBox.Org and All-TransGearbox.Com have merged and are one in the same company. Both sites sell and ship inventory from the same location, purchase with confidance!

We specialize in all types of manual transmissions, have over 35 years experience in the transmission business and have rebuilt 1000's of transmissions.

Visit our Ebay Store! Verify our reputation and buy with confidence! 

The Gear Box Transmissions, LLC.

Monday - Friday 9-5 Est