Welcome 
    Trinity is a company with over 20 years experience building automatic transmissions. GM overdrives are our specialty but we can assist you with the finest performance transmissions available no matter what make or type of use.  If you are just in need of a high quality stock transmission, we can also help with that. So please take a minute and browse our site and see for yourself what we have to offer. This site is not yet complete so if you do not see it online call or email us and we will  try to answer your questions.

Our Specialty :   

   We offer a variety of transmissions and services from full conversions to building high quality transmissions for street or strip or selling performance components so you can build your own. What ever path you choose will can provide you with some of the best service in the transmission business. If you need help deciding what type of controls to use with one of our transmissions or some other model we can do that too. Click on the services link to get help calibrating your transmission controller or other services related tips. We have years of experience developing transmission calibrations and can perform that job with just about any aftermarket controller. If you just want high performance upgrades for your transmission check out our parts section. We also offer an all new 4L80E/4L85E transbrake Unlike the others, this patent pending design will fit in your existing pan and work with your production controls. It is designed to work with either the 4L80,4l80e, 4l85E or 4L85 transmisen we leave off the "e" we are referring to a non electronically controlled valve body. For race applications or to reduce the cost we offer an easy to install full manually shifted valve body conversion kit.

  Services