Resources
Knowledge. Tools. Results.
Free tools, tech guides, videos and downloads to help you make smarter decisions, build stronger transmissions, and win more races.
Expert Knowledge
30+ years of hands-on racing experience.
Free Downloads
Specs, checklists, and setup guides.
How-To Videos
Step-by-step videos from our team and shop.
Tech Guides
In-depth articles on performance & reliability.
Tools & Calculators
Gear Analyzer
Calculate tire sizes, gear ratios, RPM, MPH and shift points to find the perfect setup for your truck.
Ratio Calculator
Find the ideal gear ratio for your engine, track and tire combination.
HP Requirement Calculator
Estimate the horsepower capacity you need based on weight, ET, and track conditions.
Setup Checklist
Download our complete checklist for transmission builds, installs and track prep.
Guides & Downloads
Featured Videos
GEAR BUILT POWER
Take a closer look at the gears that keep heavy-duty trucks moving. Precision-built components, rugged construction, and serious strength where it matters most.
BUILT FROM THE INSIDE
Inside every hard-working transmission is a system built for serious power. Precision parts, rugged construction, and the strength to keep trucks moving.
Frequently Asked Questions
What is the best gear ratio for my truck?
It depends on your power band, tire size, rear gear, and track. Run your numbers in the Gear Analyzer — then call Jimmy to dial it in.
How do I know which clutch is right for me?
Crower and Atlas 12.5″ clutches cover most semi-truck race applications; the right choice depends on horsepower and racing type. See our clutch page.
How long does a rebuild take?
Typically 1–2 weeks for clutches and several weeks for full transmission builds, depending on parts and season.
Do you offer tech support?
Yes — direct builder support. Call the shop and talk to Jimmy or the team about your setup.
What's the break-in procedure?
Every build ships with a written break-in procedure. Download the general version above, and follow the sheet included with your unit.
Need help choosing the right setup?
Our team is here to help you build a transmission that wins.