Performance
Automatic
Transmissions

Our innovative automatic transmission builds deliver unparalleled performance backed by countless hours of data driven R&D and track testing.
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68RFE Performance Diesel Transmission for RAM 2500, RAM 3500 Trucks - Built by WP Developments, West Lafayette, Indiana
10R80 Performance Automatic Transmissions from 500 HP to 1000 HP | WP Developments
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Performance diesel transmission Builds

47RE, 48RE, 68RFE, AS69RC, Allison, 4r100, 5R110, 6R140
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Services

Full Service Diesel Repair, Transmission Install, Turbo replacements, Fuel Systems
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Transmissions Built for the Long Haul

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10-Speed Transmissions -
Focused on the Future

10-speed solutions are developed through field testing and R&D derived from our own 10R80 and 10R140 trucks.

Automatic Transmission Excellence

WP Developments has over 15 years of experience designing and developing parts for highly strained automatic transmissions, giving us the opportunity to collaborate with many industry leaders in testing the durability of their products.

Our expertise allows us to provide a variety of services including custom parts, cab removal, oil changes, transmission swaps, electrical diagnostics, and much more. We are a diesel specialist striving to solve the industry's biggest challenges from 3-speed to 10-speed transmissions.

Transmission Tech Tips

Learn from our latest tech tips, videos, articles, and podcast appearances.

Article

10L1000 Transmission Clutch Clearance and Torque Specifications

Find clutch clearance and torque spec information for your next 10L1000 transmission rebuild.

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Video

Why do 68RFE Sprags Fail?

Ethan Patterson of WP Developments explains the ends and outs of a roller type sprag vs a factory style sprag and why we use what we do with each build.

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Article

68RFE Checkball locations and descriptions for 07.5-18 and 19+ years

Eliminate failure by inserting 68RFE check balls into the correct location.

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What Our Customers Say

Performance Automatic Transmission Reviews

"Ethan and his team have helped me tremendously with my 2500 Cummins from a built trans to turbo set up and more! He has helped me every step of the way and is just an awesome person and business to do work with! Thanks Ethan for your knowledge and help it’s truly appreciated!"
Keith D.
"Ethan and the crew are the go to for 68RFE action. Mild or wild you know it's done right!"
Cody M.
"These guys are some of the brightest and the best when it comes to transmissions. Good people and  very knowledgeable!!"
Christopher N.
"Ethan is a great dude! Very knowledgeable an will be getting my service again!"
Aaron H.
"Great customer service. All my questions were answered promptly and thoroughly. Look forward to doing business with them again."
Eric H.
"Ethan was awesome to work with.   He definitely knows his business and kept me informed every step of the way.  Thanks for taking care of my truck and getting it back to me so quickly.  I will definitely be back."
Jorge P.
"Helped me out not once, but twice. Ethan and Chris both know their way around diesel.. Highly recommend them over the competition."
Tyler M.
"I will be getting my car in as soon as I can...most importantly, I know Ethan personally and I'm incredibly impressed with his knowledge and ethics! He is top on my list of people I would trust."
Jodi J.
"So far i cant thank the crew enough at WP Developments diesel performance.  Im looking forward to this long road ahead as we get ready for ucc together.  Thanks a bunch everyone involved for making this dream a reality."
Jay L.
"Best guys to work with. They will figure out a plan for your truck. They helped me with some information and what caused problems for my truck."
Bobby T.

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