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10L80 Transmission Upgrade

10L80 Performance Transmission Rebuilds 

CDT 10L80 Bench Rebuild. You will need to ship your transmission to us for the rebuild.



  • High-Performance overhaul kit engineered utilizing premium materials for racing
  • Bonded OE Valve Body Plate 
  • Bushing Kit 
  • Pan Gasket
  • Filter
  • Delete Thermal Bypass if applicable 
  • Raybestos GPZ Drop-In Clutch Module (no added clutch capacity)
    • For an additional charge, we can add clutch capacity in the E Clutch Pack and F Clutch Pack - by adding clutch capacity it results in a 10-20% extra holding capacity in that clutch pack.
    • For an additional charge, we can upgrade the CDF Drum to accommodate additional clutch capacity in C Clutch Pack, D Clutch Pack, and F Clutch Pack - by adding clutch capacity it results in a 10-20% extra holding capacity in that clutch pack. 
  • Valve-Body Calibration Options:
    • S1: Increases Line Pressure, Lube Flow, and Clutch Boost Oil
    • S2: Includes S1 and also increases TCC (Torque Converter Clutch) Apply

*$4,775 does not include any Hard Part damage, Torque Converter or TCM/ECM tuning. After an internal inspection of your transmission, we will notify you of any hard part damage that will carry an additional cost. Normal range with available upgrades ranges from $5,000 - $6,000.

If your transmission has very low mileage, we may be able to do an upgrade which is less expensive than the rebuild - please call us to discuss.

Warranty varies according to application. Please refer to Warranty Info page on our website.

Shipping If you need assistance shipping your transmission, we can arrange Domestic Shipping (averages $250 - $500 each way) for your transmission. Please complete the Shipping Questionnaire on our website (listed under the Contact Us tab) if you would like us to arrange shipping.

Transmission Tuning We do not supply a TCM or ECM tune.

Flushing Cooler & Lines We cannot stress enough the importance of flushing the transmission cooler(s) and lines, even if they are new. We recommend using a Hot Flush Machine or something comparable.

Thank you for the opportunity to assist you.


About Circle D Transmission

Why trust Circle D for your 10L80 transmission rebuild? It’s simple: we’ve been a leader and an innovator in the transmission industry since we started back in 1976. Our specialties include GM and Ford rear-wheel drive high performance transmissions and we’re proud to stay at the top of our industry by keeping up to speed on the latest research, development, and technology.

Our knowledgeable team of experts is here to assist you before you even submit your order for a 10L80 transmission rebuild and we’ll be here for you after your purchase or repair is complete. High performance transmissions are our passion, whether it’s for a custom show vehicle, street and strip, mild to wild—we’ll get your horsepower to the pavement where it belongs.

Over the years, our business has grown and changed. What was once a two bay shop in Houston grew into a destination for locals who needed transmission rebuilds and now our offerings have expanded into selling parts for horsepower junkies and providing rebuild services for transmissions shipped to our shop. 

With these services, customers from all over the country can enjoy the same 10L80 performance rebuilds as Houston locals. As a small, family-owned business, we’re thrilled to know that our transmission rebuilds and parts are being used in cars both near and far. Get in touch today to learn more about our services or fill out our performance questionnaire to get started.

Stay Safe and Have Fun!

The Crew at CDT