We Accept VISA
We Accept Master Card
We Accept Discover
We ship with UPS

When you are ready to orderreview our ordering options in Customer Service then check out the Product Catalog. 
Modern Driveline is a TREMEC Elite Distributor
Full Service authorized TREMEC Elite Dealer including repair center and Warranty repair.  

Have Questions? Send us an email with your details. 
or Call us at
Mountain Time



SEMA Member

FREE Ground Shipping on orders over $100 this week.

Tech Alley               "Where you find all the answers."

Sebring T5 5-Speed .80 Gear Set

The Sebring T5 5 Speed .80 Overdrive gear was originally designed for an Australian Race team over 10 years ago. Other companies have manufactured gearsets based on this very design. Due to overwhelming demand, we are distributing this gearset with competitive pricing and quality you can expect from us.


S80 5th on the left - Factory on the right

This gear set is designed for the Ford World Class T5 or any other World Class T5 using a 28 spline mainshaft,  This close ratio 5th speed gear set is designed for road racing purposes and will yield a .81 ratio overdrive with a 2.95 ratio T5 and a .92 ratio overdrive with a 3.35 ratio T5. If you require this gearset in a General Motors T5 you can substitute a Ford mainshaft in place of the GM piece and change your driveshaft yoke.


Design concept:

The factory Ford Motorsport aftermarket .80 overdrive set used a gearset with a tooth combination of 33 teeth upper and 53 teeth lower. Creating a new set with less teeth and a .100" larger diameter upper gear, realized strength improvements. The new tooth combination of 20 teeth upper and 32 teeth lower yields virtually the same exact gear ratio making it very desirable for road race use. (Note: The factory .80 gear set is no longer available).

S80 on the left - Factory on the right.

Factory gear teeth are much thinner

Other Features:

  • Nickel Chrome Moly (SAE 8620) alloy heat treated for road race applications.
  • Snug press fit assures concentricity and optimum strength.
  • Snap ring land is flat ground to maximize load bearing surface area.
  • Helical cut gears for reduced gear noise when in 5th gear
  • Only .100" larger in diameter than factory .80 sets, allows use of stock bearing.


Installation Hints:

Factory Ford T5 tailhousings only need a small area opened up for the 5th gear to clear properly. The area that is approximately .500" below the bearing land has plenty of clearance. The area after that (marked with black X's) is simply ground open with a die grinder.


One can clearly see in the picture that the S80 upper gear cannot fit through the rear bearing race. Factory .68 overdrive gears can. You must press this gear onto the output shaft after the mainshaft is installed in the main case.

5th Gear Set, T-5, .80OD
(2.95 gear set)
Stock# MD-505-1012

$ 230.00

Ready to buy?
Just add it to your cart >>>>>>>>>>>>
or give us a call at: