#MUSTANG T5 TRANSMISSION HOW TO#
#MUSTANG T5 TRANSMISSION MANUAL#
#MUSTANG T5 TRANSMISSION MODS#

“The 5.0L V-8 received a 3.35:1 First gear set with a 0.68 overdrive while the 2.3L four got a 3.97:1 First gear and an 0.79 overdrive. Torque rating is just 240 lb-ft.įord was among the first Detroit automakers to use the new World Class T5 transmission in 1985. These smaller input shafts will not hold up to the added torque and provide too low of a First gear ratio. A four-cylinder T5 should never be used behind a V-8, even when the pilot bearing’s inside diameter is decreased to match shaft pilot size. Most four-cylinder T5 transmissions received a 3.97:1 gear set with a 0.79 overdrive and smaller input pilot bearing shaft. While the four-cylinder T-5 may appear to be the same externally as the V-6 and V-8 versions, they are not the same box. Four-cylinder ratios are much lower as a result of the tooth count between gears,” Couture tells Mustang Monthly.Ĭouture tells us Ford also used the T-5 in 2.3L four-cylinder cars through the years. Torque rating for the 2.95:1 NWC T-5 was 265 lb-ft. The lighter Dextron III weight can be used but may adversely effect shifting and wear. “Since Dextron II is no longer available, engineers at Tremec now recommend using straight 50W gear oil in the older non–World Class T5. All the synchronizer rings are made of solid bronze, which are of different size than those found in a World Class T5 because there is no bearing under each gear and the bronze synchronizer rings that the non-World Class T-5 use the heavier Dextron II fluid. All the main shaft gears, First through Third, ride on a solid output shaft with deep oil grooves to provide good lubrication.” He goes on to say, “The lower counter-shaft gears spin on straight cylindrical bearings with a thrust washer in front to provide support when under load. To do this the First gear ratios were in the range of 3.75 to 4.10:1. Most were geared down to allow a small displacement engine to rev easily through the gears. The World Class has a Timken tapered race bearing cup, easily seen from the front of the main case.Ĭouture tells us, “Borg-Warner also provided many other non–World Class gear ratios. If you examine the front of the World Class main case, you will see the difference in counter-shaft bearings. Couture adds that World Class T5 improvements included revised synchronizers and bearings, which makes the World Class easy to identify. More by coincidence the T5 World Class was an improved design engineered to take greater amounts of power and deliver improved shift quality. Because these gentlemen have been working with the T5 for decades, they understand its design and nature better than anyone in the industry, and are willing to share that knowledge with all of us.īruce Couture of Modern Driveline tells Mustang Monthly the “World Class” name had little to do with strength and durability, but instead the T5’s introduction into the world market in the mid ’80s as an improved performance transmission. Great technical information and service are available from Bruce Couture and Paul Coffey at Modern Driveline.

#MUSTANG T5 TRANSMISSION HOW TO#

We’re not going to show you step-by-step how to rebuild a World Class T-5, but instead provide you with basic information to help get you started on your five-speed adventure.

#MUSTANG T5 TRANSMISSION MANUAL#

In the late ’90s, Borg-Warner sold its manual transmission division to Tremec, which is still building new T5 transmissions to this day-they are available from Modern Driveline along with all of the parts necessary to service them. The fully synchronized T5 transmission is a counter-shaft-style helical gear unit. Originally designed and manufactured by Borg-Warner and first offered in the Mustang in 1983, the venerable T-5 has been a Pony Car mainstay for longer than a lot of us have been licensed drivers. The Mustang’s T5 five-speed transmission has been in continuous production for 34 years. Not only does the T5 provide a highway-friendly overdrive, but it also provides a deep First gear ratio for better off-the-line performance.

#MUSTANG T5 TRANSMISSION MODS#

One of the most popular drive-train mods done to early Mustangs is to swap out the non-over driven three- and four-speed transmissions with the later-model overdrive T-5 five-speed.

Mustang t5 transmission