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Borg Warner T5 Transmission data

Borg-Warner T-5 Transmission Data

Not All T-5's are Created Equal
Not all Borg Warner T-5's are the same. The first T-5 five speeds were introduced to market in 1982, in all things, a AMC Spirit/Concord. In 1983, T-5's were introduced to Mustangs and are currently still used in the V-6 Mustangs. The T-5 is the only American made standard transmission to span almost 20 years of production. Because of the large quantities of T-5's produced, many parts are interchangeable. There are now over 200 different T-5 transmission assembly part numbers and still counting.

World Class & Non-World Class
There are two basic kinds of T-5's, Non World Class (NWC) and World Class (WC). In 1983 and 84 Ford used Non-World Class T-5 to improve performance and gas mileage at the same time. The NWC boxes had 2.95 first gear set with 1st, 2nd, 3rd, gears riding on a solid output shaft. The counter gears spin on straight cylindrical bearings with thrust washer in front. 3rd, 4th and 5th gears used solid bronze synchros. 1st and 2nd gears used fiber linings bonded to steel rings. Torque rating for the NWC was 265ft/lbs.
1985, Ford introduced the World Class T-5 installed with 3.35 first gear set. No longer were 1st, 2nd, and 3rd gears spinning on a solid output shaft. Needle bearings were installed under each gear to reduce drag. The lower counter gears saw tapered bearings. All main shaft synchros were fiber lined steel rings to improve ring surface area while 5th remains bronze. By improving the surface area, the synchro slows the gear faster making for smoother shifts. Torque rating remained the same at 265ft/lbs.

1990 to 1993 the stock Ford production V-8 WC T-5 was upgraded with stronger 3.35 gear set. The nickel content was increased to produce a harder, stronger gear. 2nd and 3rd gear ratios decrease slightly. Synchro linings on 3rd, 4th were improved by changing to carbon fiber to further improve shifting. Longer throw shifter was installed to "easier to shift". Torque rating jumped to 300ft/lbs.
When the 93 Cobra was introduced, so was the "Cobra Spec" T-5. It was the first T-5 with a front tapered output bearing and steel front bearing retainer. The Cobra boxes also received a reverse brake and synchro assembly where there was none before. Just about everything else remained the same. Torque rating was increased to 310ft/lbs.

1994 and 95 were the last two years Ford used the T-5 behind a V-8. In the SN95 Mustangs, the bell housing in both 3.8L and 5.0L was made longer to place the T-5 shifter in the correct location to the body. This in turn made the input shaft longer. The neutral safety switch was eliminated, as it was no longer needed. Everything else remained the same.

Today's V-6 Mustangs sports the last of the T-5s. The T-5 behind the 3.8L is a 3.35 first gear set with a .68 over drive. What makes these different from the rest is the electronic speedometer trigger. No longer is there a mechanical driven cable system. It has the longer input shaft equipped with a steel front bearing retainer and reverse synchro brake assembly. Torque rating is 300ft/lbs.

Ford also used the T-5 in 2.3L through the years. While the 4 cylinder T-5 may appear to be the same they are not. Most 4 cylinder T-5s received a 3.97 gear set with a .79 overdrive and small input pilot bearing shaft. Four cylinder T-5's should not be used behind a V-8, even when the pilot bearing id is decreased to match. Simply put, they will not hold up. Torque rating ~240ft/lbs. Besides first gear is much too low to be usable.

The "Z" Spec

In about 1993 Ford started offering a new service unit to the motorsport crowd. The "Z" spec T-5, also sometimes referred to as "World Class T-5". Most folks, associate the term "World Class" as meaning the best. The T-5z is a 93 Cobra T-5 with 2.95 first gear set and .63 over drive. It has the best of everything. Hardened gears, short throw shifter, steel front bearing retainer, and tapered output shaft bearing. Best of all it has a torque rating of 330ft/lbs. This T-5 can handle up to 450 hp if not drag raced.

So as you can see not all T-5's were created equal. T-5's are a smooth shifting, strong, light weight transmission that can be used for daily driving or medium racing.

One last piece of important information. ALL World Class T-5 use ATF oil and NOT heavy gear oil or Redline MTL! All NON-World Class T-5 use 70 wt gear oil.

B/W Id Source Application Torque Max (lb/ft) Gear Ratios Speedo Drive
Gear
Input Shaft
length
Input Shaft
Pilot Dia (in)
Notes
1352- Year Model Engine 1st 2nd 3rd 4th 5th R
114 Factory 85-86 T-Bird 2.3 T 235 4.03 2.37 1.49 1.00 0.81 3.76 6 7.41 0.59
115 Motorsport 79-83 Mustang 5.0 305 2.95 1.94 1.34 1.00 0.63 2.76 6 7.18 0.668 a
116 Factory 85-86 SVO 2.3 T 250 3.50 2.14 1.39 1.00 0.78 3.39 6 7.41 0.59
126 Factory 85 Mustang 5.0 265 3.35 1.93 1.29 1.00 0.68 3.15 7 7.18 0.668
141 Factory 86 Mustang 5.0 265 3.35 1.93 1.29 1.00 0.68 3.15 7 7.18 0.668
154 Factory 87 Mustang 2.3 240 3.97 2.34 1.46 1.00 0.85 3.70 7 7.41 0.59
155 Factory 87 T-Bird 2.3 T 240 3.97 2.34 1.46 1.00 0.79 3.70 6 7.41 0.59
162 Factory 87-88 Mustang 2.3 240 3.97 2.34 1.46 1.00 0.79 3.70 7 7.41 0.59
165 Factory 86 Mustang 5.0 265 3.35 1.93 1.29 1.00 0.68 3.15 7 7.18 0.668
169 Factory 86.5-89 Mustang 5.0 265 3.35 1.93 1.29 1.00 0.68 3.15 7 7.18 0.668
194 Factory 89-90 Mustang 2.3 240 3.97 2.34 1.46 1.00 0.79 3.70 7 7.41 0.59
199 Factory 90-91 Mustang 5.0 300 3.35 1.99 1.33 1.00 0.68 3.15 8 7.18 0.668 b
200 Motorsport 79-93 Mustang 5.0 305 2.95 1.94 1.34 1.00 0.63 2.76 7 7.18 0.668 a
202 Aftermarket 79-93 Mustang 5.0 305 2.95 1.94 1.34 1.00 0.80 2.76 7 7.18 0.668 c
204 Service 85-89 Mustang 5.0 300 3.35 1.99 1.33 1.00 0.68 3.15 7 7.18 0.668
207 Factory 91 Mustang 2.3 240 3.97 2.34 1.46 1.00 0.79 3.70 7 7.41 0.59
208 Factory 92-93 Mustang 5.0 300 3.35 1.99 1.33 1.00 0.68 3.15 8 7.18 0.668 d
209 Factory 92-93 Mustang 2.3 240 3.97 2.34 1.46 1.00 0.79 3.70 7 7.41 0.59
218 Factory 93 Mustang Cobra 310 3.35 1.99 1.33 1.00 0.68 3.15 8 7.18 0.668 e
219 Factory 94 Mustang 5.0 300 3.35 1.99 1.33 1.00 0.68 3.15 8 7.85 0.668
220 Factory 94 Mustang 3.8 265 3.35 1.93 1.29 1.00 0.73 3.15 7 7.85 0.668
225 Aftermarket 79-93 Mustang 5.0 325 2.95 1.94 1.34 1.00 0.80 2.76 7 7.18 0.668 b,c,d
227 Motorsport 79-93 Mustang 5.0 325 2.95 1.94 1.34 1.00 0.63 2.76 7 7.18 0.668 b,c,d,f
236 Factory 94 1/2 Mustang 3.8 265 3.35 1.93 1.29 1.00 0.73 3.15 7 7.85 0.668
238 Factory 94-97 Mustang 3.8 265 3.35 1.93 1.29 1.00 0.73 3.15 8 7.85 0.668
239 Aftermarket 93 Mustang Cobra 310 3.35 1.99 1.33 1.00 0.68 3.15 8 7.18 0.68 c,e
242 Factory 94-95 Mustang Cobra 5.0 310 3.35 1.99 1.33 1.00 0.68 3.15 8 7.85 0.668 e
246 Factory 94-95 Mustang 5.0 300 3.35 1.99 1.33 1.00 0.68 3.15 8 7.85 0.668
249 Motorsport 79-93 Mustang 5.0 330 2.95 1.94 1.34 1.00 0.63 2.76 7 7.18 0.668 e,g
251 Aftermarket 79-93 Mustang 5.0 330 2.95 1.94 1.34 1.00 0.63 2.76 7 7.18 0.668 c,e
253 Aftermarket 94-95 Mustang Cobra 5.0 310 3.35 1.99 1.33 1.00 0.68 3.15 8 7.85 0.668 c,e

Input Shaft = 1-1/16 inch/10 spline
Ouput Shaft = 28 Splines

Notes:
a) Motorsport M-7003-A
b) Improved Steel Alloy
c) Aftermarket
d) Carbon fiber 3/4 blocker rings
e) Cobra tapered roller pocket bearing
f) Motorsport M-7003-X
g) Motorsport M-7003-Z

 

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