BorgWarner T-5 transmission explained

T-5
Classification:manual transmission
Application:longitudinal engine automobiles
Weight: dry
Free Label:Input torque
Free Text: max

The BorgWarner T-5 is a 5-speed manual transmission for longitudinal engine automobiles. It includes one overdrive gear, a lightweight aluminum housing, and adaptability for four wheel drive use.

It is currently manufactured by TREMEC.

History and design

The T-5 was originally designed by BorgWarner based on the T-4 and earlier SR4, and was sold as the BorgWarner T-5 until the design was sold to TTC (aka Tremec) in the late 1990s.[1] The SR4 was a light-duty 4-speed manual that used ball and needle bearings on the countershaft with bronze synchronizer rings. The T4 improved this design with tapered roller bearings on the input and output shafts and a straight roller bearing on the counter gear. The T-5 is a T4 with an added overdrive gear.[2] The T-5 carries a part number of 1352-000-xxx, where xxx is a three-digit application-specific number ranging from 001 to 260 that also can be used to distinguish World Class from Standard T-5 transmissions.

The first T-5s were installed in the AMC Spirit/Concord. In 1982, GM began fitting the T-5 to the S-10/S-15 compact pickup trucks; then in 1983, both Ford (Mustang) and GM (Camaro/Firebird) picked up the T-5 for their pony cars.[3]

The T-5 has become a popular restomod option for older and classic manual transmission cars, as the overdrive gear can improve fuel economy.[4] In general, retrofitting the T-5 is straightforward for many rear-drive Fords from the 1960s and 1970s, as they are dimensionally compatible.[5]

Models

Differences between World Class and Standard transmissions! Feature !! WC !! STD
Bearings under gearsJournal
Blocker ringsFiber-lined steel Brass
Countershaft bearingsStraight roller
The T-5 is available in "World Class" (WC) and "Standard" (STD) models; STD are sometimes known as Non-World Class (NWC). Compared to the Standard, the WC changes bearing types and blocker ring materials.[6] Externally, the tapered roller bearing race for the countershaft at the front of the WC, facing the clutch and below the input shaft, can be distinguished from the corresponding straight roller bearing cup of the STD.[1] If this is not visually accessible, the color of the synchronizer rings can be used to distinguish the two types, with the oil fill plug removed.[2] WC transmissions should be filled with automatic transmission fluid, while STD models use 50W gear oil.[1]

STD transmissions are rated at up to of input torque with a 2.95:1 first gear. Most STD transmissions have a first gear of 3.75 to 4.10:1 for smaller-displacement engines; these so-called 4-cylinder T-5s are rated up to of input torque.[3]

WC transmissions initially carried the same maximum input torque rating of until hardened first gears were introduced in approximately 1990, raising the rating to . Typical first gear ratios for the WC ranged from 3.35 to 3.97:1; the Ford Mustang SVO had a unique 3.50:1 first gear for 1986.[3]

Applications

External links

Notes and References

  1. News: Everything You Ever Wanted To Know About The T-5 Five-Speed . Smart, Jim . June 22, 2015 . Motor Trend . 12 October 2022.
  2. Web site: HOW TO: Identify your T5 is a World class or Non-World class version . Modern Driveline . 12 October 2022.
  3. Web site: The many different faces of the T5 . Modern Driveline . 9 August 2019 . 12 October 2022.
  4. Web site: T-5 Transmission swaps . O'Clair, Jim . September 23, 2018 . Hemmings . 12 October 2022.
  5. Web site: T5 Swaps for Early Fords . September 2000 . Ford Muscle . 12 October 2022.
  6. Web site: Tremec T-5 Service Manual, Bulletin number TRSM-T5-0510 . Tremec Corporation . 12 October 2022.