Borg-Warner T84

The Borg-Warner T84 was a transmission used in military Willys MB and Ford GPW in WWII.

The T84 transmission assembly is a three-speed, selective sliding gear-type, with synchromesh second and thirds speed gears. This transmission is sealed for underwater operation.

Gear Ratios

Reverse	3.55
1st Gear	2.67
2nd Gear	1.56
3rd Gear	1.00

Fluid Type and Capacity

Lubricant	SAE 90W
Capacity	1 qt

Avoid GL-5 lubricant, which can cause increased wear on the brass synchros found in this transmission

Other Specifications

Weight
Length
Input Splines	10
Output Splines	6
Pilot Tip Width

Transfer Case Compatibility

Engine/Bellhousing Compatibility

Write-ups and Tutorials

Parts and Fluids

Engine Fluids

Engine	Fluid Type	Capacity
AMC 2.5L I4	Above 0°F: 10W-30 Below 60°F: 5W-30	4.0 qts
AMC 4.0L I6	Above 0°F: 10W-30 Below 32°F: 5W-30	6.0 qts
GM 2.5L I4	Above 0°F: 10W-30 Below 0°F: 5W-30	3.0 qts
Renault 2.1L	tbd	tbd
VM Motori 2.5L	tbd	tbd

Transmission Fluids

Transmission	Fluid Type	Capacity
Chrysler A904 3-Speed
Aisin-Warner AW-4 4-Speed
Chrysler 30RH 3-Speed
Borg-Warner T-4 4-Speed	ATF Dexron II	1.75qts
Aisin-Warner AX4 4-Speed	75W-90 GL3 or GL4 10W-30 Motor Oil	2WD: 3.7qts 4WD: 3.5qts
Borg-Warner T-5 5-Speed	ATF Dexron II	1.75qts
Aisin-Warner AX5 5-Speed	75W-90 GL3 or GL4 10W-30 Motor Oil	2WD: 3.7qts 4WD: 3.5qts
Peugeot BA-10/5 5-Speed
Aisin-Warner AX15 5-Speed	75W-90 GL3 or GL4 10W-30 Motor Oil	2WD: 3.32qts 4WD: 3.27qts
New Venture Gear NV3550 5-Speed	Mopar MT Fluid SAE 30W Oil	3.3qts

Axle Fluids

Axle	Fluid Type	Capacity
Dana 30	75W-90 75W-140 (towing)	1.26qts
Dana 35	75W-90 75W-140 (towing)	1.75qts
Dana 44	75W-90 75W-140 (towing)	2.00qts
Chrysler 8.25	75W-90 75W-140 (towing)	2.11qts

Transfer Case Fluids

Transfer Case	Fluid Type	Capacity
NP207
NP228/229
NP231
NP242

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