The short answer is yes! This question comes up fairly often so I’m repeating a previous post for the newer folks. Also, the T-84 was used in the Studebaker Weasel.
The T-84 was not just used in the WW2 jeep. The jeep used the T-84J. Below are listed several (but not all) of the various vehicles that used a T-84. I didn’t bother to list them but there was at least one car, a Studebaker, that used a T-84 after the war.
Information extracted from The Hollander.
T-84A-1, 1A and T84B-1A
Continental Late ‘32-33 Flyer
Graham 36 80 Crusader
T84-1
Continental ‘32 Beacon, Early Flyer
T-84C-1
Mack ‘37-40 2M4A
Reo Truck ‘36-39 4-75, 3/4 ton
T84D-16
Willys ‘38-39 Pass.
Willys ‘39 Overland
T-84E-16
Bantam ‘38-40
T-84F-1
Stude ‘39-40 Champion (over drive)
T-84G-16
Nash ‘41-42 40
AS1 T-84J
Am Bantam (Jeep) 40 BRC 1/4T 4×4
AS1 T-84J
Willys 41-45 Army 1/4T
AS2 T-84J
Ford Jeep ‘42-45 GPW 1/4 T 4×4
T84H-1
Bantam 41-42
The T-84 gets a rap for being a bad and weak transmission. You have to wonder why it was used in some many cars (and trucks!) for so long a period of time, if better transmissions were available.
For more about the T-84 WW2 jeep transmission, check out my book – Trouble Shooting And Rebuilding The T-84J. You really can rebuild a WW2 jeep transmission.