When keeping 4x4 we need to change gear ratios for the below listed vehicles while keepingit 4 speeds:
Subaru Brat
86 Ford F150
GMC Typhoon
GMC Cyclone
GMC K5 Jimmy
Nissan Patrol
International Scout
Toyota J40
Toyota Tacoma
Toyota 4runner
Some of the best trucks in the game and blast to drive in freeroam are available with this option like the Chevy K10, 75 Ford Bronco, Jeep CJ5 Renegade and others.
The benefits of adding the drift 4spd transmission exceeds the purpose of drifting. Its lighter weight and shifts faster between gears. It also keep authenticity while opening the possibility to fine-tuning ratio of all gears.
When swapping high torque engines we dont need the six speeds. Lower number of shifts save shift time and make better acceleration.