Two-Speed Transfer Case

BASE two-speed transfer case outperforms its competitors considering optimized and modern shell design, modular gear set structure and lightness driven by aluminum housing.

Two-speed transfer case offers remote and direct mount for transmission families.

Thanks to modularity concept followed by BASE Engineering and Company’s flexible business model, different ratios can be provided in a basic housing.

Proven in harshest field conditions, BASE two-speed transfer case has been widely used in key vehicles of reputable vehicle manufacturers. (e.g. BMC, Katmerciler, InterArmored)

 
Product Name TKB-330A TKB-420A TKA-420A TKA-423A TKA-535A
Drop Distance 330 mm 420 mm 420 mm 423 mm 535 mm
Max Input Torque 5,000 Nm 10,000 Nm 10,000 Nm 32,000 Nm 20,000 Nm
Max Input Speed 4,000 rpm 4,000 rpm 4,000 rpm 3,500 rpm 3,800 rpm
Gear Low Ratio 2.8:1 0.94 – 1.05:1 or 1.19:1 0.94 – 1.05:1 or 1.19:1 1.05 – 1.15:1 or 1.22:1 1.16:1
Gear High Ratio 5.85:1 1.92 – 2.19:1 or 2.34:1 1.92 – 2.19:1 or 2.34: 1.92:1 2.55:1
Speed Shifting &
Interaxle Differential Lock
Pneumatically Actuated
Indicator Switches,
%50-%50
Torque Distribution,
Capable for
manual shifting to
neutral mode
Pneumatically Actuated
Indicator Switches,
%50-%50
Torque Distribution
Pneumatically Actuated
Indicator Switches,
%50-%50
Torque Distribution
Pneumatically Actuated
Indicator Switches,
%50-%50
Torque Distribution
Pneumatically Actuated
Indicator Switches,
%50-%50
Torque Distribution
Output Flanges Standard XS120
ISO 8667
Standard XS150
ISO 8667
Standard XS150
ISO 8667
Standard XS180
ISO 8667
Standard 8.5C
Input Flanges Direct Mount
on Allison 1000
Series Transmission
Remote (XS150) & Direct Mount
on Allison 3200SP
Series Transmission
Remote (XS150) & Direct Mount
on Allison 3200SP
Series Transmission
Remote (XS150) & Direct Mount
on Allison 4000-4800
Series Transmission
Remote (8.5C) & Direct Mount
on Allison 4000-4500
Series Transmission
Parking Brake Double FSG 90
(Ø 260×12.7)
Double FSG 90
(Ø 340×12.7)
Optional
Double FSG 90
(Ø 340×12.7)
Optional
Double FSG 90
(Ø 340×12.7)
Double FSG 110
(Ø 340×12.7)