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SCS Gearbox Quick Change Drop Style 4x4 Transfer Case
Usually Ships in 1 to 2 Weeks
Select Gearbox Model
12.66" Drop Aluminum Case
12.66" Drop Magnesium Case [+$195.00]
23.33" Ultimate Drop Aluminum Case [+$1,695.00]
23.33" Ultimate Drop Magnesium Case [+$1,895.00]
- Magnesium case is 15-20 pounds lighter.
(33/33) 1.000:1 Lower Gear Ratio
(25/41) 1.640:1 Lower Gear Ratio
(19/46) 2.421:1 Lower Gear Ratio
(17/48) 2.824:1 Lower Gear Ratio
- Call for Ultimate drop case ratios.
Select Gearbox Options
Add Front Shaft Disconnect (2WD) [+$785.00]
Upgrade to Helical Cut Gears [+$95.00]
Add Reverse Rotation Adapter [+$1,100.00]
- Counter Rotation Adapter Adds 5.34" to Drop Height
Select Quick-Change Gear Ratio
(32/32) Standard 1:1 Gears
(31/32) 1.032:1 High / 0.969:1 Low
(31/33) 1.065:1 High / 0.939:1 Low
(30/33) 1.100:1 High / 0.909:1 Low
(30/34) 1.133:1 High / 0.882:1 Low
(29/34) 1.172:1 High / 0.853:1 Low
(29/35) 1.207:1 High / 0.829:1 Low
(28/35) 1.250:1 High / 0.800:1 Low
(28/36) 1.286:1 High / 0.778:1 Low
(27/36) 1.333:1 High / 0.750:1 Low
(27/37) 1.370:1 High / 0.730:1 Low
(26/37) 1.420:1 High / 0.703:1 Low
(26/38) 1.462:1 High / 0.684:1 Low
(25/38) 1.520:1 High / 0.658:1 Low
(25/39) 1.560:1 High / 0.641:1 Low
(24/39) 1.625:1 High / 0.615:1 Low
(24/40) 1.667:1 High / 0.600:1 Low
Other / Unknown / TBD
Output Ratio = Lower Gear Ratio x Quick Change Gear Ratio
- Additional quick-change gear sets available separately.
- Gear sets can be installed as either high or low ratio.
Input and Output Flanges
No Input Flange
1350 U-Joint Input Flange [+$95.00]
1410 U-Joint Input Flange [+$95.00]
1480 U-Joint Input Flange (2.5 Ton) [+$120.00]
1550 U-Joint Input Flange (5 Ton) [+$185.00]
Turbo 350, 400, Power Glide Coupler [+$125.00]
Turbo 350, 400 (Male & Female) [+$300.00]
2.5" Female Input Coupler [+$185.00]
Other / TBD
No Output Flanges
1350 U-Joint Output Flanges (Pair) [+$190.00]
1410 U-Joint Output Flanges (Pair) [+$190.00]
1480 U-Joint 2 Ton Output Flanges (Pair) [+$240.00]
1550 U-Joint 5 Ton Output Flanges (Pair) [+$370.00]
Other / TBD
- Custom input and output flanges available, contact us for details
SCS Gearbox Quick Change 4x4 Transfer Cases
are engineered, machined, and built to handle the most severe off-road racing abuse with ease and have had no gearing or shaft failures in over 15 years. Their aluminum or lightweight magnesium cases are precision machined for maximum strength and feature a quick change upper section for fast and easy gear changes. While they are built to handle high horsepower monster trucks, mud trucks, and sled pullers, they work just as well in large rock crawlers and buggies.
SCS Drop Style Transfer Cases
use two gear sets that work together to create your overall gear ratio. The pre-installed lower gear set offers a 1.30:1 overdrive ratio that can be inverted to a 4.70:1 (7.80:1 in the Ultimate Drop model) underdrive ratio. The upper quick-change gear sets are available in your choice of over 60 different ratios up to 1.677:1 or down to 0.600:1 and can also be inverted to offer high and low gearing. To calculate your overall gear ratio, simply multiply the two together or contact us for assistance. Additional lower gear sets are also available via special order.
SCS Drop Case Dimensions and Specs (PDF)
A heavy duty bolt-on front drive shaft disconnect with neutral indicator switch is available for applications where switching between 2WD and 4x4 is needed. Additionally, a bolt-on counter rotation adapter is also available for rear engine vehicles. This unique modular all-gear design, combined with over 60 different quick change gear sets makes the SCS Quick Change Drop Case the strongest and most versatile off-road transfer case on the market today.
A very common automotive U-Joint for OE applications.
Used in many modern OE cars and SUV applications.
Medium size OE trucks and a popular performance upgrade.
Standard equipment on most 3/4 and 1 ton trucks.
2.5Ton OE military axle joint (not shown)
5Ton OE military axle joint (not shown)
SCS Gearbox images are ©Copyright SCS Gearbox, Inc., used with permission.
Additional images and product description are ©Copyright Filthy Motorsports, LLC.
Aluminum or Magnesium Case
1.75"-10 Spline input and Output Shafts
1.3 Overdrive / 4.7 Underdrive Lower Gears
Quick Change Style Upper Gearing
Optional Rear Engine Case
Available 2WD Disconnect
Made in the USA
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