Differential Pinion Shaft
PowerTrax pinion shafts are made with Zytanium, an aerospace grade steel that is processed to proprietary specifications. Zytanium shafts are typically 50% stronger than original differential components and up to 65% stronger than titanium.

CS1940 Application Notes
- For Aftermarket Powertrax Units
- Differential Pinion Shaft For 1940-LR
Warranty
1 Year or 50,000 Miles
CS1940 Specifications
Diameter
18.6 (Millimeter)
Grade Type
Performance
Length
121.3 (Millimeter)
Material
9310 Steel
Part Number Superseded To
3991065REO
Prop 65 Long Label
WARNING: Reproductive Harm - www.p65warnings.ca.gov
Prop 65 Short Label
WARNING: Cancer - www.p65warnings.ca.gov
Prop 65 Y N
N
Taxonomy A
LD Differential, LD Differential, LD Differential, LD Differential
Taxonomy B
Cross Shafts & Pins, Cross Shafts & Pins, Internal Gear Kits & Components
Taxonomy C
Cross Pins/Cross Shafts
Type
Open
Used In Lock Right Units
1940-LR, 1940-LR
Vehicle Applications
- 1964 – 1970 Buick Wildcat
- 1964 – 1972 Chevrolet Bel Air
- 1964 – 1972 Chevrolet Biscayne
- 1969 – 1972 Chevrolet Brookwood
- 1967 – 1970 Chevrolet Camaro
- 1966 – 1971 Chevrolet Caprice
- 1964 – 1972 Chevrolet Chevelle
- 1964 – 1968 Chevrolet Chevy II
- 1964 – 1972 Chevrolet El Camino
- 1964 – 1972 Chevrolet Impala
- 1964 – 1967 Chevrolet Malibu
- 1970 – 1972 Chevrolet Monte Carlo
- 1969 – 1972 Chevrolet Nova
- 1971 – 1972 GMC Sprint
- 1972 Pontiac Bristol
- 1969 – 1972 Pontiac Firebird
- 1970 – 1972 Pontiac GTO
- 1964 – 1970 Pontiac Tempest
- 1971 Pontiac Ventura