American Motors, Hummer, Jeep (4WD/RWD) Differential Spool - USA Standard Gear - ZP FSM20-3-29

Spool
ZP FSM20-3-29
,&,29spl,3.08,M20,SPOOL,UP,ZP,
06-68 JEP/AMM/HUM
USA standard steel spool for Model 20 with 29 spline axles, 3.08 & up
M20 3.08 & UP 29spl SPOOL
USA Standard steel spool for Model 20 with 29 spline axles, 3.08 & up
Installing a quality USA Standard Gear spool is a cost-effective way to get 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each USA Standard Gear spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outstanding choice for dedicated off-road and drag racing vehicles only.
Fits AMC Model 20
3.08 and up ratio only
Provides 100% traction to both wheels at all times
Not recommended for street driven vehicles