TATA 1613 Turbo — “One Side Thick, One Side Thin” — What It Means
In the context of Tata 1613 Turbo (a diesel commercial truck model), the phrase “one side thick, one side thin” refers to the driveshaft/steering universal joint yoke or spline type used at one end of a component such as a steering joint or propeller shaft joint:
🔹 “One side thick spline & one side thin spline” is used to describe a steering joint/shaft yoke assembly where the two ends of the joint have different spline profiles — one end has thicker splines and the other end has thinner splines to match the different mating parts on that vehicle’s steering or driveline system.
🛞 What Component This Usually Refers To
This specification commonly applies to the STEERING CROSS/JOINT ASSEMBLY or related intermediate shaft parts on Tata heavy‑duty trucks like the 1613 Turbo, where the linkage connects:
A steering gearbox or drag link on one side, and
A steering arm/u‑joint on the other side
with different spline sizes at each connection.
So “one side thick, one side thin” means:
One end of the steering joint or shaft has a thicker spline profile (larger spline thickness) and
The other end has a thinner spline profile (smaller spline thickness)
to match the mating shafts/parts they connect to.
🚛 Where This Is Used
According to spare parts listings for heavy Tata trucks:
Tata 1613 and Turbo 2616 steering joint parts are listed with one thick and one thin spline configuration, indicating that the part bridges two different spline specifications in the steering assembly.
This is especially relevant when ordering replacement steering joints or universal joint assemblies for the 1613’s steering column and linkage — the two different spline types ensure correct matching with both steering gearbox and steering shaft ends.