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Gary Barnes now offers two complete rear end gearboxes. The gearboxes come fully assembled, and all parts are in stock. By using CNC technology, we now produce the finest gearbox case from billet aluminum. Unlike the sand cast or investment cast gear cases, the K&G case is stronger and the machined areas are held to exact tolerances.

The Standard Gearbox

The input shaft on the standard gearbox has two bearings, side by side. Axle bearings are held in place with snap rings as well as the pinion bearings. The axle is made of 3/8 inch diameter stock on a CNC lathe. Hardened steel beveled gears are used with a 2:1 ratio. Both the ring and pinion gears are locked to the axle by two set screws. Axle is machined for a 1/8 inch woodruff key. Ring gear is also broached.

Standard Gearbox Parts List

SGB015	Standard Gearbox Fully Assembled $265.00
SGB001	Standard Gearbox Case $90.00
SGB002	Input Shaft $20.00
SGB003	Drive Axle 3/8 Dia., 1/4 x 28 ends 10 degree taper $30.00
SGB004	1 Set 2:1 Ratio Hardened Steel gears with carrier $75.00
SGB005	1 Set of bearings (4) $24.00
SGB006	Gear Carrier $20.00
SGB007	1 Set Axle collar $12.00
SGB008	1 Set Rear drive wheels with screws $50.00
SGB009	1 Set Bearing snap rings (3) $1.50
SGB010	1 Set Axle nuts (2) $1.00
SGB011	Gearbox Cover plate $10.00
SGB012	1 Set of shims (6) $1.00
SGB013	Steel Flywheel $26.00
SGB014	OS Max taper flywheel collet $10.00

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The Hot Rod Gearbox

The Hot Rod Series gearbox is wider than the standard gearbox. The reason is so no machining of the hardened steel gears is necessary. The axle diameter is 1/2 inch, with a 10 degree taper by 1/4 inch on each end. 1/4-28 nuts hold the inner wheel hub with a 10 degree matching taper to the axle. The ring gear is locked to the axle with a 1/8 inch Woodruff key and two 1/4-20 set screws set 90 degrees apart. The gear tightens down on the key and a machined flat spot on the axle. The pinion gear is locked to the input shaft with two set screws. The drive arrangement between the engine and the gearbox is the same as the standard gearbox. As with the standard gearbox a flywheel and tapered collet can be provided at an additional charge.

Hot Rod Gearbox Parts List

HGB015	Hot Rod Gearbox Fully Assembled $275.00
HGB001	Hot Rod Gearbox Case $110.00
SGB002	Input Shaft $20.00
HGB002	1/2 Dia. Axle w/ 10 degree tapered ends $35.00
HGB003	1 Set inner wheel hubs w/10 degree taper $25.00
HGB004	1 Set of axle bearings (2) $16.00
HGB005	1 Set Input shaft bearings (2) $12.00
HGB006	1 Set Bearing snap rings (3) $1.50
HGB007	1 Set Axle snap rings $0.75
HGB008	1 Set Axle Lock collars (2) $12.00
HGB009	1/4-28 Axle nuts (2) $1.00
HGB010	1 Set Hardened steel gears 2:1 ratio $75.00
HGB011	Woodruff Key $0.50
HGB012	1 set outer wheel hubs (2) $25.00
HGB013	1 Gearbox Cover Plate $12.00
SGB012	1 Set Shims (6) $1.00
SGB013	Steel Flywheel $26.00
HGB014	OS Max taper flywheel collet $10.00