Richmond Ring and Piñon set

[Paul Mitch]

I have a 65 C10 with a 12 bolt rear end and 373 gears and a series 3 carrier

I bought a Richmond 308 ring and pinion.
I also bought a 12 bolt timkin bearing and spacer kit.

The pinion bearing with the kit is too small. The Richmond pinion tapers to a much larger shaft size than the stock one. Is this normal?
Do Richmond pinions use a larger bearing?

Pauk

[T and S]

Depending on what ratio the new gear set is, you may have to get a new carrier also. There is a cut off point (not sure where) where the ring gear thickness changes. I would contact where you got your parts from for more info.

[jayoldschool]

That pinion may be designed to take a solid spacer instead of a crush collar. A quick call to Richmond (or a search for info on the part number) should sort it out.

[Captainfab]

It sounds as though you may have a gear set for a car 12 bolt. The car 12 bolt has a larger pinion shaft than a truck 12 bolt. Additionally you can not install 3.08 gears onto a carrier designed for 3.73 and lower gears. You need a carrier for 3.42 and higher gears.

[vince1]

I thought 3.08 was a car ratio and 3.07 is for trucks.

[RIDE-RED 350r]

OK, series 3 carriers are for 3.42 and numerically lower gear sets. Series 4 are for 3.73 and numerically higher.

You CAN run 3.73 and numerically higher on a series 3 if you run a "thick" ring gear. The series 3 being intended for 3.42 and numerically lower mounts the ring gear further from the pinion due to the higher pinion tooth count in the numerically lower gear sets. Hence the pinion itself will be larger in dia. Gear manufacturers offer 3.73 and numerically higher gear sets with a "thick" ring gear to allow for operation with series 3 carriers. They are often designated as such.

I am running 3.73 Richmond with a "thick" ring gear on a series 3 carrier on my K-10.

You cannot run 3.42 and numerically lower on a series 4 carrier. Thin ring gears would probably not work out so well...(Which they do not offer)

And I agree with CaptainFab on everything he said, especially that it sounds like you have a kit for a car 12-bolt. Larger pinion shaft dia.... Need to get 12-bolt "truck" components.

You need a master rebuilt kit like either of these 2: http://www.ringpinion.com/b2c/PartsL...D=192&CatID=27

And a gear set such as this that is specified with a "thick" ring gear: http://www.ringpinion.com/b2c/Produc...nd_Pinion_Sets

[RIDE-RED 350r]

OK, I misread your initial post. You will be fine with the 3.08 gears on the series 3 carrier. For some reason I thought you were looking to install 3.73 on the series 3.... I completely misread. Apologies....


But still, it sounds as though you bought components for a 12-bolt car rear end.

[Paul Mitch]

Yep! Called Richmond today and I mistakenly bought a ring and piñon for a car . Ordered the truck gears today and will fit them tomorrow afternoon. Thanks.