Help! What ratio are my k10 axles?

[AlexK10]

Pop the cover. Don't be lazy. Or, be lazy and let everyone speculate. A tube of silicone is like $7. If you're cheap, reuse the oil. Don't be lazy.

I already have the rtv, so 7$ less. And last time I had the covers out I welded drain bungs, how easier can it be.

Yeah its basically new gear oil with less than 50 miles on it for both front and back diffs; because I've been working on the engine and trans, which are done now and that's why I'm paying attention to the diff.

I hope we convinced the OP to count the teeth.

Ok I've wasted everyone's time by being lazy... I thought I would get a definite answer but in reality the only way to make sure and not buy the incorrect ring pinion set would be to POP THE COVER!

Have some other stuff in the pipeline that goes before this, like install a horn and get the wipers working again. Therefore this will have to wait a few more weeks.

 

[Craig 85]

In case you didn't know here's how to read the ring once the cover is off. This is for a '70 Chevelle.

Part #: GM 3862526
Gear ratio: 10 41 = 4.10 (FYI 11 41 would be a 3.73)
Date of Manf: 3 70 = 03/1970

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[The88]

Could always buy 2 sets of 4.10s then no need to count anything.

 

[The88]

Damn double

 

[AlexK10]

Will get to this later than sooner since I have house projects to tackle for the next months.

However, I know how to go about this now, POP THE COVER! When I get back to this Ill post again and give updates.

Been thinking that if my gears are good... All I may need are seals, bearings and a crush sleeve eliminator to get the clearance correct to get rid of the clunk when I shift to reverse or drive.

I only drive this truck a few miles on the weekend, less than 20 miles per week, so slight wear on the gears may be acceptable for a beat up rusty truck. Its not a daily driver, not a show truck, just a truck I use to carry stuff and eventually will use to launch a 16-17' lumberyard skiff.

 

[80BrownK10]

Default gear could be that 2.76 with a 3 speed. I hope we convinced the OP to count the teeth. He needs to match the front axle. Probably not a 2.76 with a 700R4, final drive would be under 2.

Or unless someone swapped the axles over the years. Maybe the rear is an original 2.76bor whatever and they left the front an original 3.08?

 

[Rusty Nail]

For the front axle...
I did the same procedure with the manual hub locks engaged in the "lock"position.
The axle didn't complete 3 turns with 2 turns of the wheel.
Whats going on with the front?

You gotta jack up the opposite side dude...the axle is turned around.

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[AlexK10]

You gotta jack up the opposite side dude...the axle is turned around.

So for the rear I did leave one tire on the ground being an open diff but for the front I need to raise both sides?

 

[Rusty Nail]

You just gotta jack up the other side. The driver tire is the front drive wheel. The passenger front is the spinning wheel.

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