Eaton Posi sources and info

[JointTech]

whos the forum vendor for these things?
I have a 14bolt FF with 4.?? gears.

I want to go to 3.42 gears and an eaton posi.

Im trying to figure out what I need.

I see ring and pinion sets, and I see the posi unit.

what type install kit or other bearings, shims, seals do I need?

[Bigdav160]

Bearing and seals are easily available individually. No need for a "kit"

The side bearings are on threaded adjusters - no shims.

[whitedog76]

When you say "Eaton Posi" I'm going to assume that you mean the gearless type, like a lock-rite.

It basically takes the place of your spider gears. No need for bearings or re adjusting.

Pull axle shafts out, pull center pin, remove spider gears, insert posi, re-install center pin, slide shafts back in, apply silicone, bolt everything back together, fill with gear oil, drive.

Note- If you have a 4.56 or higher geared rearend, you may not be able to use the gearless style without swapping to the 4.11 and down carrier.

[JointTech]

im talking about one of these. http://www.jegs.com/i/Eaton/362/1968...oductId=750876

If I plan on changing the gear ratio I have to change the ring and pinion gears. The ring gear looks like it bolts to the side of that eaton thing. But the pinion looks like it might need some bearings?

when researching rear ends, I see a lot of talk about crush washers, and backlash and yellow paint etc. how do I know what I need.

if its not obvious I haven't ever taken apart a rear end. Im willing to get dirty though

Im planning on going from my current 4.11 to a 3.42 gear.

[whitedog76]

You have a tall order for info. I hope this helps.

Looks like you're going to basically need a complete rebuild kit.

http://www.pirate4x4.com/tech/billav...4b_Gear_Setup/

[JointTech]

perfect. ive been through the 14bolt bible a few times but missed that page.

[TJ's Chevy]

We bought an eaton posi for my 77 C-20 14 bolt off of ebay. Got the bearings and seals from Napa and new axles from Ebay as well. Gear ratio is 4.10. Make sure your axle is either a 28 or 30 spline. The one in my 77 is a 30 spline. I believe the different sizes were 28,30,32..maybe even 29. But makes sure you check that before you order a ton of parts.