Mystery O-Rings in ZF-5 Rebuild Kit?

[bulletpruf]

Anyone know what these o-rings are for? They came with my gasket/rebuild kit. I'm finishing up a rebuild on a S-47 4x4, and I don't recall seeing these on the disassembly.

Looks like the two thin ones are for the shifter, but not sure on the other 3.

Thanks

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[Rdnck84_03]

I have done 3 zf5's and I don't remember seeing o-rings in anything.

James

 

[bulletpruf]

Yeah, that's what I'm thinking. I called the company who sold me the kit. Spoke with a tech who couldn't tell me where they came from, either.

 

[Rdnck84_03]

They must have had a new guy packing that kit.
Hopefully everything your supposed to get is there and correct.

James

 

[u2slow]

Does a 2wd possibly need more o-rings than a 4wd? (Speedo or yoke?)

 

[Rdnck84_03]

Do any of the zf's use an o-ring seal on the drain and fill plugs? I don't remember them using one but those 2 thin ones look about the right size.

James

 

[hacked89]

drain plug has o ring

 

[Rdnck84_03]

Ok so the drain and fill plugs would be where those two same size ones go.

I don't think there is any in the 2wd tail housing either, but it has been a couple years since I have had one apart.

James

 

[bulletpruf]

My drain and fill plugs have metal washers that have a rubber inner section, but earlier ones may not have had that same setup.

 

[hacked89]

My drain and fill plugs have metal washers that have a rubber inner section, but earlier ones may not have had that same setup.

Maybe. One of my ZFs had a slight drip from the drain. I pulled it and was like ya it’s definitely missing an oring where it looks like it should be. Pulled the fill plug and yep same oring as your pic.

 

[Austin86250]

Does a 2wd possibly need more o-rings than a 4wd? (Speedo or yoke?)

Speedo cable o ring is very small looks like injector return o ring
2wd zf5 output yoke uses a seal like the pinion in the diff

Do any of the zf's use an o-ring seal on the drain and fill plugs?

From the zf5 that I’ve worked with they are just tapered threads no washer or o ring

It’s probably just a case of random extra parts one time I bought a reseal kit for my 6.9 and it came with so many random things that didn’t go to an idi so I wouldn’t worry about them

 

[bulletpruf]

Thanks for all the input. It's back together now.