[69nomad350]

So I just replaced my axles bearings and rear brakes..I don't think that's relevant but worth mentioning. I also then paid someone to replace my pinion seal because once I fixed the axle seal it was leaking like a siiv at the pinion seal.

Now there are a few drops of oil under the car right under the pinion nut after i drive it and then park it back in the garage.

Pinion nut not tight enough? he said he didn't replace the crush washer. could it just be that? planning on taking it back to the shop unless I can do something myself here.

 

[Kopfjaeger]

Sealant needs to have been applied to the pinion shaft splines before the yoke was installed or it will leak.

Joe

 

[69nomad350]

that makes sense. so guy at the shop probably messed up and this shouldn't cost me more money

 

[427L88]

Oh he defintely missed!

 

[71350SS]

Without the sealant on the splines the gear oil seaps out and there's your leak.But how much is it leaking ? if the guy doing the repair was ham fisted he could have knocked the spring out of the seal when he installed it.That would cause a bigger leak right away.

 

[69nomad350]

it's a minor drip spot under the car. rear end is still full but it leaves a good tablespoon or so after the couple.cruises I've taken after this was done

 

[DZAUTO]

I'm not getting into this one----------------------I'll offend someone.

 

[69nomad350]

I'm not getting into this one----------------------I'll offend someone.

lol now you gotta say something

 

[big gear head]

Do not put sealant on the splines of the pinion shaft. Only put sealant in the splines in the yoke. If you put it on the pinion shaft the yoke will push it into the outer pinion bearing. If you put it in the splines in the yoke then it just gets pushed out toward the pinion nut where it doesn't do any damage.

 

[DZAUTO]

THANKS Freddie!

 

[69nomad350]

that makes sense. hopefully this shop will fix it for me on their mistake. they seem honest. owner has a 57 Bel air.

 

[Lew540]

Wasn't there also something about pinion seals and certain ones were too deep and they ride on the end of the seal and you need to make a .060 spacer when putting it in on some seals today. I know there are 2 or 3 seal types for a 12 bolt and I ordered 2 of them to see and yes they have different seal depths. I think there is a video from a shop on this out there.

 

[72soft-top]

Here’s the Hagerty video with the truck seal

DIY: How to install Positraction and give your muscle car tire-frying capability

No more one-tire fires.

www.hagerty.com

 

[71350SS]

^^^ if anyone's interested he starts the seal install about 42:00 or thereabouts

 

[GRC1970]

When I re sealed mine I had to build a .060 shim to get it out to the right spot. Seal the time splines

 

[big gear head]

You don't actually have to make a spacer for the seal. Just don't drive it in all the way. I've never made a spacer for the seal.

 

[69nomad350]

it's a 10 bolt 69 rear end