How to Replace a Rear Differential Pinion Seal - GM 10 Bolt 1979 Pontiac Trans Am

[@toddosbornejr]

This video just helped me fix my 70 Monte Carlo. Thanks!

[@dhammiam]

Awesome, good job 👏 I’m happy to help 👍

[@donyboy73]

Great video, you're a great mechanic!

[@dhammiam]

@@donyboy73 thank you 😊 I’ve been in the business for quite a while now

[@CincoDave27]

You sure saved me some time with this description. Thanks for posting!

[@dhammiam]

That’s great to hear, thank you. I’m glad I could help

[@m.scottmunger4685]

Thanks. Not as bad as I thought. The repair that is. Great video.

[@dhammiam]

I’m glad to hear that, thank you 👍

[@seanjmichel]

going to attempt this next week, hope I get this seal in straight

[@goodbonezz1289]

How’d it go?

[@seanjmichel]

@@goodbonezz1289 it went well. Still holding up today

[@eliasmaximus4857]

Right on!

[@dhammiam]

Yea buddy 👍

[@rc4728]

Excellent tutorial!

[@dhammiam]

Thank you. I appreciate that

[@DavidSchut]

Well done video

[@dhammiam]

Thank you. I try to be straight to the point and quick repair as to not waste anyone’s time.

[@eliasmaximus4857]

I just did this, and marked the threads with a white marker, but looks like I cleaned the markings off in between when I took off the nut or was cleaning off things. I think I aligned right, with the existing mark, but don’t know how many threads should be showing exactly. I was wondering how many threads you had showing with the nut? It may not be a right way to gauge mine, but was just wondering. What rear end gear ration are you running?

[@dhammiam]

I don’t remember what gear was in it. I’m thinking the threads may show in the video. I marked mine with a chisel as well to be safe. Hopefully yours will be fine. This was on a 79 Silver Anniversary Trans Am

[@wmdbowman]

doe great work!!

[@dhammiam]

Thank you!!

[@Khaled-tx5xj]

Does a pinion seal leak cause the seeping of oil to the axle tubes ?

[@dhammiam]

No it shouldn’t. There are axle seals at the end of the axle tubes to keep oil from getting into the brakes

[@mikewilkes7831]

Ty need to do this on my 73 lemans

[@mikewilkes7831]

What kind of fluid goes in rear

[@michaelbox7285]

So no preload tension or new crush sleeve?

[@dhammiam]

Didn’t need it. That would be a different video

[@gtuttle4]

Unfortunately my DeWalt 1/2" impact wrench would not loosen the pinion nut!

[@user-jq1iq4kg8l]

Can you identify the pinion seal that you recommend? I have the same car.

[@dhammiam]

This pinion seal came from O'Reilly's and I believe is a Master Pro. National brand is more expensive or if you're having issues Napa typically has the best quality parts. Make sure there's not a ridge worn on the yolk and also to drive it in straight without bending it at all. Shouldn't need silicone but if you feel like you fo just put a tiny amount around the outer edge of the seal or housing as to not get any in the bearing. Thanks

[@user-jq1iq4kg8l]

@@dhammiam thank you Sir! Great video. Take care

[@dhammiam]

Thank you. Take care and comment or ask questions anytime 👍

[@321homewrecker]

I even made a custom piece to install it and still nothing, guess Imma have to get a while new differential.

[@dhammiam]

It's important to get lined up perfectly before hammering in. I wish they'd make the seals with more of a lead in edge to make easier to start straight

[@321homewrecker]

@@dhammiam I used a #3896 seal & the # national 2043 for my 92 c1500 and neither will go flush? I don't know? Seems that it just will not go in further because both stop perfectly even leaving a gap .

[@couchrider6228]

@@dhammiam That may not be the correct seal for your truck. GM changed up the diff. Seals a lot in those years . Lots of variables. May be GM part #26064029 this fits “97” k1500 pickup.

[@Dougarrowhead]

What is the milage on that car?

[@dhammiam]

I believe it's 28k miles

[@bryantracing3022]

I was told if u change seal change crush sleve to but my buddy said he's never changed crush sleve

[@32goingon17]

I can barely move it, I'm on the end of a 24" breaker bar. This is going to take a while.

[@dhammiam]

@@32goingon17 I hate when that happens. I usually grab my best 1/2” impact and 6 point impact socket bust it off. May have to heat the nut with a torch

[@herbertwicks581]

Or you could use a piece of PVC pipe as a seal driver. Do not grease the yoke as most seals today are installed dry

[@couchrider6228]

That’s the same seal that I had to put in my 97 Tahoe . GM discontinued the seal so I used a Timkin 2043 . Got it from Summitt Racing.

[@321homewrecker]

Man I got the and set up on my c1500 and I cannot get my seal to go in flush. Damm why is it so difficult???

[@dhammiam]

It's a bad feeling when you drive one in and see it's not centered or straight. Needs to be redesigned but it's been that way forever

[@goodbonezz1289]

How’d things end up…ever get the seal in flush?

[@321homewrecker]

@goodbonezz1289 no, trucks been sitting up for over a year now and I don't have friends or family and many times when I KZbin to fix things myself, I end up messing up and completely setting myself back further.

[@goodbonezz1289]

@@321homewrecker I know how frustrating that can be. Don’t give up. Maybe put aside some money to purchase one of those tools he used…or you might be able to rent one from a parts store. I’m solo as well.

[@321homewrecker]

@goodbonezz1289 recently got flooded here where I stay and got kicked back to the stone age. Don't see myself going anywhere for the next few years, literally below ground zero right now. Damn government and their weather weapons. Same happened in the east coast but I'm here in Texas, worst flood since 2000