HOW TO REPLACE ENVOY TRAILBLAZER FRONT DIFFERENTIAL INNER SHAFT SEAL 

Thanks for checking out the video. Let me know if it's helpful. I did not have to completely remove my front differential to change the inner shaft seal.

Kevin I just posted this on a stop leak channel vid.. someone was asking me about the Titan Seal. I'm not sure - I found reviews on other websites. So that's what sold me - also the concept behind it of a flexible silicone polymer (and not silicate) and also I knew that other "stop leak" products for oil didn't work so well since they actually weaken the seals by expanding the seals. Also I knew I needed to fix silicone seals and not rubber. I talked to them on the phone and email - a few times. Yeah it was definitely a risk but amazingly it worked! I only used half a bottle on my front differential. I need to bring the rest inside - not sure if it would like the winter weather. haha. I had to first take out the front diff oil - and I didn't take out enough to put in the full bottle. Turns out the leak stopped!! All I know is I have no more oil dropping down onto the garage concrete. So that's good enough for me. I suppose some of it is from getting my oil changed and the workers just don't clean off the oil well since the filter is hard to get to.... But I definitely had a leak on the front diff inner seal and it's super hard to get to on this car. The whole engine has to be - the front differential goes through the oil pan - the whole front drive train. It's a huge pain. One DIYer on youtube figured out a secret way of getting at that inner seal but I'm sure the "standard" way would be done by a typical mechanic. Unless I convinced them to do it this way that the youtuber figured out. haha. I didn't want to have to do that.

Nice job Kevin, very helpful. You boldly took chances that paid off and created a great reference for the rest of us GMT360 diehards.

Excellent! Just what I needed to know, have this to do on '04 TB. A+++

This video is gold man. Thank you!

I sold my 2wd Rainier a year+ ago, but I like to watch your videos to see how many miles you get from yours. I am rooting on 500,000 miles for your Envoy. Good luck.

Absolutely awesome. Thanks for the tip

Excellent video! I was dreading having to do this, your method is far less intimidating.

Thank you! Was very helpful!

wow so cool, i was dreading this job so much, i was going to try this way, now i know it will work ,thank so much for this video.

Hi Kevin great vídeo I made the same job thanks again.

I had to put 4wd bearing plate in my other trailblazer and the hub snapped flush with the pan! What a nightmare!!! Had to air chisel that sucker out ! As far as the half shaft goes the passenger side is threaded so you can grab a bolt with a washer run it in and use a pry bar it pops right out well mine did it’s about the only thing that came out easy lol I need to change the driver side outside seal now .. Did you replace that one also ? Need to find a part number I usually order through Amazon just wanna make sure I get the right one … Ps nice job bro!! All the problems I had with the passenger side well it almost became a 2wd! Lol But these are great in the snow!! It’s really the only time I drive the LS one 👍🏻

I use Napa seal, fit perfectly, one you have for passager side

I probably misspoke I'm not taking the differential out just trying to rotate it down to replace the inboard seal and was hoping the intermediate shaft wouldn't be in the way but after loosening it it doesn't seem like I can slide it back into the passenger side enough to rotate the differential down.

Hey great video. I’m in the process of installing my seal. Do the the teeth on the back of the seal have to fit in the groves when installing the new seal

hi,love the videoz,have one where you change diff,got a grinding noice in front drivers seal.i took off old seal and was told by some one i gotta change whole thing,any thoughts.thx

Was wondering what seals you used for diff axle. I'm having a herd time finding them. I have 04 chevy tb ext

My new seal measured a mm larger diameter than the one i pulled pulled out. And dang, i beat the hell out of the outter edge of the new seal during the install. Now im considering grabbing another and giving it another go before i put it back together. Definitely need a better punch to install it too. Did your new seal seem super tight and tough to hammer in? I had a real hard time pushing in the upper edge with the oil pan in the way.

Hey, I planned on a 2000 mile trip and replaced all front end parts trying to get rid of wobble at 60+ turns out my diff is no good. Do you think I can just remove the CV axles and run it till I can fix it properly after my trip?

Hey Kevin, great video man. Thanks for the info. How much if you took it to a shop to do that job?

Is the seal supposed to be flush? I cannot get mine to get flush. Mine sticks out a little less than 1mm.

So the prongs on tge seal dont match up because there are 12 slots on inner bearing and 14 prongs on the seal. So you just press it in until it cant go in anymore. The prongs get smashed which looks like tgey aren't needed since its just a seal/bearing. ??.

A few things missing from the video. I couldn't get the intermediate shaft slid all the way in to the passenger side after loosening it from the dif. Did you have to disassemble the 4x4 disconnect on the passenger side to move the shaft over?

The seal in both side the same size and parts number? Thanks very helpful video!

Kevin can you clarify this for me - does the engine oil do to that inner shaft seal since the differential is attached to the crankcase via that seal? Or is it just differential oil that is leaking out of that inner shaft seal?

How did you put the intermediate shaft back in Great video man you helped me twist the axle down so I can replace the seal man it was a pain to do lol but it worked I should’ve videoed in detail the whole thing lol

I have TB 02 4WD. I need to change the differential seals I’ve found the drive side but not the passenger, is it the same seal for both sides, My question is. the driver side can fit in the passenger side???

How did you put the intermediate shaft back in? The one through the oil pan?

can you help me mate? seals are same for pass. end driver side?

Nice truck BTW. Very clean underneath. You must not live where they use salt. Since you know those Envoys so well, do you know the answer as to the slight flickering of the lights & dash? Seems to be a common problem with these truck Can't believe there is no cure for this. It's not the Alternator BTW. If anyone knows the answer to this is you. Thanks, Andy

Is the inner diameter of the seal for the inner side of the differential the same size of the outer side that goes in the cv axle?

TY

I need help with my transmission bro

How many hours do you think you had in this job?

Hey body thanks can You give the part number of the seal please?

I changed mine after 150000 miles, both side seals, and CV axles, they leak like oil pressure switch

well that sucked. 4 hours of trying to get it turned.we got it where i think we could have get the seal out, but never get the new one in. i think you got the lucky bounce. also if you do this job take the passenger side apart ,change the seal s ,but most important thing is to grease the roller bearing they dont use oil. mind where bad. if you are going to try this way, well good luck ,my truck is now 2 wheel drive till i change the motor

What is that god awful noise at 8:49 and beyond in the background?

Yeah….ummm….wow….this shite is above my head! All I’m looking for is to make sure that I’m not forgetting something or what to look for when replacing my cv shafts on my trailblazer….wtf? I think I’m gonna put this pig back together clean it up and sell it lol….I can fix about anything but god damn! Chevy is an effing joke anymore

Don't like this video at all