Rear main Seal

[lspann3525]

Today I started trying to remove the exhaust ..I was able to get all 3 nuts on the passenger side exhaust manifold unbolted. But on the drivers side im having a hard time getting the 2 remaining nuts off. Im unable to get my impact with swivel and extentions to the nut on the driver side because the frame is sort of in the way..Im able to get an open end wrench thru the driver side wheel well but not enough force to break it loose. Anyone have any tricks for getting the nuts on the driver side off...

 

[lspann3525]

What size is the exhaust stud nut...I have been using a 15mm impact socket

 

[Larryjb]

Here's my experience a couple of years ago:

Rear Main Oil Seal Replacement

Okay, you guys have helped me out tons with stuff. Maybe this will help newbies. As others have said before, removing a transmission is just LOT of work. None of it is particularly hard. This comes with a couple of caveats though: 1) Get a good low profile transmission jack and test it out...

www.tahoeyukonforum.com

 

[Larryjb]

Some other reading that may be useful:

Rear Main Oil Seal

Based on MJReynolds' experience ( https://www.tahoeyukonforum.com/threads/engine-ticky-ticky-ticky-sound-at-idle-2007-tahoe-5-3l-135-000-miles.116461/page-8 ), I have decided to do my own rear main oil seal. He did not have to remove the transfer case, but I'm nervous about balancing the...

www.tahoeyukonforum.com

Disassembly begins on p. 13 post 121.

 

[lspann3525]

Got the rounded exhaust nut off using a deep socket extractor..and the remaining bolts of the driver side now onto the crossmember,

 

[lspann3525]

Trying to see how I can lock the motor to get the torque converter bolts off

 

[mattbta]

Looks like this one could hold the flywheel if you have the starter out?

Pardon Our Interruption...

www.ebay.com

 

[Rocket Man]

Looks like this one could hold the flywheel if you have the starter out?

Pardon Our Interruption...

www.ebay.com

I use one similar. You just need to move the starter out of the way so I leave the cables hooked up, remove the bolts and just slide it into a cranny on top of the frame.

 

[lspann3525]

The starter has already been removed already. Can this tool be purchased locally??

I'm unable to get my impact wrench up there

 

[Larryjb]

Trying to see how I can lock the motor to get the torque converter bolts off

I don't remember this being all that difficult. I didn't have to use any special tools. I may have manually put the transmission into park to lock it in place while undoing the bolts, but I don't think I even had to do that. I may have given the wrench a good sharp wack to break torque.

This video was useful for me:

This video was made after I did mine, and it shows removing the flywheel nuts at 10:50 min:

 

[lspann3525]

Mines not coming off that easy. When I use the ratchet and socket the flywheel starts to spin.

On my old Ford I could jam and extension or screw driver in the access spot. I tried a screwdriver but it may of not been big enough.

 

[89Suburban]

I don't remember this being all that difficult. I didn't have to use any special tools. I may have manually put the transmission into park to lock it in place while undoing the bolts, but I don't think I even had to do that. I may have given the wrench a good sharp wack to break torque.

This video was useful for me:

This video was made after I did mine, and it shows removing the flywheel nuts at 10:50 min:

Man o man I surely do NOT miss that bullSHT. Gettin old.

 

[Sam Harris]

I’m glad it worked out for you. My experience with Dorman has been hit or miss and considering how hard it is to replace a rear main, I won’t be taking a chance myself. My OEM was in for 150k and still not leaking when I replaced it with the same as preventive maintenance.

Agree 100%. Hell, I went with the full OE rear cover, with the rear main already installed, to take advantage of one less thing to go wrong with that extensive labor. Worth it..

 

[Rocket Man]

Mines not coming off that easy. When I use the ratchet and socket the flywheel starts to spin.

On my old Ford I could jam and extension or screw driver in the access spot. I tried a screwdriver but it may of not been big enough.

Actually, for the converter I used a big screwdriver through that access hole since you need to turn the flexplate each time you remove or install a bolt. That tool won’t work good for that, it’s meant for the harmonic balancer bolt.

 

[donjetman]

The factory must use loc-tite on them? Here's what I used, see post # 13 here: https://www.tahoeyukonforum.com/thr...7-yukon-denali-6-2.108334/page-2#post-1291646
from Harbor Freight

 

[lspann3525]

Only if my air compressor worked I got an old 230v in the garage but I can't find anyone to wire me an outlet. That's what made me get the impact.

I grabbed a 12" screwdriver from Lowes I'm gonna crawl back under later on to see if that will lock the motor.

I'm also having 2nd thoughts about the dorman like y'all said. I googled the seal and there was a bunch of people that said the seal leak right after installation.

 

[lspann3525]

I give up I guess I dont have the right tools...if I was to get an air ratchet how strong would it need to be to undo the torque converter bolts?

 

[89Suburban]

I give up I guess I dont have the right tools...if I was to get an air ratchet how strong would it need to be to undo the torque converter bolts?

Good old old school tools, leverage and determination. If you want it bad enough, it will come to you.

 

[Larryjb]

I got me one of these:

M18 FUEL™ w/ ONE-KEY™ High Torque Impact Wrench 1/2" Friction Ring (Tool Only)

www.milwaukeetool.com

It's been worth every penny. Never looked back! Saves my back on wheel lug nuts and everything. (I still use the torque wrench in the end on lug nuts etc.)

 

[lspann3525]

I have a craftsman battery powered impact wrench I'm just unable to get it in the space the front diff/frame is in the way if my impact was a little more slim I could do it. I am going to start looking for a compressor today but im not sure about the gallons and psi I will need