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Yes I searched and I searched again.

How to remove a rear diff on an 04 GTO?

Any help would be appreciated. Pics will be EXTRA appreciated!
 

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...brah
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Specifically what questions do you have? I have had mine out twice.

Remove catback.
Drain fluid.
Remove driveshaft, or unbolt from rear yoke and drop it down.
Remove axle bolts from inner stubs.
Put jack under rear diff, and remove 4 bolts that hold rear end mount to the car.
Lower jack down.
Remove 4 bolts that hold top of diff to rear crossmember (this is the hardest part IMO)

Last time I pulled this, it took about 1 hour 15 min with the help of a friend. It really isn't hard at all.
 

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Discussion Starter #3
Specifically what questions do you have? I have had mine out twice.

Remove catback.
Drain fluid.
Remove driveshaft, or unbolt from rear yoke and drop it down.
Remove axle bolts from inner stubs.
Put jack under rear diff, and remove 4 bolts that hold rear end mount to the car.
Lower jack down.
Remove 4 bolts that hold top of diff to rear crossmember (this is the hardest part IMO)

Last time I pulled this, it took about 1 hour 15 min with the help of a friend. It really isn't hard at all.
That is exactly what I was looking for, thank you so much sir, BUT can you please tell me more about those "4 bolts that hold top of diff to rear cross member " thank You!!!
 

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...brah
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I can tell you they are a bitch. lol.

on my car I had to use a wrench on them with a cheater bar to break them loose. the rear subframe wouldn't drop down enough to allow me to get a ratchet up there.
 

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Discussion Starter #7
I can tell you they are a bitch. lol.

on my car I had to use a wrench on them with a cheater bar to break them loose. the rear subframe wouldn't drop down enough to allow me to get a ratchet up there.
Thank You Sir! :D

A bitch? I can have one out in about 20 mins. Tops.
nice :), post some pics of how you did it?

Thanks :)
 

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I can tell you they are a bitch. lol.

on my car I had to use a wrench on them with a cheater bar to break them loose. the rear subframe wouldn't drop down enough to allow me to get a ratchet up there.

+1
The 4 bolts are a PITA, but thats really the only hard thing to get to.
 

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...brah
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A bitch? I can have one out in about 20 mins. Tops.

You can have your whole rear out in 20 min? Does this include jacking up the car, putting it on jackstands, dropping the exhaust, draining the fluid, and dropping the driveshaft too?
 

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You can have your whole rear out in 20 min? Does this include jacking up the car, putting it on jackstands, dropping the exhaust, draining the fluid, and dropping the driveshaft too?
Yes. And there's no need to drain any fluid before removing it.
 

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This is a thread I did a while back:

Ok, I have been threatening to do this for a longtime, so here it is finally. A few weeks ago I ordered a set of 3.91s and a Harrop cover for my GTO. I decided that I was going to do a step by step how-to on the rearend removal and eventually the gear installation.

Pic of the car on jackstands, exhaust already removed:



Here is a pic of the tools you will need, a rachet with an 18mm socket, a medium sized adjustable wrench (or an 18mm wrench, I didn't have one handy), a 15mm wrench, a 17mm wrench (and another one to use as a cheater), another rachet with short extension and a 13mm, 14mm and a 15mm DEEP socket, an 8mm allen and a 5mm allen:



You will also need a foor jack and some jack stands.

In this pic, you can see the torx head bolts on the pinion flange. I do not know what size these are exactly, but a 12 point 14mm socket it fits it perfectly. Works good. You will have to remove all 6 of these bolts. 3 have the torx heads and the other three are 18mm with locking nuts on the back side. The center support for the driveshaft has two 13mm bolts. Once all the bolts on the pinion flange are removed and the center support mount bolts, the entire shaft can be removed. You have to wrestle with it a bit to get it past the nipple on the pinion gear, but it'll come. You need to force it forward as much as it will go once its unbolted from the pinion flange.



Here are the forward (upper) mount bolts. There are two, they are 17mm. It is easier to get to them after the driveshaft has been removed. I used a regular 17mm wrench with an 11/16 doubled on it as a cheater.





There are a total of FOUR of these bolts on top of the rear subframe. The rear upper two can't really be seen until you unbolt the rear mount and let the entire assembly down. Then you can get to them, also 17mm. I used the same double wrench technique to get them loose. You have to have all four of these bolts out and the four bolts that hold the rear mount in place in order to get the rearend out. There's also a vent pipe up on top that you will have to disconnect. Below is a pic of the rear mount, the four bolts are 13mm:




Next, you have to remove the antilock brake sensors and unbolt the half shafts from the stub axles. The ABS sensors have a single 5mm allen holding them in and the half shaft bolts are 8mm allens.





Now, once you have all this unbolted you can easily remove the rearend. Keep in mind that you will need to keep it supported on a floor jack while unbolting the mounts. I unbolted the half shafts and all the other stuff first, then did the mounts last. Unbolt the forward upper mounts first, then the rear mount, then you can let it down to get to the top rear mount bolts. Once they are out, it'll come on out. This job took me 45 mins from start to finish and that included removing the exhaust.



 

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Note that the 45 min time frame I mentioned in this particular thread was the very first time I ever did this job. After you've done this a few times it's a breeze.
 

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Took my mechanic and i 3 hours...But my car was rusty as hell on the bottom..Plus there was beer involved...
lol...the car in the pics I posted was brand new, I think it had about 400 miles on it when I pulled the rearend out of it.
 

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Almost positive that torx bolt is an E-18. Near impossible to find the socket ... had to buy a whole set ... now it just collects dust, lol.
 

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Almost positive that torx bolt is an E-18. Near impossible to find the socket ... had to buy a whole set ... now it just collects dust, lol.
Which is exactly why I used a 12 point 14mm socket instead. lol
 

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. I decided that I was going to do a step by step how-to on the rearend removal and eventually the gear installation.
I am very impressed with the thorough detail of this stet by step. Excited to see the gear installation step by step.
 

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I switched the whole rear diff in my 04 gto but when i get going about 15-20 the rear end wobbles real bad. Anyone know whats going on?
 
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