turborotor

You did take the exhaust out from the y back, right?

pengaru

just remove the stuff that is mentioned in the shop manual picture, (indicated by numbers and lines) the things circled in red don't need to be removed. There's 5 main things that come undone, just the 4 large nuts, indicated by #7 and #5, and just that link bolt #4. With these removed and nothing supporting the subframe from below (wheels/tires on ground or exhaust parts etc) it should literally fall pretty far away from the car. The diff is pretty heavy so it will fall down kinda hard, be careful. Don't be underneathe it, especially if you are doing this on the ground with jackstands. I actually put a floor jack underneath the subframe in the center right under the diff housing area and let it down kindof slowly becuase I'm paranoid.



Please be careful :P It should be pretty simple to get out, just systematically check all the nuts/bolts and make sure there is nothing obstructing it from coming out.



If it starts to come out unevenly what can happen is the sleeves in those rubber mounts will get hung up on the threads of the studs, if you really get the edge of the sleeve worked into the threads it probably won't come out easily, the best thing to do here is just grab a floor jack and support the subframe from underneath and press it back up against the bottom of the car, the subframe/diff assembly is basically bound together via a large rubber block, so the center will 'sag' shortening the distance between the front and rear mounts, which can result in everything really grabbing onto those stud threads. Support it in the center near that rubber block on the diff housing (indicated by #6 in the illustration) with a floor jack so the whole assembly is level. Then lower it slowly with the floor jack making sure the mounts/sleeves are all sliding off the studs (where nuts #5 and #7 go) evenly, if you do this it should ensure that none get hung up on the threads and it should literally come completely off the studs quite easily, assuming you have that single link bolt removed (#4). Do not force it out! If you get hung up on those threads and start prying it out you might find yourself with some very fucked up threads when you go to reinstall the subframe/diff assembly.



Think of the assembly as two major parts, a diff and a subframe, connected with a rubber band. Not as a single solid assembly, care needs to be taken to keep both sides moving together when you lower it, and support should be provided in the center, where that rubber block/junction of the two major parts is. Especially on high mileage cars from the 80's, the rubber is pretty tired.



I should have taken pictures of this when I did it



hope this helps.

1Revvin7

Yes.

Oh pengaru: I have all those bolts off that u mentioned, everyone i circled is off, and it only came down 2 inches. SO i have no clue why it doesn't come down. I have a huge jack supporting it too.

1Revvin7

I got it; I just had to pry at those rubber mounts on the subframe and diff. I have got one more Q for u guys though. U know how the diff has 3 bolts connecting it to the subframe. How do u get the lower rear bolt off? I can't get anything in there and they are on tight! :unsure:

pengaru

I think I got those off using my 'gear wrench' (tm or something) racheting wrenches, they make alot of those situations simpler. I think napa carries them, I got them off a matco or snapon truck though.

1Revvin7

I got it, i just finally took the subframe down so it was totally off those studs and got a big wrench in there and yanked it out, it was interesting to see both diffs, the TII one is way bigger/heavier and has bigger connections for the halfshafts, once again thxs for all the help.

--One more Q though: i need to get my brake discs off the get the bearings out so i call replace my halfshafts w/ the tII ones, they are stuck on really tight what should i do?-----

OKIERX-7

IIRC, there are a couple of big phillps screws holding the rotors on. I used a big slotted screwdriver to get those out. Be careful though, those screws like to strip out easily. I think that will get your rotors loose. It's been awhile since I did my bearings....Could also be different on an S4?



I just did my differential mount tonight, AAARGH! What a PITA! I wish I had read this thread earlier : (

1Revvin7

IIRC, there are a couple of big phillps screws holding the rotors on. I used a big slotted screwdriver to get those out. Be careful though, those screws like to strip out easily. I think that will get your rotors loose. It's been awhile since I did my bearings....Could also be different on an S4?



I just did my differential mount tonight, AAARGH! What a PITA! I wish I had read this thread earlier : ([/quote]

I've gotten the screws out.

Its a fun project huh?