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-   -   Replacing differential cover DIY (http://www.the370z.com/engine-drivetrain/100315-replacing-differential-cover-diy.html)

Dragon_Ball_Z 01-28-2015 09:54 AM

Replacing differential cover DIY
 
Has anyone posted a diy to replace the differential cover? The shop wants $300 to do this and I'm trying to see if it's not too difficult to do. Thanks


-Raj

JARblue 01-28-2015 10:00 AM

Seems high to me. I paid around $225 to replace the rear diff bushing. I think the parts to be removed are pretty much the same, but I think removing the worn bushing from the subframe is a lot more labor than just replacing the diff cover. So I would expect to pay a little less for the diff cover work from the same guy.

But I only farmed out that work because I didn't want to jack with that one bushing. I would absolutely DIY the diff cover myself if I had one to install.

Dragon_Ball_Z 01-28-2015 10:08 AM

Replacing differential cover DIY
 
Quote:

Originally Posted by JARblue (Post 3094893)
Seems high to me. I paid around $225 to replace the rear diff bushing. I think the parts to be removed are pretty much the same, but I think removing the worn bushing from the subframe is a lot more labor than just replacing the diff cover. So I would expect to pay a little less for the diff cover work from the same guy.

But I only farmed out that work because I didn't want to jack with that one bushing. I would absolutely DIY the diff cover myself if I had one to install.


How do I know if the bushing is bad too? Should I replace that too since I'm already doing the cover? Sounds like a good price too bro


-Raj

JARblue 01-28-2015 10:48 AM

Get under the car and look at it. Shouldn't even need to lift it. Look for fluid leaking from around the bushing on the back side of the subframe member and look at the diff itself adjacent to the front side of the subframe member. Mine mostly leaked on to the differential, but I have seen ones blow out the back and spray the silicone crap all over the exhaust pipes.

Dragon_Ball_Z 01-28-2015 10:58 AM

Quote:

Originally Posted by JARblue (Post 3094939)
Get under the car and look at it. Shouldn't even need to lift it. Look for fluid leaking from around the bushing on the back side of the subframe member and look at the diff itself adjacent to the front side of the subframe member. Mine mostly leaked on to the differential, but I have seen ones blow out the back and spray the silicone crap all over the exhaust pipes.


There is no fluid left in the differential cover because the differential cover I have on there is busted.


-Raj

JARblue 01-28-2015 11:14 AM

Quote:

Originally Posted by rajmangal7 (Post 3094949)
There is no fluid left in the differential cover because the differential cover I have on there is busted.


-Raj

I'm not talking about diff fluid. I'm talking about the silicone crap that is from the bushing holding the differential to the subframe member. If the bushing is blown it will leak fluid down the outside of the diff cover. Now if there's already diff fluid all over your diff cover, then that will make it a little more difficult. But just look at the subframe member on both sides of the bushing. If it's blown, you should be able to tell. I recommend the whiteline poly bushings or spl if you want solid for performance.

chops 01-28-2015 11:37 AM

you should replace the bushing if you're going to drop the diff just to put on a new cover. whiteline bushing is < $100 shipped in most cases. especially since that bushing WILL fail. just a matter of when. i paid ~400 to have my diff bushing installed at a reputable shop since they had such a hard time removing it

JARblue 01-28-2015 11:39 AM

:iagree:

if you have the diff out to install the finned cover, might as well do the whiteline upgrade...

Dragon_Ball_Z 01-28-2015 12:00 PM

Quote:

Originally Posted by chops (Post 3095002)
you should replace the bushing if you're going to drop the diff just to put on a new cover. whiteline bushing is < $100 shipped in most cases. especially since that bushing WILL fail. just a matter of when. i paid ~400 to have my diff bushing installed at a reputable shop since they had such a hard time removing it


How will the bushing help with performance?


-Raj

YzGyz 01-28-2015 12:07 PM

I will be dropping my rear differential later today to swap out the cover and change the bushing. I might make a quick video with a fast how to. We will see.

YzGyz

JARblue 01-28-2015 12:07 PM

Quote:

Originally Posted by rajmangal7 (Post 3095027)
How will the bushing help with performance?

It can handle harder launches. Less slack in the drivetrain under load.

Dragon_Ball_Z 01-28-2015 12:08 PM

Quote:

Originally Posted by YzGyz (Post 3095033)
I will be dropping my rear differential later today to swap out the cover and change the bushing. I might make a quick video with a fast how to. We will see.

YzGyz


Sounds great I'm really looking forward to the video and pics! Reps gonna come :D


-Raj

YzGyz 01-28-2015 06:36 PM

I spent the last 1hr or so taking everything in the way of dropping the rear differential out. I'm currently draining the oil out of it so that I don't have a big mess when I crack her open. I'm on a dinner lunch break as I let gravity do its thing. So far, so good. No big obstacles yet. We will see if that changes as I try to pop the bushings out.

YzGyz

Dragon_Ball_Z 01-28-2015 06:37 PM

Replacing differential cover DIY
 
I hope the video is coming along great ! I'm glad to hear everything is going great!


-Raj

YzGyz 01-28-2015 06:46 PM

The video is a little Blair Witch but I'm doing it as I go. It's nothing special. Its a simplified run of removing the whatever is needed to be removed and swapped out. I'm not going to record the reinstall as that is just everything backwards. However, I might record the rundown of how I put the diff back into place as it may be tricky. Like I said, it's an easy job thus far. I will post it in the DIY and link it here after everything is done.

YzGyz

Dragon_Ball_Z 01-28-2015 06:47 PM

Quote:

Originally Posted by YzGyz (Post 3095368)
The video is a little Blair Witch but I'm doing it as I go. It's nothing special. Its a simplified run of removing the whatever is needed to be removed and swapped out. I'm not going to record the reinstall as that is just everything backwards. However, I might record the rundown of how I put the diff back into place as it may be tricky. Like I said, it's an easy job thus far. I will post it in the DIY and link it here after everything is done.

YzGyz


Sounds great I really appreciate all your help


-Raj

dP3NGU1N 01-28-2015 08:55 PM

Do you even need to drop the diff to remove the cover?

YzGyz 01-29-2015 03:56 AM

Quote:

Originally Posted by dP3NGU1N (Post 3095496)
Do you even need to drop the diff to remove the cover?

Yes, you do. There is not enough space to get to all the bills that hold the cover in place. Even if you do somehow get the bolts out, you probably went be able to get the oem cover payee out and the new cover back in.

Anyhow, I just finished the install and cleaned up the tools. I will post videoso later hope they came out okay.


YzGyz

YzGyz 01-29-2015 06:44 PM

Here are the videos I made. I added them on to the old DIY thread so everything is in one place.

http://www.the370z.com/diy-section-d...-bushings.html

YzGyz

Dragon_Ball_Z 01-29-2015 07:26 PM

Thank you!! I'm gonna use this Saturday.


-Raj

chops 01-29-2015 08:18 PM

Quote:

Originally Posted by YzGyz (Post 3096495)
Here are the videos I made. I added them on to the old DIY thread so everything is in one place.

http://www.the370z.com/diy-section-d...-bushings.html

YzGyz

hmm...what podcast were you listening to? sounds like we are all we need in the background :tiphat:. good job on the videos

YzGyz 01-29-2015 08:46 PM

Quote:

Originally Posted by chops (Post 3096563)
hmm...what podcast were you listening to? sounds like we are all we need in the background :tiphat:. good job on the videos

I was streaming music off my phone that I plugged into my monitor speaker.

I usually stream Digitally Imported radio (DI.FM). They have lots of channels to choose from.

The music in my videos were YouTube streams of Above and Beyond Group Therapy.

YzGyz

YzGyz 01-29-2015 08:48 PM

Quote:

Originally Posted by rajmangal7 (Post 3096532)
Thank you!! I'm gonna use this Saturday.


-Raj

SAFETY GLASSES!!! OMG did some juice and rubber fly! An extra hand will really help.

YzGyz

chops 01-29-2015 11:07 PM

Quote:

Originally Posted by YzGyz (Post 3096589)
I was streaming music off my phone that I plugged into my monitor speaker.

I usually stream Digitally Imported radio (DI.FM). They have lots of channels to choose from.

The music in my videos were YouTube streams of Above and Beyond Group Therapy.

YzGyz

yea, i heard the A&B/zoe johnston? sounded like "we are all we need" heh

Dragon_Ball_Z 01-29-2015 11:18 PM

So you would still drop the driveshaft and axle for the differential cover?

chops 01-29-2015 11:22 PM

Quote:

Originally Posted by rajmangal7 (Post 3096666)
So you would still drop the driveshaft and axle for the differential cover?

yes, its impossible to do it otherwise. this is why everyone here has told you to purchase the whiteline diff bushing while you're at it

Dragon_Ball_Z 01-29-2015 11:23 PM

I am gonna order that tomorrow since I'm already gonna be at it. Might as well, thanks for the help guys!


-Raj

YzGyz 01-30-2015 05:05 AM

Quote:

Originally Posted by rajmangal7 (Post 3096666)
So you would still drop the driveshaft and axle for the differential cover?

I was able to push the drive shaft to the side and then lower the end of differential then pry it out. I left the drive shafts in place. I recommend lifting the car up as high as possible (both front and back, not just the back like I did) to give you more room to work the saw, drill, pry bar.

YzGyz

Dragon_Ball_Z 02-01-2015 02:35 AM

Quote:

Originally Posted by YzGyz (Post 3096747)
I was able to push the drive shaft to the side and then lower the end of differential then pry it out. I left the drive shafts in place. I recommend lifting the car up as high as possible (both front and back, not just the back like I did) to give you more room to work the saw, drill, pry bar.



YzGyz


I spent about two hours today and successfully removed the differential. Thanks for your video YzGyz. Rep +1!!!!


-Raj

Dragon_Ball_Z 02-02-2015 12:54 PM

Ok guys, so how did you clean the inside of the differential? like when you replaced the cover to get all that gunk out? I want it to be clean for the fresh new fluid i put in there

YzGyz 02-02-2015 04:59 PM

I used break cleaner spray To clean the inside of the differential.

YzGyz

Dragon_Ball_Z 02-02-2015 11:33 PM

Quote:

Originally Posted by YzGyz (Post 3099809)
I used break cleaner spray To clean the inside of the differential.

YzGyz


Thanks bro, I'll buy two cans of that and put it back together. So to do a lsd swap I have to drop everything again right? It is a base open diff right now.


-Raj

YzGyz 02-02-2015 11:48 PM

Yes, you have to drop the rear differential again, then crack open the cover and swap the internal LSD out. You have to get the LSD shimmed and balanced. I would leave the shimming to someone who knows how to.

Slop up as much oil as you can with throw away towels, then spray everywhere with the cleaner, whipe her down again and air dry for a little bit. Apply the gasket material onto the cover, make sure to go around the screw holes. Put the cover back on finger tight then let it dry for at least an hour before you go back and tighten everythign down with the wrench.

YzGyz

Dragon_Ball_Z 02-02-2015 11:49 PM

Quote:

Originally Posted by YzGyz (Post 3100106)
Yes, you have to drop the rear differential again, then crack open the cover and swap the internal LSD out. You have to get the LSD shimmed and balanced. I would leave the shimming to someone who knows how to.



Slop up as much oil as you can with throw away towels, then spray everywhere with the cleaner, whipe her down again and air dry for a little bit. Apply the gasket material onto the cover, make sure to go around the screw holes. Put the cover back on finger tight then let it dry for at least an hour before you go back and tighten everythign down with the wrench.



YzGyz


Thanks for the help bro. And so drop the diff again and where can I get a lsd balanced?


-Raj

YzGyz 02-02-2015 11:54 PM

I would call around. I would think any place that works with drivetrains will be able to do it. Just call around and ask. Be sure to ask for how long it will take, price and if you can just bring in the rear differential with the LSD and get it done.

YzGyz

Dragon_Ball_Z 02-02-2015 11:55 PM

Quote:

Originally Posted by YzGyz (Post 3100119)
I would call around. I would think any place that works with drivetrains will be able to do it. Just call around and ask. Be sure to ask for how long it will take, price and if you can just bring in the rear differential with the LSD and get it done.



YzGyz


That sounds good to me, so I need to replace the fluid again and should I get the driveshaft balanced since it was taken off too? I ordered whiteline bushings since the diff is already out anyways.


-Raj

YzGyz 02-02-2015 11:57 PM

I have never heard of balancing the driveshaft. Plus our drivshaft is CF, not sure how they will do it.

YzGyz

Dragon_Ball_Z 02-03-2015 12:01 AM

Quote:

Originally Posted by YzGyz (Post 3100123)
I have never heard of balancing the driveshaft. Plus our drivshaft is CF, not sure how they will do it.



YzGyz


Cf as in carbon fiber? I marked the driveshaft when taking it off, I'm just worried it won't go back into the same way I took it off


-Raj

YzGyz 02-03-2015 12:25 AM

yes, carbon F. You didn't need to take it out to drop the rear differential. You can just lower the front end of the differential and then pry the back end out. If the driveshaft dont go in right, try spinning the driveshaft and you put it in. The splines should eventually match up and slide right in. At least that what I did when I removed it and did the clutch and CSC install. If the 4 bolts dont line up, you can just spin the front end of the differential where the bolts attach to line them up.

YzGyz

Dragon_Ball_Z 02-03-2015 12:27 AM

Quote:

Originally Posted by YzGyz (Post 3100145)
yes, carbon F. You didn't need to take it out to drop the rear differential. You can just lower the front end of the differential and then pry the back end out. If the driveshaft dont go in right, try spinning the driveshaft and you put it in. The splines should eventually match up and slide right in. At least that what I did when I removed it and did the clutch and CSC install. If the 4 bolts dont line up, you can just spin the front end of the differential where the bolts attach to line them up.



YzGyz


I Dropped just the 4 bolts, not the whole thing so just line them up?


-Raj


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