Just picked up a 3.636 rear end though.
https://www.miataforumz.com/attachme...ine=1332943848

After leaving the gym last night I stopped by to catch a beer with a buddy of mine.. Look what was also out for a drink... :makeout:
http://www.miataturbo.net/attachment...ine=1332943638

They don't drink beer, cars with balls like that go straight to whiskey and snack on hybrids.

miatas look so small parked next to the new cars. lol

BAM.

http://www.miataturbo.net/attachment...ine=1333032710

Flex pipe on my BEGi Downpipe also started to leak.. picked up this guy.

I'll likely end up snagging the FM downpipe brace because it's sexy. Anyone know if it works with the BEGI pipe?

https://www.miataforumz.com/attachme...ine=1333048542

Needed to knock the dust off my old friend here.. Time to get some work done.

http://www.miataturbo.net/attachment...ine=1333116018

Car looked cute pre-surgery.
http://www.miataturbo.net/attachment...ine=1333116018

All out with the jack stands. Come on differential.. come here..
http://www.miataturbo.net/attachment...ine=1333116018

Picked up some Gear Oil and decided some braided lines wouldn't be a bad idea either. :drool:
http://www.miataturbo.net/attachment...ine=1333140087

My BEGi downpipe was leaking beyond the point of me dealing with it. The flexpipe was blown out so I picked up a replacement piece from Vibrant. The job was a bit tedious with the position of everything and I was not 100% confident that I could pull it off in one go. Luckily I have a friend who is likely one of the best welders I'll ever meet.

He was happy to help out.
http://www.miataturbo.net/attachment...ine=1333379115

And as expected- it looks like jewelry. His welds are both the ones immediately next to the flex material and the one that meets my downpipe.
http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

I pulled the diff and knew the bushings were bad so out they came. Heated it up and pounded it out with my bawse-ass-air-hammer.
http://www.miataturbo.net/attachment...ine=1333379115

The new mounts obviously didn't want to slide in so I drilled a hole in a piece of aluminum and ran a bolt through it with my fancy ratchet.
http://www.miataturbo.net/attachment...ine=1333379115

Now it was time to get to the fancy stuff. I pulled the diff apart and started to disassemble it. Everything looked pretty clean.
http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

New gears and old gears. The new ring got the old better safe than sorry treatment with some loctite.
http://www.miataturbo.net/attachment...ine=1333379115

The new pinion installed. The old one was a bit of a tough one to get out. Required some rather serious pounding.
http://www.miataturbo.net/attachment...ine=1333379115

Ring gear torqued on. (51-61 ft-lb)
http://www.miataturbo.net/attachment...ine=1333379115

The bearing caps didn't look very clean so I got them back in shape with some light scuffing.
http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

Dropped the caps on and installed the bearing adjusting rings. These are used when setting up the diff. They basically allow adjustment of preload and the position of the ring gear against the pinion for setting the proper backlash clearances.

To move the diff right- loosen the right ring and tighten the left ring... Simple.
To adjust preload- Tighten them both or loosen them both.
http://www.miataturbo.net/attachment...ine=1333379115

Next it was time to setup the dial indicator. I used a random transmission line hanger from a small block chevy to mount my Dial Indicator. I made some adjustments after this picture in order to make the measurement at the 90 degree marks but you can get the idea.
http://www.miataturbo.net/attachment...ine=1333379115

http://www.miataturbo.net/attachment...ine=1333379115

The ring gear backlash needed to fall between (0.0036-0.0043) so I set it to 0.0038 and checked the measurement at 4 points on the gear.

Then you must check the bearing preload. There are four points on the bearing caps and the preload is measured between these points. You measure the tabs diagonal from each other. The preload must be (7.3004-7.3031). I aimed for 7.3025.

You can see that my digital micrometer didn't have big enough arms on it so I used some aluminum angle to extend the range. I was super careful and extremely precise with this.
http://www.miataturbo.net/attachment...ine=1333379115

Again these adjustments are done by rotating the bearing rings so you should try to move them both equally to not mess up your already set backlash. Once you are happy with the preload numbers, recheck the backlash and install your adjuster locks.

I cleaned up the gasket surface and applied RTV silicone. Then I dropped the assembly back into the casing. Installing the diff back in the car was a snap. Everything went together nicely.

Then I moved on to the braided brake lines. These went as expected. The NB has a splitter block built into the passenger rear side from the factory and my Goodridge lines had a nice fancy replacement part. These lines look awesome.
http://www.miataturbo.net/attachment...ine=1333379115

The night had turned into morning and I was out of brake fluid anyways. I'll finish her up tonight after work.
http://www.miataturbo.net/attachment...ine=1333379115

:bigtu:

So sick, need some daytime vids :D