

Felt good to use the press since I tend to use it once every 2.5-3 years LOL
Dropped the diff out, and removed the LSD from the carrier.

swapped over the crown gear onto the kaaz unit. Used some longer flywheel bolts (m12x1.5) as sacrificial bolts since the bolts pull the crown gear to seat properly onto the LSD.

cleaned up the 10 crown bolts before applying red loctite and torquing to spec

installed the bearing race(s) and oil seals. Made sure not to block the oil passage.

used some gear marking paint to check back lash.
Original shims were Left: 1.8mm and Right 1.6mm. (apparently you need to keep the shims at 3.4 total)

^ some noticeable root toe contact
I changed the shims out twice and checked each combo and ended up using the racing diffs 2.0mm/1.4mm shims and this is a much better contact patch.


^ r&p contact much more central on the crown gear.
Dial indicator was used to measure the backlash, but here's a pic of it zero'd out. Measured in at .005-.006 which is thankfully within spec (.005-.008)

I was curious and sent RacingDiffs a pm on IG.

pretty happy I went with them for the shims. They really have the most in-depth guide on YT.
Will probably check again once more before final clean up and slapping the cover back on and filling up. Figured it'd be a good idea to let the loctite settle before filling it up. Super excited to see how different the car reacts to the 12 plate 2 way. Despite the kaaz being the SUPER Q model, I will probably do a similar break-in process like I have in the past. I'm definitely not planning on NOT testing it out before the next event lol.
edit: cleaned up as much of the gear marking compound as I could even though it is "diff fluid safe" supposedly. brushed on a light coat of kaaz diff fluid onto the diff and halfshafts and went through the cleaning process of the cover and all hardware.

I'm not going to be able to reinstall the diff into the car until Sunday due to my schedule. Meanwhile I'll be thinking about how I should fill up the diff fluid out of this metal can (pre or post install). Been trying to look for substitutes for the kaaz diff fluid (mineral based). Anyone have any recommendations? I'll probably just have to order the kaaz fluid moving forward - no big deal.
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Edit: 02/21
Got the diff back in the car on Sunday with help of a fellow e30 buddy. My jack totally sucks to use since it has the twist knob at the end of the handle so I reached out for help. Bushing mounts were loose in this pic. I was just happy to get the damn thing back up in place.

I know its not necessary, but I've been comparing track shots (under load) and static shots and think I may order a pair of 60mm swift 5" 14k rear springs. ride height under load is perfect with 6" 12k springs, but I do want to lower the car a bit without having tire issues on track. If it's terrible I can always swap back....but IF I install them, setup ride height and get an alignment, chances are I'm not going back at that point.
Also trying to figure out ride height with the car completely loaded with track day equipment too. Figured this might be the first step before going for wider tires since this will ultimately be affected as well. so currently it is 9/12kg (504/672 lb/in) so i would be upgrading to (504/784).

Feels good to get that project done. I will be taking it out for a small break-in process later this week. There is another vegasdrift event this weekend. I'm not 100% I can make it due to it being on a work-day.
Also swapped out the steering base on the rig. Bought a FANATEC DD1 (direct drive goodness). Turns out the V2 had some connection issues.

Downloaded ACS and Content Manager and started to download some cars and maps. But tbh the most fun has been playing WRC10. doing those iconic rally races in all types of weather conditions has been ridiculously fun. There goes all my productivity!!

















































































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