Zedyone_kenobi

Well I will have a 4 speed with 3.90 gears soon, but looking at that webpage walter posted, I think i will want a 5 speed in less than 12 months.

Well I failed to get a hold of you as kid things have been ruling my time. Well that and I decided to yank out my diff as well:) Good to see so much great progress. I am still on for lunch at your cafe. Maybe next friday as I have off that day. Would love to hear more about your Z. Keep up the great work!

Oh I will reuse my old ones, they cleaned up nice, but I was just shocked at the price MSA wants, I would always call courtesy before ordering something like that.

Well I am well on the way to finishing this. I have all my seals coming in, and I am almost done tracking down some new shiney hardware. I polished the plates on the side with a wire brush and painted the new diff with some POR chassis black for presentation purposes. I am still cleaning up parts in the spare time. On a side note, has anybody priced the bolts that connect the half shaft to the hub on the rear wheel? EACH bolt is 12.57 at MSA! EACH BOLT!! You need 8 of them!!!! I am going to have to invest in a CAD plate kit from Eastwood soon. I like my hardware to be perfect when it goes together. I have a rare phobia against dirty threads... called impropertorqueaphobia

Well then number 2 it is!!

need some advice on what kind of mount to use with the new diff Here are my options: 1) Buy a new strap and go back to OEM. Motorsport sells replacement straps that will probably work. 2) Go with the RT mount with the bump stop on top and the OEM on bottom 3) Go with the RT mount with the GM motor mount option that has no lower mount (this one I need some help on) Figure OEM would work, and I never really had a clunk to speak of. But I would be interested in opinions. Also if anybody knows the mount needed for the RT to work as a standalone let me know THanks Blue! I got the studs out of the other diff without any problems. I removed the flange from the OEM diff and then set it on a solid surface and with a 5 lb maul just tapped out the old studs. They pressed into the Wolf Creek flanges without any fuss what so ever. They went in actually very easy. Probably some permanent set on the studs, but they will work as they are.

I think Blue is having a side bar not exactly on this subject. But related The OEM Datsun half shafts should bolt up to the Wolf Creek output flanges just fine. I have not checked the fit, but I am not too worried about it. They should fit, if not I will deal with it. This is all about rolling with the punches and not making a square peg fit into a round hole. The right decision will not always be the easy or cheap one. But I will tackle my half shafts after I get my Diff done up the way I like it. I have just been cleaning up parts with a wire wheel and gathering some hardware…

Okay I double checked and yes Madkaw, you are 100% correct, they should just pop in with some persuasion. I just spent 15 minutes trying to see if I could polish the diff cover.. Um… it is going to take some time! But all is well. Found some new bolts and washers and lock washers to install. Just need about 2x as many. Will have to hit up some hardware places for metric CAD plated bolts.. Dont laugh at me!!

That seems to be the trick, but what worries me now is the new output shafts require some kind of c-clip or ring to hold them in. The R180 as packaged by Datsun does not have these rings. Now I may have to source some.

Took the day off to have some free time on what must be the most lovely day of the year so far in the Houston Area. Fired a pot of coffee, turned on my favorite country station, and slowly began taking the factory diff out of the car. Well less than 2 hours later… I was done. I sprayed some simple green on the OEM diff and then drug it out into the sun to compare it to the STI diff. I would wager more people will want to see the comparison of the two… so without further ado: Next think want to do is pull off the rear cover and the side covers off the STI diff and give them a good cleaning. The rubber seals where the output shafts contacts look to be a bit rough. I may have to go by Subaru parts to get more rubber seals so they do not leak. They may be the same as the Datsun ones, I do not know until I pull the sides off. Will probably get new bolts or send mine off to get cleaned and plated. Not sure yet. Everything unbolted perfectly fine. I had to cut the old Diff strap off to get it out as my exhaust was too big and would not let the diff crossmember move out of the way. But this may give me a chance to finally use the RT Diff mount I have had for 2 years. Well that is enough work for now. I have to start looking to get parts cleaned. Then I can make a run to the storage unit and get my spare diff and pull the half shafts. Anybody have any advice on puling the OEM halfshafts out?

THanks madkaw, I was about to look up what kind of LSD is in the 2004 unit

No, I have a spare R180 Diff in my storage unit I plan to take the studs off. I will leave this Diff untouched as it came with the car. So I will rob the studs from that diff. Figured I would save a few bucks doing it that way. I have been wanting an arbor press for a while anyway, it can have so many uses. So I figured why not pick one up.

Studs that go into the half shafts.

parts are in. Just waiting on my press!

UPDATE: Diff came in Saturday and Half shafts Friday. Huzzah! I ordered a one ton arbor press from Harbor Fright… So we will get to work soon on cleaning polishing and painting.

I forgot all about courtesy! Thanks for that research, I am going to get 8 new bolts then!

I have a spare diff in my storage unit, so I may have an extra set already...Thanks! I just wanted new ones... well, just because...

My only thing I have to source is the pressed in studs that need to fit into the output shafts that WCR sells. I could take the ones off my old Diff, but I would rather install new ones. Anybody know a source of said studs. thanks! parts should start arriving friday or monday.

Well truth be told an OEM stock 240Z really does not Need a LSD. I am not sure I even still need one with the sticky 205 rubber I am running on my car. But it is sort of part of the package, so I welcome it, but I am not sure it will be a dramatic difference. Also, this will finally give me an excuse to install my RT Zsonthebrain diff mount as well. So a lot of things are going to happen once parts start to arrive. Kudos to Todd at Wolf Creek by the way. Shipped it out the same day I orderd it. Great service.

I got the STR2.8b In fact the pic on his webpage is my engine!

Jeff G, Your points are valid, and perhaps I did not find the best solution, but I think a factory set up LSD form subaru (my favorite car company, so I am biased) may prove more robust than anything I can set up in my garage. HOnestly, I never even heard about OBX until right now. But I went with what makes me feel comfortable. I trust Subaru, I trust Wolf Creek Racing, and I trust myself to put those together.

It exists, but I am actually using a stock B type shifter in my car. I had to trim the OEM 71 console a bit, but it works wonderfully and you cannot tell I made the cuts.

Well I can start out with the 3.90 as it is, and then if it gets too bad, I can install a 5 speed. I already have the tunnel cut, and the console modified to accept the Type B. So it should be a breeze. Still I mostly just put around doing car shows locally within 20 miles. So it may not be too bad. The occasional track day as well. Still the new diff may make my dieing tachometer a bit more of an annoyance. Time will tell. I can see mostly good coming from this.

I am not sure buddy. I have not finished this mod yet. I have just ordered parts. UPDATE: Wolf creek half shafts are ordered and on the way. All parts should be here in about a week! When I get them installed I will see what kind of mileage I get Ray. But I bought this ratio with the intent on one day maybe putting in a Datsun 5 speed.

actually no it is not sir. The real reason is that my diff has leaky seals, and has always had a bit whine. I figured if I had a choice, I would love a LSD and a bit higher gear ratio (like an auto 240Z rear end). The STI rear diff and wolf creek half shafts sort of gives me a newer diff, with an LSD, and a higher gear ratio for a pretty decent price. Rebuilt Z diffs seem to go for about 900 bucks. I figured this is a viable alternative. I would NEVER put a V8 into my car. I love my datsun spirit L28. The STI rear diff is a 3.90, so it is not a huge step from my OEM diff. Plus if I ever get a 5 speed in there, it will work beautifully.