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Quick question hoping for a quick answer because i cannot find anything about this through a good deal of searching I have an STI clutch type R180 diff with a 4.44 gear ratio and i'd like to swap in my ratio from the original 1972 Datsun R180 3.364 (possible 3.545, but need to confirm) is this possible without any modification? I am getting really annoyed with my 70mph 3300rpm cruising speed, and the terribly short gear ratio.
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Been working on power steering. I decided on a 2004 Subaru WRX steering rack. I did some measuring to make sure everything would work. First I needed to figure out how much to cut off the steering rod. In steering, the pivots are the key to getting it to handle correctly. The stock pivots on the 240z steering rack is 616mm. The WRX rack is about 634mm. Some individuals use older Celica inner tie rods with the stock Subi outers to get everything to fit, but my rack is the "late" Subi rack. The threads are larger, M16 x 1.5, on the "late" Subi rack and the Celica rods didn't fit. I did some online research and found that 2000 Hyundai Sonata rods had the correct length and thread. The added bonus is that the inside of the Hyundai rods are vented and stepped to allow for more steering angle without shortening the outer tube of the steering rack. The step did have a lip that had to be ground down though. The step on the Hyundai rod is 5mm which adds 10mm on the travel on the steering. So, while I cut 18mm of the rod, it reduced the travel by 8mm. Stock 240z travel is 120mm, Subi is 132mm. Now the travel is around 124mm because the measurements are not perfect. So I added a little travel, hopefully it doesn't bind the steering knuckles. Here is a picture comparing the shortened Subi rod vs. the 240z rack. The final measurement was 576mm for the steering rod. Then I mounted the subframe on the engine to check clearances . In this swap, the engine mount perch has to be clearanced to make room for the angle of the Subi steering shaft. Also, the subframe has to be clearanced for the rotary valve and lines. Also checked the clearances with the A/C compressor mounted and to plan the pressure line. I cut the end of the steering shaft off to weld the Subi U-joint to the 240z steering shaft. I just shaved the weld and pulled the shaft out the Subi joint and the 240z shaft diameter was exactly the correct diameter to push inside and weld. I think it looks better that the stock Nissan weld, and that lasted 45 years. Hope I didn't cook the grease out of the joint when I welded it. There wasn't much smoke, so I think I am good. The stock Subaru rod ends ended up only having about 12mm of thread engagement when the alignment was roughed in and I wanted more. I did some research and figured out that 2003-2009 Mazda 6 tie rod ends are 7mm longer than the WRX ends. They are curve and have a left and right though. The taper on the stud seemed to match the original Datsun rods as well. Now I have plenty of thread engagement. I used compression fittings to move the hydraulic lines to where they would fit around the subframe. They worked out well and only one needed to be tightened up. They are 1/4 inch fittings. This is how much I had to cut out of the subframe. Metal was added to strengthen the subframe. If the engine mount becomes a problem, then I will gusset it. I used the RB25 (R33 non HICAS) pump, which is the same as most 240sx pumps. I built the pressure line out of -6AN Fragola PTFE hose with a M16 x 1.5 banjo metric adapter and the M14 x 1.5 power steering fitting for the rack. I did kinda skimp on the reservoir though and will switch it with an OEM style later. I used a 120 degree end on the rack side so it will clear the A/C pump later. Should have used a 150 degree though. The feel is great and feels about as a power steering car should. I dont have too many bumpy roads around here, so I cant fully test for bump steer. Havent felt any yet and we do have some railroad crossings that I have tried. There arent too many curvy roads either, but parking lots seem to be way more tolerable. The steering ratio seemed to stay about 2.7 and without a degree wheel to measure it, will stay "about". If there are any questions, let me know and I will ad them in the first post to help keep everything together.
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Hey guys, need some help with a little issue I have been encountering, and havent really come across a answer in the search section SPECS early 260 w/ sr20det light to mild mods(stock turbo) suby 2004 3.9 lsd rebuilt 240z axles wolf creek racing axle adapters MY BACKGROUND degree in automotive science six years working for Benz as a master tech ISSUE: popping noise & vehicle hops in tight turning reverse, forward motion turning, or taking off(normal load driving) breaking u joints HISTORY About seven months ago I decided it was time to replace the stock 260z diff after blowing up its guts, After much research I picked up a 04 suby lsd off ebay used, had the diff rebuilt at known shop(seals , pinion and ring gear replaced), and installed it into my 260z using wolf creek racing axle adapters and stock 240z half shafts with new u joints. The diff was filled with motul 90pa, fluid specifically made for that diff. After being proud of my swap, it was off to testing the diff out and performed the break in procedures including the 20 or so mile drive with letting the diff cool to harden the metal. Everything seemed ok, but after 50 miles I started to notice a clunking/popping noise coming from the rear end & and the whole car would hop(during clunking noise) as if you were driving with a flat tire. This would happen when reversing down hill from my drive way and turning, or making forward turns from a stop, or when starting to move under low/normal load, or making large 180 degree freeway off ramps turns. When I inspected the diff I found the side seals leaking oil, and wondered if their was something wrong with the rebuild. I took the car back to the diff shop, who actually started yelling at me and swearing when I told them the car wasn't right and I wanted them to check it out. I asked them to inspect not just the diff, but the drivetrain for binding. Before the rebuild the shop was told to spend extra attention to the clutch's, due to the cost of replacing clutches vs just picking up a new diff. Talking with the diff shop about the problem, I asked again about the clutches, turns out they did not torque test the clutches or test the clutch adjustment, just visually looked at them and demand them ok. After a week at the shop, it was time to pick up the car. the shop said they drove the car all over and said the noise was due to no lsd additive and the wrong fluid. I showed him the suby recommended fluids and the motul site indicating that it wasn't needed, and he basically told me to GTFO and that he was perfect. Leaving the shop, heading home, within 20 miles, the diff starting popping around the corner and I lost the passenger side half shaft at the inner U-joint. The car ended up sitting for a month or two due to my schooling and work demands keeping me out of the garage. Last week I finally found time to swap the axle with a spare one I had laying around. The car seemed to drive ok for about 15 Miles, until I reversed out of a parking space making a corner....then the infamous popping noise came back. You can spin the tires free hand in the air, and you feel light resistance then a little moderate then light again, but I think thats just from the brakes(doesnt look like the axles causing it) MY THOUGHTS: I don't know if the clutches are causing the wheels to lock up and cause this issue, but that seems kinda unlikely. I am leaning more to an issue with the axles coming out of the diff at to much of a angle causing them to bind when rotating. The adapters seem to stick out a little far for my liking, but I have not seen a photo of them installed on another car to see if this distance is normal. However other people run this set up and haven't mentioned this concern. I would love to swap the axles out to cv joints, but have not found a shop that builds custom axles( I want the axle to have a suby inner to eliminate the adapters and reduce the angle), and honestly I'm pretty over spending a crap ton of money on this thing(I'm a paramedic student, poor as hell lol). I am also reluctant to spend over a grand on axles, knowing that this may not fix my issue....sooo hard to justify that one just yet. CALL TO ARMS!: This whole situation sucks, I spent days swapping the motor, and building the car, and now this issue, ugh. I'm ready to kick this car to the curb, but before my last straw breaks, I am humbly requesting assistance. Any ideas would help, any experience with this swap, any pictures of adapters installed, ect. I am located in the bay area and the only real rear end shop near me happens to be the one that told me to GTFO. I can try and get pictures or a video over the next few days if that will help anyone whos interested in this challenge. -
Finally found a good price on a Subaru R180, so now I need the stub axles to go with it. I can't quite afford to pay more for the two pieces of metal than I did for the whole differential shipped. So, whoever is reading this, what kind of deal can you make me? New or used, doesn't matter if the price is decent. I would even be willing to take a "good customer discount" on new ones straight from Todd himself at Wolf Creek for the $200 work of jets I bought this summer I just need the parts and $500 is too much!!
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From the album: Subaru Rack For Sale
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From the album: Subaru Rack For Sale
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From the album: Subaru Rack For Sale
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From the album: Subaru Rack For Sale
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From the album: Dirty Impreza
Took the Sti offroading, doesn't look as dirty in the pictures as it actually it is! -
From the album: Dirty Impreza
Took the Sti offroading, doesn't look as dirty in the pictures as it actually it is! -
From the album: Dirty Impreza
Older pic of the STI after some muddy doughnuts! Mudflaps work suprisingly well! -
From the album: Dirty Impreza
Older pic of the STI after some muddy doughnuts! Mudflaps work suprisingly well!
