blue72 Posted January 11, 2009 Share Posted January 11, 2009 It seems to me that most likely this transmission is either: FS5C71-A: Fairlady Z (Long tail) Or it's one of these and has been adapted for use on the L Series engine: FS5C71-A: 2000 Sports AKA Fairlady Roadster (Short tail) F5C71-A: Nissan Competition Option 1 or Option 2 gearbox That doesn't mean that it isn't out of something else entirely though (like a C10 Skyline). Like has already been suggested twice, check the gear ratios. That's the only way you will be able to tell which it is. The other day I re-edited my last post to include the 5th gear ratios of each of these transmissions. Info is a little scarce for these transmissions, but it seems they all came with a 0.852 5th gear. Here's a good page I found with many Nissan transmission gear ratios available. http://www.gracieland.org/cars/techtalk/gearing2.html That's the best guess I have on what this transmission could be. soullessjdog will have to provide some more info before I could make any more educated guesses about his mystery gearbox. Quote Link to comment Share on other sites More sharing options...
Daeron Posted January 11, 2009 Share Posted January 11, 2009 If you get approximate drive ratios and cannot find any near match, I can check some of my uncle's roadster gearboxes for comparison.. Its kind of a cumbersome affair to do, though, so I would rather avoid tearing into all that if you can find comparable info online. Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted January 11, 2009 Author Share Posted January 11, 2009 i found the papers on the scca car the trans came out of the ratios are 2.956 2nd 1.857 3rd 1.311 4th 1.000 5th .852 Quote Link to comment Share on other sites More sharing options...
cafebaltimore Posted January 11, 2009 Share Posted January 11, 2009 It is not a competition gearbox, but a Non-US 5-speed. Pretty much the same thing as the later ZX tranny but the stick-shifter sticks up further back on the transmission. http://www2.zhome.com:81/ZCMnL/tech/GearRatios.html Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 12, 2009 Share Posted January 12, 2009 Yeah, with those ratios it's a plain jane non-US 5 speed. Not sure what they're worth unless you're restoring a Fairlady Z or you have nostalgia, especially as parts for the 'A' style transmissions are tougher to come by. Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted January 12, 2009 Author Share Posted January 12, 2009 ya i know but people still dont think ist a jdm trans but on my scca papers theres a number like identification number and its 531 and the trans has that number scorched on the bell housing. so i know it has to be true. now i need a buyer. Quote Link to comment Share on other sites More sharing options...
uwhusky89 Posted January 12, 2009 Share Posted January 12, 2009 PM sent. -Mike Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted January 12, 2009 Share Posted January 12, 2009 Hell, I've got one of these roadster 5 spds and newly rebuilt matching driveshaft (lengthened for the setback diff) that I'd like to part with. It came out of my 240Z that was modified many years ago using BRE/Interpart pieces in a shop in CA. I recently replaced it with a KA 5 spd conversion. Quote Link to comment Share on other sites More sharing options...
zzzzed Posted January 12, 2009 Share Posted January 12, 2009 I could not imagine a 240z with a 4 speed. Here in Australia they where all 5 speed or 3 speed auto Quote Link to comment Share on other sites More sharing options...
Daeron Posted January 13, 2009 Share Posted January 13, 2009 I could not imagine a 240z with a 4 speed. Here in Australia they where all 5 speed or 3 speed auto ...just, don't use fifth. I had a clutch master and slave both go bad on mine a few months before my fire. I replaced the master with a cheap part, and didn't compare them as closely as I should have. When I finished the job, the clutch would not fully disengage. In the end, I swapped a used master out of another car into mine and it worked great; something was different in the linkage bar. However, on the way to ruling that out (because I DID compare the old versus new, apparently just not enough?) we swapped in a four speed trans that we were able to get our hands on for free. (A friend had it, but we had given it to them in the first place.) So, when the trans didnt fix it, eventually the clutch master did.. but by this time I had had my car down for about a week and it was a DD; no time to put the fivespeed back in. so I got to drive around the fourspeed for several months, and I never really DID get 100% out of the habit of trying to shift into fifth. It REALLY makes you feel like you're driving an antique. Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 14, 2009 Share Posted January 14, 2009 Thing is all the five speed cars came with 3.9's instead of the US Spec 3.36 gears. Driving a non-US spec car is like driving someone's car from here that has already upgraded the differential. The Four Speeds outside the USA came with a 3.7 gearset. Still better than the 3.36. Fairlady Z's with those little Buzzy 2 liters? Anything was available from 3.7 to 4.38 STOCK! Woo Hoo! Proper Gearing for the Engine's Operational Torque Curve! Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted January 14, 2009 Share Posted January 14, 2009 My 240Z has an early Nismo R180 LSD w/ 4.10:1 r&p to go with the roadster 5 speed. It is definitely zippy with that combo. When I fitted the KA conversion the shifter lined up perfectly with the tunnel hole just like the early 5 speed did. I only had to modify the trans mount. Quote Link to comment Share on other sites More sharing options...
cafebaltimore Posted January 14, 2009 Share Posted January 14, 2009 On Post #10 look at the first picture; If you put a 260z Type B transmission into a 1970 240z (that had type A) the shifter ends up moving forward (most people trim hole for shifter). If you put a Type A 240z transmission into a 260z, why didn't the shifter end up moving towards the rear? Do I have something backwards? Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 14, 2009 Share Posted January 14, 2009 Because the hole is in a different place on a 70 260Z than in a 74 260Z , plus the shifter rod is not straight, but curved. Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted January 14, 2009 Author Share Posted January 14, 2009 it did move back farther than my 4- speed. my 4- speed had a duel bend shifter to put it in the center. and on my engine mounts are custom made to fit the trans my motor mounts moved my engine forwards a little. Quote Link to comment Share on other sites More sharing options...
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