Stitebunny Posted January 31, 2013 Report Share Posted January 31, 2013 I have this 5 speed in my 510, standard shift pattern, and am trying to figure out what it is and may be from. It measures approximately 29 inches. I need a reverse light switch for it now and it would be useful info for the future! Thanks for any input. Quote Link to comment
Stupid_fast Posted January 31, 2013 Report Share Posted January 31, 2013 Post pics of the shiftier base. Remove the dust boot, ect. What engine? Looks almost like a C trans ??? Fill port is different from my B trans, and mine does not have those two bolts at the end. Quote Link to comment
Dat Lurka Posted January 31, 2013 Report Share Posted January 31, 2013 Sure is clean Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Its bolted to an L20B. Tried to get some pics of the shifter. Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 It's an FS5C71A.... very nice! Oh yeah. When the '70 240z came out and was raced, it unfortunately had a poorly geared wide ratio 4 speed and no 5 speed at all. In fact, in N America there weren't any 5 speeds for the S30 until '77. In Europe (I believe) there was a 5 speed available and many found there way to N America. The FS5C71A is a Roadster 5 speed and has a removable bell housing. It was easy enough for Nissan to cast an L bell for it and convert for use on the Z car. The synchronizers are Porsche steel servo type able to stand up to severe racing. Most transmissions are Warner type made of bronze. Theses L series FS5C71As were quite rare then and even more so today. Racing is hard on cars and the transmissions in them. These vintage legal transmissions are in great demand by racers who want to keep racing their vintage cars. Most parts for them are cast from pure unobtanium. The gearing is 1st.... 2.957 2nd... 1.858 3rd.... 1.311 4th.... 1.000 5th.... 0.852 Although there were two other Nismo Option boxes with Middle close ratio and Ultra close ratios. The reverse lamp switch is #32005-21000 I don't know if it's still available. Was on the 510 3 speed standard and 240z 4 speeds but only to '72 Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 I suspected it might be you with an answer! Thanks! What can you tell me about it?! I'll look for info about it myself too! I appreciate the help though! Quote Link to comment
datsunaholic Posted January 31, 2013 Report Share Posted January 31, 2013 Is it? I thoughts 71A gearboxes had removable bell housings. But that shifter does indicate a 71A, as that's the only 5-speed that used that style. Really, really rare. Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Interesting stuff..... Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Gears: 1.838, 1.388, 1.217, 1.0, 0.852 Can I assume this is in it? Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 http://www.zcar.com/forum/19-sale-parts-accessories/309161-rare-240z-5-speed-manual-transmission-fs5c71a.html The transmission in this link looks pretty similar I think. His says a middle-close ratio. So there are various gear sets it could have? And may have been changed at some point in it's life? Quote Link to comment
Stupid_fast Posted January 31, 2013 Report Share Posted January 31, 2013 It's an FS5C71A.... very nice! Oh yeah. When the '70 240z came out and was raced, it unfortunately had a poorly geared wide ratio 4 speed and no 5 speed at all. Strange, as the Fairlady Roadster before it did have a 5 speed box. In fact, in N America there weren't any 5 speeds for the S30 until '77. In Europe (I believe) there was a 5 speed available and many found there way to N America. The FS5C71A is an old Roadster 5 speed and has a removable bell housing. It was easy enough for Nissan to cast an L bell for it and convert for use on the Z car. Theses L series FS5C71Bs were quite rare then and even more so today. The gearing is 1st.... 2.957 2nd... 1.858 3rd.... 1.311 4th.... 1.000 5th.... 0.852 Wow... It could possibly be a NISMO competition box??? That is the closest ratios you can get for a 510 gearbox without a custom gearset. With 3.90 or 4.11's that should be a bit of fun. Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 Is it? I thoughts 71A gearboxes had removable bell housings. Doug if you look carefully you can see the gasket between the bell and the main case right near the reverse switch leads.. Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 Gears: 1.838, 1.388, 1.217, 1.0, 0.852 Can I assume this is in it? The gearing is 1st.... 2.957 2nd... 1.858 3rd.... 1.311 4th.... 1.000 5th.... 0.852 I believe the above is what came on the European S30 5 speed. (It may have been an option but this was what you got) These were available from Nismo and were available for racing. The mid close ratio gears are... 1st.... 2.678 2nd... 1.704 3rd.... 1.262 4th.... 1.000 5th.... 0.852 The ultra close ratio gears are... 1st.... 1.858 2nd... 1.388 3rd.... 1.217 4th.... 1.000 5th.... 0.852 Stitebunny It would be a bit of work but if you mark the driveshaft with chalk and raise the rear wheels off the ground and place in first gear. Then crank the motor over 10 times. The drive shaft will turn ... close ratio............... 3.38 times mid close ratio........ 3.73 times ultra close ratio....... 5.38 times Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Gotcha! Thank you! So now that I know it's fairly rare, am I going to have a hard time finding a reverse light switch?! Or might it share one with more common gearboxes? Also I was just looking through a service manual I got with the car and the previous owner had hand written in some numbers to figure the top speed at 7,000 rpm based on the gearing of the "240z speed" with a given rear end ratio He has gears: 1st 2.960 2nd 1.855 3rd 1.310 4th 1.000 5th .850 Possibly a rough estimate by calculating turns on the input shaft?? I guess next I'll see what rear end I have. This is a wagon by the way. And there was a spare rear end with the car also. Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 1st 2.960 looks like a rounded off 2.957 for sure. Quote Link to comment
wayno Posted January 31, 2013 Report Share Posted January 31, 2013 I am a little confused, how can you tell this is a rare roadster 5 speed from the common roadster 5 speed from the outside, I thought you had to look inside and check the synchros. Quote Link to comment
Stupid_fast Posted January 31, 2013 Report Share Posted January 31, 2013 Gotcha! Thank you! So now that I know it's fairly rare, am I going to have a hard time finding a reverse light switch?! Or might it share one with more common gearboxes? Also I was just looking through a service manual I got with the car and the previous owner had hand written in some numbers to figure the top speed at 7,000 rpm based on the gearing of the "240z speed" with a given rear end ratio He has gears: 1st 2.960 2nd 1.855 3rd 1.310 4th 1.000 5th .850 Possibly a rough estimate by calculating turns on the input shaft?? I guess next I'll see what rear end I have. This is a wagon by the way. And there was a spare rear end with the car also. Reverse light looks like the same one as on my ZX box. Should all be the same, I bought a new one for like $20. The part number should be around these forums somewhere. That's a nice gearbox, the shorter 5th is great for the track if you use it for that. Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 I am a little confused, how can you tell this is a rare roadster 5 speed from the common roadster 5 speed from the outside, I thought you had to look inside and check the synchros. Wayno I believe all 71A Roadster 5 speeds had the C 'competition' steel synchros in them. The common one would probably be the close ratio with the two other Nismo less likely Quote Link to comment
wayno Posted January 31, 2013 Report Share Posted January 31, 2013 Wayno I believe all 71A Roadster 5 speeds had the C 'competition' steel synchros in them. The common one would probably be the close ratio with the two other Nismo less likely How are you able to tell he has a rare one from the outside? I agree he does have the hard to find "L" bellhousing, but other than that being rare, how can you tell this guys tranny is a comp. one? I have this in my attic. Quote Link to comment
datsunaholic Posted January 31, 2013 Report Share Posted January 31, 2013 I didn't remember (or realize, I guess I've only seen 'em apart) that the bellhousing bolts are on the INSIDE. Wayno's has very different casting ribs... like a Roadster one, I think. One of the guys I know that rebuilds Roadster gearboxes has found either style synchos in the gearboxes. Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Thanks Stupid_Fast, I'll look around for a part number. Datzenmike, I'll give that a go when I have some time to do so. I'm more curious about it now! Quote Link to comment
Stitebunny Posted January 31, 2013 Author Report Share Posted January 31, 2013 Yes, the front part is quite a bit different. With mine having the ribs running around top to bottom also. 1 Quote Link to comment
datzenmike Posted January 31, 2013 Report Share Posted January 31, 2013 Wayno that is a 4 or 5 speed? [edit]All 71B 5 speeds were C competition steel synchros AFAIK. Look in the fill hole and look for brass. Here are pictures of steel synchro rings from a 71B tranny. To compare... . Quote Link to comment
datsunaholic Posted February 1, 2013 Report Share Posted February 1, 2013 As far as I know, most 71Bs had brass synchros. Any transmission with a "W" in the model code (FS5W71A) would be brass "Warner" type synchros. An FS5C71A would have Servo-type (sometimes called Porsche type) synchros, which are the steel ring servo type. They have a very different feel to them, but are VERY, VERY expensive to replace when they break. Some people mistaken the "S" for Servo type Synchros... the S indicated overdrive. Lack of an "S" means 1:1 top gear. The US got 5-speeds as an option in the 2000 Roadster, but the 1600 only had the 4-speed as far as I know. You could order a 5-speed conversion for a 240Z and 260Z from the dealer, but they weren't delivered as a factory option until the '77 model year. Quote Link to comment
wayno Posted February 1, 2013 Report Share Posted February 1, 2013 My 1867 roadster has a 1968 U20/5 speed in it, and I have this extra 5 speed in the attic, as far as I know, all the 2000cc roadsters came with 5 speeds. The 4 speed/R16 that came in my roadster had a flat bottom removable plate, as it did not split apart in the middle like the 5 speeds. I have always been lead to believe that you had to physically look at the synchros to know if you had a good one, as the transmissions are the same on the outside, but you started talking about how this guy has a competition gearbox by the photos, but maybe you know something I don't know that others that do know are not willing to tell me. Quote Link to comment
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