C.A.R. Posted July 10, 2010 Share Posted July 10, 2010 Hi all, I'm in need of a list of 1st to 5th gear ratios for the 260Z (71b) gearbox. Does anyone have an ACCURATE list? The ones I've found on the net have been horribly inaccurate... I'll update the info into the "What Gearbox's Fit" thread too Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted July 10, 2010 Author Share Posted July 10, 2010 Apprently the Ratio's are: 1st: 2.906 2nd: 1.902 3rd: 1.311 4th: 1:1 5th: 0.864 Rev: 3.382 Thanks to Dimitri & his awesome little book! Quote Link to comment Share on other sites More sharing options...
PeterAllen Posted July 10, 2010 Share Posted July 10, 2010 Slightly different to those stated in the Nissan Motor Corp 260Z Service Manual for Transmission type FS5C71B, published 1975. 1st 2.905 2nd 1.902 3rd 1.308 4th 1.000 5th 0.864 Rev 3.382 I don't know anything about it personally, just quoting the book. Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted July 10, 2010 Author Share Posted July 10, 2010 Thanks Peter! There's not much in it, in either case Quote Link to comment Share on other sites More sharing options...
Whittie Posted July 10, 2010 Share Posted July 10, 2010 I've got a tutorial to post as soon as I can find the pictures and put them on a server for fitting a 71c box and everything that is involved or not depending on the route you want to take. What exactly do you need the ratios for? If it's for a 71c conversion I can flick you a copy of the tutorial. It's about 11mb tho, so can't post up here, I'll need to convert to text friendly version Quote Link to comment Share on other sites More sharing options...
bluerat Posted July 11, 2010 Share Posted July 11, 2010 Other than a 240K 4 speed, they are the closest ratio's Datsun made in a factory box. Slipping in a 76 hey Lurchy? What you really need buddy is a LD crank if you want to go fast.... Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted July 11, 2010 Author Share Posted July 11, 2010 Whittie, we already have an article on that subject: http://www.viczcar.com/forum/index.php/topic,3210.0.html Hodgo, what ARE you on about? Quote Link to comment Share on other sites More sharing options...
bluerat Posted July 11, 2010 Share Posted July 11, 2010 LOL sorry, looks like I was way off target! I was talking cams and wanting to keep it on the boil... Quote Link to comment Share on other sites More sharing options...
haul Posted July 11, 2010 Share Posted July 11, 2010 This is what I got out of the book I have. Found this one , FS5W71B 260/ 2 seat 260/ 2+2 1st 2.957:1 2.906:1 3.321:1 2nd 1.857:1 1.902:1 2.077:1 3rd 1.311:1 1.308:1 1.308:1 4th 1.000:1 1.000:1 1.000:1 5th 0.852:1 0.864:1 0.864:1 rev 2.922:1 3.382:1 3.382:1 Tony Quote Link to comment Share on other sites More sharing options...
mossy Posted July 14, 2010 Share Posted July 14, 2010 Even though I've rebuilt a gearbox before like the rest of my mechanical knolwedge its very limited, thats where I'm confused about close ratios, I've got an early 71a gearbox which pretty much fells like its in neutral even though its in gear so I want something thats a lot closer together between gears, is this what a close ratio is or am I way off? Quote Link to comment Share on other sites More sharing options...
dat2kman Posted September 9, 2010 Share Posted September 9, 2010 This is what I got out of the book I have. Found this one , FS5W71B 260/ 2 seat 260/ 2+2 1st 2.957:1 2.906:1 3.321:1 2nd 1.857:1 1.902:1 2.077:1 3rd 1.311:1 1.308:1 1.308:1 4th 1.000:1 1.000:1 1.000:1 5th 0.852:1 0.864:1 0.864:1 rev 2.922:1 3.382:1 3.382:1 Tony Not quite, the list on the left is early 240 z 3 peice, also used in datsun Sports 2000's known as a 71A the list in the middle is early 260z known as a 71B the list on the right is late 260z, some 280ZX pretty well all 240k's, early Skylines, most L20b engined bluebirds etc, it has the big gap between 2 and 3 also known as a 71B there is a early 280zx box that has a 3.06 first, and some truck/commercial boxes have 3.59 first, this was done by altering the input drive/driven ratio gearset by a tooth or two. The later RB type boxes are the sameratio ( except fifth gear) as the later 71B box, but with internal differences for strenght and other shizz. Quote Link to comment Share on other sites More sharing options...
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