Wingzero Posted April 28, 2020 Report Share Posted April 28, 2020 What's the length difference between the 5 speed short tail and 5 speed long tail transmissions? The plan is to swap a L20B with a 5 speed into my Roadster. Quote Link to comment
wayno Posted April 28, 2020 Report Share Posted April 28, 2020 Short shaft is 26", and the long shaft is 31 inches, there is 5" difference. Quote Link to comment
wayno Posted April 28, 2020 Report Share Posted April 28, 2020 Mike is correct, short shaft is 26" and the long shaft is 31.5" Quote Link to comment
Wingzero Posted April 28, 2020 Author Report Share Posted April 28, 2020 Awesome! That's not bad at all. I can live with a 5.5" difference. The price difference for the short tail and long tail is crazy these days. I ended up going with the long tail and saving me $$$ Quote Link to comment
Wingzero Posted April 28, 2020 Author Report Share Posted April 28, 2020 Of course that $$ saved goes right back in to the project in other areas.... lol Quote Link to comment
wayno Posted April 28, 2020 Report Share Posted April 28, 2020 I do not recall how long the 5spd is in the Roadsters, but I know it is shorter than the 4spd, but I am suspecting your going to have to do some modifying unless you have a 4spd shifter plate setup for the later Roadster. I have a 1967 Datsun Roadster with a 1968 2000/5spd, I drove the shit out of that car in the 90s and early 2000s, I likely put a 100,000 miles on it myself back then, I still have it to this day. Quote Link to comment
datzenmike Posted April 28, 2020 Report Share Posted April 28, 2020 720 diesel 5 speed over Roadster 4 speed. Other than the placement of the starter the roadster 4 speed appears to be the same as the long F4W63 used only in the 610. 610 F4W63 4 speed. Basically a 510 4 speed only longer. wayno is right, the 71B 5 speed does look a hair shorter. . Quote Link to comment
wayno Posted April 28, 2020 Report Share Posted April 28, 2020 You don't understand Mike, he has a 1969 Roadster that had a 2000cc engine(U20), I expect the transmission was a 5spd, the 5spd is shorter than the 4spd, don't know how much shorter as I didn't think about that kind of stuff back then, my guess would be 3 or 4 inches shorter. I mentioned the length because I am pretty sure the 1969 Roadster with a 1600cc(R16) engine had a 4spd, and they would have the shifter plate/console to relocate the shifter hole towards the rear to accommodate the longer 71B long shaft transmission. Since it is a 1969 I expect he will not have to do any tunnel bracket cutting like I had to do to install a U20/5spd in my early 1967 Roadster, but a tranny mount might need to be made, I would find someone that has already done this and pick their brain, I am positive there is a build thread somewhere that has the info, them guys are using diesel cases so they can use Z car 5 speeds in there Roadsters so they know what the tranny mount mods are. Quote Link to comment
datzenmike Posted April 29, 2020 Report Share Posted April 29, 2020 FS5C71A same as the one above but this is the European 5 speed available with a removable L series front bell for use on the 240z for road racing. North America did not get these but you could buy one from Europe for your L powered Z car. Both had a flange output just like the 521 and has the starter on the right. Looks to be about 31.5" long Had to dig deep into my trove of tranny pictures I blew it up and it's around 31"? Can't tell if it's clipped on the front or not. The first 71B (F4W71B) was the September '71 240z and was only a 4 speed until August '76 1 Quote Link to comment
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