FJ20_S12 Posted July 20, 2009 Report Share Posted July 20, 2009 how hard would it be to get an S12 FJ20E transmission into an 81 Datsun 210 (Datsun Sunny B310) I have three extra FJ20 transmissions(motors are shot at the moment) and one LHD FJ trans has anyone tried getting one of these into a B310? what about getting an KA24/SR20 trans in? I'm not partial to the A-series motors and would be willing to swap if it were easier, i just want to get away from the 3spd autotragic that is in the car and Ive tried looking for a stock 5speed for it, impossible to find for me... thanks tim Quote Link to comment
ggzilla Posted July 20, 2009 Report Share Posted July 20, 2009 B310 is same platform as A10 (1978-1981 Datsun 510) I suspect the tunnel is the same size, so 71-series transmissions will perhaps fit. You will want a "stubby" (short) transmission so the shift comes up in the stock hole, and you can use the stock B310 auto driveshaft. Quote Link to comment
datzenmike Posted July 20, 2009 Report Share Posted July 20, 2009 The A14 came with an F4W60 4 spd. and an optional FS5W60 5spd. The 5 spd. was a dogleg before '80 and regular pattern after. I don't believe an FS5W71B tranny was ever mated to the A series motors so there won't be any out there. If you want a 5spd you will have to swap a motor and 5spd. tranny into your 210. A '77-'79 200sx w/ L20B and FS5W63 dogleg 5spd. would be 'close'. It has a short length, around 26", and the tranny is physically smallish and might fit your tunnel. If your automatic is 26" long you could use the same driveshaft as long as the spline size is the same. A KA/SR motor and tranny is iffy. As far as the tranny, the FS5W71C is L O N G at over 33" (D-21) or 35" (S-12). (give or take) I assume the FJ20E transmission is an FS5W71C like the KA?? Can you post a few pictures of it??? Quote Link to comment
FJ20_S12 Posted July 20, 2009 Author Report Share Posted July 20, 2009 (edited) i think that the point i want to go to an FS5W71C is when i would go KA/SR/FJ, which right now all i want to do is drive the crap out of it and get every MPG that i can squeeze out of it, ill worry about performance later if i get board of my 500hp FJ20 S12 :D(still being built... slowly lol.) Wonder what I'd have to do to get it to the "MPG" version status, the one that got 56mpg back in the day... I don't know how long the transmission are, but i could possibly find a 71C out of an S12(came in the SEv6 and some l4 models) which I know is shorter than the one in the 240sx, which also makes me think that they might fit, id just have to find a b310 bell housing(which means i should probably stick to finding an entire trans instead) the FJ trans is a 71B trans, same thing out of a 280ZX, DR30 Skyline and the MKI S12s. heres a pic from someone with a Btrans, maybe that might provide more info so what your saying is that the automatic motor/trans share the same bolt pattern and the 5speed/trans motor share a different pattern? thats teh gayz... also, i haven't found anything on the "A10 510", apparently production was 67-73 or something like that Edited July 20, 2009 by FJ20_S12 Quote Link to comment
datzenmike Posted July 20, 2009 Report Share Posted July 20, 2009 i think that the point i want to go to an FS5W71C is when i would go KA/SR/FJ, which right now all i want to do is drive the crap out of it and get every MPG that i can squeeze out of it, ill worry about performance later if i get board of my 500hp FJ20 S12 :D(still being built... slowly lol) I don't know how long the transmission are, but i could possibly find a 71C out of an S12(came in the SEv6 and some l4 models) which I know is shorter than the one in the 240sx, which also makes me think that they might fit, id just have to find a b310 bell housing(which means i should probably stick to finding an entire trans instead) the FJ trans is a 71B trans, same thing out of a 280ZX and the MKI S12s what your saying is that the automatic motor/trans share the same bolt pattern and the 5speed/trans motor share a different pattern? thats teh gayz... wonder what id have to do to get it to the "MPG" version status, the one that got 56mpg back in the day... also, i haven't found anything on the "A10 510", apparently production was 67-73 or something like that First the A14 was out of production by the time the FS5W71C was built so there are no A series front cases that will fit the C type tranny. There won't be any B type either. A 71 tranny won't bolt to the A14 motor. Second, the automatic bolt pattern for your A series motor in the 210 is the same as the 4 and optional 5 speed tranny for that car. The only 4 and 5 speeds that will fit the A series is the F4W60 and the FS5W60 and possibly an FS5W63 tranny. That's as large as they went for such a small powered motor. Third, the D-21 Hardbody truck with Z24i and KA motors (maybe the VG 6s) had the shortest FS5W71C type tranny around 33" with the S-13 slightly longer: http://i138.photobucket.com/albums/q251/datzenmike/Tranny/S-13andS-12MKIICtypes.jpg[/img]"] Converting to a standard is a lot of work and parts. Even a 4 spd. would be better than the auto. You should also swap in a lower gear standard tranny rear end to lower top speed revs. There are some 3.545 in some 210s out there which is far lower than the auto 3.889 ratio. Quote Link to comment
Pedro Posted July 21, 2009 Report Share Posted July 21, 2009 It can be done but not without custom bellhousing or cutting 1 fj bell & 1 A series bellhousing. A guy in NZ put a sr20 6speed behind his A15 this way. Quote Link to comment
ggzilla Posted July 21, 2009 Report Share Posted July 21, 2009 (edited) I figured he was swapping in the FJ engine too ... A10 is 1978-1982 "Datsun 510". Called Stanza in Japan. It has the short tail 63-series 5-speed for L16/L20 engine. The engine bell housing bolt patten is the same auto/manual. L-series, A-series have different bolt pattern. Manual do not have a separate bell housing, but automatics do. So some guys cut the front case of a 5-speed and weld on a modified auto bell housing. But that is pointless with the FJ engine, because you have FJ 5-speeds. The B310 has a large tunnel, designed for the 63-series and JATCO automatic. Even the tiny tunnel in a B110 fits the 63-series, but is a tight fit with not enough room for the reverse switch. The short-tail 63-series 5-speed is direct bolt in to B310, using stock (auto) driveshaft. * A-engine with 63-series 5-speed (only available in short tail version) * L-engine with 63-series 5-speed (short tail, not long tail) the A14 was out of production by the time...Last I checked in 2007, the A14 was still in production. But there's no reason the 71-series transmission would have been fitted. Even the 63-series is too strong for A14 use. Nissan first fitted the 63- 5speed to the B210 with A14 because that's all they had, then hurriedly designed the 60-series 5speed in time for B310. It's a lot lighter, and tough even behind the A14 and A15. Edited July 21, 2009 by ggzilla Quote Link to comment
datzenmike Posted July 21, 2009 Report Share Posted July 21, 2009 Those crazy Auzzy's. (I meant Kiwi's) In their defense, they do manage some power out of their A series motors and maybe a C type is needed. For a stock A 14/15 an S10 dogleg would be overkill. Quote Link to comment
ggzilla Posted July 21, 2009 Report Share Posted July 21, 2009 Nah, even Kiwis don't make that kind of torque from an A-engine. Aussies do swaps of Toyo and other gearboxes becuase the A-series 5-speed gearboxes sell for $1500 used in Australia. Otherwise they would use the 63-series 5-speed from B210 on their supercharged/turbo engines if they want something strong enough. But strong and cheap...supply and demand. Quote Link to comment
daily driver Posted August 14, 2009 Report Share Posted August 14, 2009 71C Short, 71C long, and 71B like behind an FJ20. Quote Link to comment
ggzilla Posted August 14, 2009 Report Share Posted August 14, 2009 Is that 71-B 26.5 inches long? If so it is the right length for factory A10/B310 auto driveshaft. But the 71-c Short looks like it has the correct shifter location for a B310. Quote Link to comment
daily driver Posted August 14, 2009 Report Share Posted August 14, 2009 Both the 71C short and 71B should have the same shifter location, give or take a little. The 71B I have behind my FJ20 measures out at around 33". I think the early D21 71C had a shorter trans like you are looking for, but don't quote me. I've only started looking into this to replace my 71B with a better box rather than rebuild it. Was looking for a 200SX short "C", but now looking for an RB20 box...;) Quote Link to comment
daily driver Posted August 14, 2009 Report Share Posted August 14, 2009 Here is the shorty pickup trans. So there are 3 length’s from what I’ve found. This short 26'ish one, the 33'', and the 35'' like comes in the 280z and S13,14. Still learning though..;) Quote Link to comment
datzenmike Posted August 14, 2009 Report Share Posted August 14, 2009 (edited) The FS5W71'B' were almost all 31.5" long. I do have a 'B' that is 26.3 but it has a Z series 'bell' on it. I believe there are only two lengths. The 280z only used the 4 and 5 speed B type that were 31.5" The zx used only the 31.5" 5 speed and the zx turbo used the T-5 which was slightly longer but I doubt it was 35". The '86.5-'90? D-21 Hardbody used a shorty 'C' type but they are still just slightly longer than the B type at around 33' I think. BTW.... Nice pictures of the trannys daily driver! This has a removable bell?? What's it off of??? Edited August 14, 2009 by datzenmike Quote Link to comment
daily driver Posted August 15, 2009 Report Share Posted August 15, 2009 That picture is supposed to be an early D21 box. The thing that makes comparing measurements of the "B" and "C" hard is that they differ on the tail shaft. The "C" has the driveshaft sleeve on the transmission and the "B" has it on the DS. I guess a measurement to the shifter pin would be more accurate in most cases. Or maybe to the rear mount?? :confused:My Skyline trans is 750mm to the shifter pin. Quote Link to comment
Duncan Posted September 6, 2009 Report Share Posted September 6, 2009 and Ive tried looking for a stock 5speed for it, impossible to find for me... thanks tim Where are you located? Quote Link to comment
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