The 71 series gearbox is a heavy mother but with a cut
and shut or adaptor plate for the A series Im sure many
would not complain.

I personally would like the 71 box for strength and also
I heard there is a 4 speed any idea on this? FS4W71

That would make an awesome and lighter gearbox if you can
fit 1st - 3.32 , 2nd - 2.07 , 3rd - 1:1 & 4th - 0.83
instead of
910 - FS5W71B - same but unique ratios ie 3.32 , 2.07 , 1.31 , 1 , 0.83 , alloy
forks , all Warner syncros .

http://www.trannybuilder.com/store/product.php?productid=5864
https://www.trannybuilder.com/store/pr ... uctid=5865&cat=0&page=520

I cant find any of the ratios for the FS4W71 anyone have them?

I just think the 4th speed is useless when most of the engines
transplanted for extra oomph really require a taller final.

some further info from another forum,....
**
200b is type 63 Basically just a 180 box the one most need is the type 71 being the strongest box we can easily use.
Obviously 71mm between shafts and hence bigger stronger gears.
Type 71 cane as 240 260Z with Porsche servo syncro very expensive to fix.
240K or Skyline with cheaper and effective Borg warner brass type syncros.
ratios varied in type 71 from Z box with 2.9 1st
240K/Skyline/bluebird with3.3 1st - 240/260 C and Z18 Turbo 3.6 1st
You can change the ratios between the 3.3 and 3.6 box by swapping the Input gear sets as this is the only difference.
Z box has the nicest ratio with that 2.9 1st but lousy syncros.These can however be swapped over to the Borg Warner brass syncros by pressing the syncro hubs off the relevant box and swapping them.
Oddball one is the later skylines which had either a short 1600 length type 71 box(no shortening propshafts) or the later FJ or RB box which can be used by just changing the front housing to suit your engine type.
Most of the older people probably know this but we all too often Assume everyone knows about this stuff.This is for the benefit of the newer guys we need more of them. Steve

Why not just use the 71-series 5-speed? They are quite common being fitted to all the trucks.

ive got a 4 speed sitting around for L series, but they are similar stumpy kind of 4 speed.

cant say ive ever heard of a 71 series 4 speed. all the L series 4 speeds ive seen have been a completely different design to the 71 series

nah i meant use the 4 speed instead of s 71 series if he wants a 4 speed.

Mick is that a 63a 4 speed? should be on the case.
Ive though also of using the 180b 4 or 5 speed

Also alot of folks would like a stronger box for their A series
with an overdrive.

I love the old 3 speed a series gbox because 3rd was 1:1
In a 4 speed it would be great to have 3.38,1.7 or 1.8, 1 and 0.7/0.8
this would make a lightweight and versatile box for torquey motors
in lightweight cars.

The 63a 4 speed I havent seen for a while compared to 63 5 speeds and
the 71a 4 speed is rare compared to 5 speeds.

For my ca18 turbo I would like the mentioned ratios in a lighter box if possible.

yeah 63 series 4 speed

210 and B210
4 cyl 1.2L F4W60 79-82 4spd, RWD, smooth alum. case, rear load
4 cyl 1.3L F4W60 73-74 4spd, RWD, smooth alum. case, rear load
4 cyl 1.3L F4W56A 73-74 4spd, RWD, webbed alum. case, rear load
4 cyl 1.4L F4W60 73-82 4spd, RWD, smooth alum. case, rear load
4 cyl 1.4L F4W56A 73-77 4spd, RWD, webbed alum. case, rear load
4 cyl 1.4L FS5W60L 76-78 5spd, RWD, FS5W60L, reverse shift pattern
4 cyl 1.4L FS5W71C 79-82 5spd, RWD, standard shift, alum. case,
240Z
6 cyl 2.4L F4W70B 70-73 4spd, RWD, alum. case, removable bellhousing, rear
260Z
6 cyl 2.6L F4W70B 74 4spd, RWD, alum. case, removable bellhousing, rear load
6 cyl 2.6L F4W71B 74 4spd, RWD, integral alum. case and bellhousing, rear load
280Z
6 cyl 2.8L F4W71B 75-78 4spd, RWD, integral alum. case & bellhousing,
6 cyl 2.8L FS5W71A 77-78 5spd, RWD, alum. case, rear load
280ZX
6 cyl 2.8L F4W71B 79 4spd, RWD, integral alum. bellhousing & case
6 cyl 2.8L FS5W71A 79-80 5spd, RWD, alum. case, rear load
6 cyl 2.8L FS5W71C 80-83 5spd, RWD, alum. case, rear load
6 cyl 2.8L FS5R90A 82-83 5spd, RWD, T5, cast "1352", alum. top
300ZX
6 cyl 3.0L FS5W71C 83-87 5spd, RWD, alum. case, rear load
6 cyl 3.0L FS5W71C 87-89 5spd, RWD, alum. case, rear load
6 cyl 3.0L FS5R30A 89-96 5spd, RWD, rear load, alum. case
6 cyl 3.0L FS5R90A 84-86 5spd, RWD, T5, cast "1352", alum. top
6 cyl 3.0L FS5R30A 86-89 5spd, RWD, rear load, alum. case - Turbo
310
4 cyl 1.4L F4WF60A 78-80 4spd, FWD,bottom pan N/A
4 cyl 1.4L FS5WF60A 78-80 5spd, FWD,bottom pan N/A
4 cyl 1.5L F4WF60A 80-81 4spd, FWD,bottom pan N/A
4 cyl 1.5L FS5WF60A 80-81 5spd, FWD,bottom pan N/A
411
4 cyl 1.3L F4W63 65-67 4spd, RWD, bottom pan
4 cyl 1.6L F4W63 65-67 4spd, RWD, bottom pan
510
4 cyl 1.6L F4W63 67-73 4spd, RWD, bottom pan
4 cyl 1.8L F4W63 78-81 4spd, RWD, bottom pan
610
4 cyl 1.8L F4W63 72-73 4spd, RWD, bottom pan
4 cyl 2.0L F4W63 73-76 4spd, RWD, bottom pan
TRUCK 520 SERIES
4 cyl 1.3L F4W63 66-72 4spd, RWD, bottom pan
4 cyl 1.6L F4W63 69-72 4spd, RWD, bottom pan
TRUCK 620 SERIES
4 cyl 1 .6L F4W63 72-73 4spd, RWD, bottom pan
4 cyl 1.8L F4W71B 73-74 4spd, RWD, rear load, no bottom pan
TRUCK 720 SERIES
4 cyl 2.0L F4W71B 74-84 4spd, RWD, rear load, no bottom pan
4 cyl 2.0L F4W71B 80-83 4spd, 4WD, rear load, no bottom pan
4 cyl 2.0L FS5W71A 74-80 5spd, RWD, alum. case, rear load
4 cyl 2.0L FS5W71C 82-84 5spd, RWD or 4WD, alum. - 60mm O.D.
4 cyl 2.0L FS5W71C 84-85 5spd, RWD or 4WD, alum. - 61 mm O.D.
4 cyl 2.2L F4W71B 80-82 4spd, RWD, rear load, no bottom pan
4 cyl 2.2L F4W71B 80-82 4spd, 4WD, rear load, no bottom pan
4 cyl 2.2L FS5W71C 80-82 5spd, RWD or 4WD, alum. case, rear load- 60mm O.D.
4 cyl 2.4L F4W71B 82-83 4spd, 4WD, rear load, no bottom pan
4 cyl 2.4L FS5W71C 82-84 5spd, RWD or 4WD, alum. case, rear load- 60mm O.D.
4 cyl 2.4L FS5W71C 84-86 5spd, RWD or4WD, alum. case, rear load - 61mm O.D.
4 cyl 2.5L F4W71B 83 4spd, 4WD, rear load, no bottom -DIESEL pan
4 cyl 2.5L FS5W71C 83-84 5spd, RWD or 4WD, alum. case
4 cyl 2.5L FS5W71C 84-86 5spd, RWD or 4WD, alum. case, rear load- 61 mm O.D.

F4W71A
240Z
1st 3.549:1
2nd 2.197:1
3rd 1.420:1
4th 1.000:1
Rev 3.164:1

F4W71B
260Z
1st 3.592:1
2nd 2.246:1
3rd 1.415:1
4th 1.000:1
Rev 3.657:1

280Z
1st 3.321:1
2nd 2.077:1
3rd 1.308:1
4th 1.000:1
Rev 3.382:1

FS5C71A Porsche
240Z/260Z
1st 2.957:1
2nd 1.857:1
3rd 1.311:1
4th 1.000:1
5th 0.852:1

260Z 2+2
1st 2.906:1
2nd 1.902:1
3rd 1.308:1
4th 1.000:1
5th 0.864:1
Rev 3.382:1

FS5W71B
280Z
1st 3.321:1
2nd 2.077:1
3rd 1.308:1
4th 1.000:1
5th 0.864:1
Rev 3.382:1

84-86 S12
1st 3.592:1
2nd 2.057:1
3rd 1.361:1
4th 1.000.:1
5th 0.821:1
Rev 3.657:1

FS5W71C
1st 3.321:1
2nd 1.902:1
3rd 1.308:1
4th 1:000:1
5th 0.759:1
Rev 3.382:1


CA20e:
1st:3.321
2nd:1.902
3rd:1.308
4th:1.000
5th:0.833

CA18et:
1st:3.592
2nd:2.057
3rd:1.361
4th:1.000
5th:0.813

According to my 86' Nissan U.S service manual. The S12 FS5W71C has two different ratios:
CA20e:
1st:3.321
2nd:1.902
3rd:1.308
4th:1.000
5th:0.838

CA18et:
1st:3.592
2nd:2.057
3rd:1.361
4th:1.000
5th:0.821

May help; 89' Nissan 240SX FS5W71C:
KA24e:
1st:3.321
2nd:1.902
3rd:1.308
4th:1.000
5th:0.759

For the 71B and 71C model trannys with a different 5th gear ratio and all other ratios remaning the same it is nothing more than a simple gear change.
5th gear is a seperate bolt on set and not dependant upon the cluster set of the first 4 gears.

Weight
71B 63~lbs
71C 100~ lbs

Datsun/Nissan Transmissions

MANUAL

Trans Type 1st 2nd 3rd 4th 5th other Reverse *Notes*

4sp RWD

F4W63L 3.382 2.013 1.312 1.000 -.--- -.--- 3.365 *710*
F4W71A 3.549 2.197 1.420 1.000 -.--- -.--- 3.364 *240Z*
F4W71B 3.382 2.077 1.308 1.000 -.--- -.--- 3.382 *240Z/810/Maxima/620*
F4W56A 3.757 2.169 1.404 1.000 -.--- -.--- 3.640 *B210/210*
F4W60L 3.513 2.170 1.378 1.000 -.--- -.--- 3.764 *210*
F4W63L 3.382 2.013 1.312 1.000 -.--- -.--- 3.365 *510*
F4W63L 3.657 2.177 1.419 1.000 -.--- -.--- 3.638 *510 Optional*

5sp RWD

FS5W60L 3.513 2.170 1.378 1.000 0.846 -.--- 3.464 *210/510*
FS5W63A 3.382 2.013 1.312 1.000 0.854 -.--- 3.570 *S110/610/510*
FS5W71B 3.321 2.077 1.308 1.000 0.833 -.--- 3.382 *S12*
FS5W71C 3.321 2.077 1.308 1.000 0.864 -.--- 3.636 *S12/280Z*
FS5W71C 3.321 1.902 1.308 1.000 0.759 -.--- 3.636 *Z31 N/A*
RS5R30A 3.214 1.925 1.302 1.000 0.752 -.--- 3.369 *Z32*
FS5R30A 3.324 2.077 1.360 1.000 0.711 -.--- 3.382 *88-89 Z31 Turbo*
FS5R30A 3.324 2.077 1.360 1.000 0.751 -.--- 3.382 *87 Z31 Turbo*
*89-86 Pathfinder 2WD with 6 Cyl*
*87-96 Pathfinder 4X4 with 6 Cyl*
*86-96 Pickup 2WD with 6 Cyl*
*86-96 Pickup 4X4 with 6 Cyl*
FS5R90A 3.350 2.056 1.376 1.000 0.752 -.--- 3.153 *84-86 Z31 Turbo*


AUTOMATIC

Trans type 1st 2nd 3rd 4th 5th other Reverse *Notes*


3sp RWD

3N71B 2.458 1.458 1.000 -.--- -.--- -.--- 2.182 *240Z/S12/510/710/810* Maxima/210/620

can anyone confirm the
260Z 2+2
1st 2.906:1
2nd 1.902:1
3rd 1.308:1
4th 1.000:1
5th 0.864:1
Rev 3.382:1

that would be mad with 5th 0.759:1 from the FS5W71C if interchangeable