The Z31 came with three different manual 5 speed transmissions and 2 different Automatics. Manual Transmission Specifications The Z31 came with three different manual 5 speed transmissions. All manual non-turbos used a 5 speed Nissan transmission (FS5W71C) which is quite reliable. The 84-86 manual turbos used a Borg-Warner T-5 5 speed (FS5R90A). The 87-89 manual turbo transmissions are a Nissan made (FS5R30A) model. Internally, they are the same as the Nissan transmission found in z32 twin turbos( the starter location on the turbo version for clearance), trucks, pathfinders, etc. The 1987 model FS5R30A has a little different gear set than the 1988 and 1989. All manual transmissions have synchros on all forward gears. If you change the gear oil in your transmission on a semi-regular basis it should give you absolutely no trouble at all. 280ZX S130 Transmission Differences In the 1979 to 1983 S130 280zx there was six transmissions that were offered. Below you will find the differences and specifications. Manual Transmissions Datsun/Nissan made several 4 and 5-speed manual transmissions available in the second generation Z car or S130. The 1981-1983 FS5W71B is a "close ratio" five speed transmission where the FS5R90A 5-speed transmission found in the 1983 280zx turbo is a "wide ratio" transmission. Close ratio transmissons are preferred for road racing as they allow the driver to maintain a tighter rev range between gears compared to wide ratio versions. Finding the "optimum" transmission for your car all depends on what you are wanting from your car. For most people the "best" transmission is what is already in your car. You can tell the difference between the FS5W71B and the FS5R90A by the shifter mounting. Gear ratio/Transmission Model 1979 F4W71B 1979-1980 FS5W71B 1981-1983 FS5W71B 1983 FS5R90A 1st 3.3213.3213.0623.500 2nd 2.0772.0771.8582.144 3rd 1.3081.3081.3081.357 4th 1.001.001.001.00 5th N/A0.8640.7450.780 Automatic Transmissions There are two Automatic Transmissions that were offered in the S130. They were the 3 speed 3N71B and 3 speed L3N71B. They are both a fully automatic unit consisting primarily of a 3-element hydraulic torque converter, two planetary gear sets, two multiple-disk clutches, a multiple-disk brake, a band brake and a one way sprang clutch. Other than the number of clutch plates the transmissions are the same. The chart below will explain the differences. Engine Model L28E L28ET Model Code Number X6703X2770 Torque Converter Stamp GHA High-Reverse clutch (front)Number Of Drive Plates 34 Number Of Driven Plates 55 Clearence mm (in)1.6 - 2.0 (0.063 - 0.079)1.6 - 2.0 (0.063 - 0.079)Thickness of retaining plate. Thickness mm (in)Part Number 5.0 (0.197)31567-X2900 5.2 (0.205)31567-X2901 5.4 (0.213)31567-X2902 5.6 (0.220)31567-X2903 5.8 (0.228)31567-X2904 6.0 (0.236)31567-X2905 6.2 (0.244)31567-X2906 Forward Clutch Rear Number Of Drive Plates 66 Number Of Driven Plates66 Clearence mm (in)0.8 - 1.6 (0.031 - 0.063)0.8 - 1.6 (0.031 - 0.063)Thickness Of Retaining Plate 4.80 mm (0.1980 in)4.80 mm (0.1980 in) Low And Reverse Brake Number Of Drive Plates 57Number Of Driven Plates 57 Clearence mm (in)0.08 - 1.25 (0.0315 - 0.063)0.08 - 1.25 (0.0315 - 0.063)Thickness Of Retaining Plate Thickness mm (in)Part Number 7.8 (0.307)31667-X0500 8.0 (0.315)31667-X0501 8.2 (0.323)31667-X0502 8.4 (0.331)31667-X0503 8.6 (0.339)31667-X0504 8.8 (0.346)31667-X0505 Brake Band Piston Size mm (in) Big Diameter64 (2.52)72 (2.83)Small Diameter40 (1.57)44 (1.73) Control Valve Assembly Stamp mark on strainer MEMTRBK Governer Assembly Stamp Mark on Governer Assembly M33M33 Stall Revolution RPM2,000 - 2,3002,400 - 2,700 Changing of the gear ratios is fully automatic in relation to car speed and engine torque input. Below you will find Identification information of the automatic unit.
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