L-series, NAPS-Z and CA20 gearbox ratios Notice that there are a few basic groupings of gear ratio sets. The '77-'79 200sx/HL510 tranny uses stock 510 sedan 4-speed ratios with an OD. The '77-'79 200sx/HL510 tranny is the dogleg 5-speed with reverse-above-1st gear pattern, same length as stock 4-speed so no driveshaft shortening needed to swap. This is a well spaced gearset but the OD gear could stand to be slightly taller. The Z22E 7/81-9/83 200sx and the truck #1 (plus an overdrive) are same as the late 240 and 280Z 4-speed ratios. Ratios not particularly well spaced. NAPS-Z tranny can be bolted to a L-series engine but the shifter will be angled toward passenger, bend lever to compensate or swap on a Z/ZX bellhousing. The 280Z 5-speed ratios are largely "re-used" for the Maxima, 6/79-6/81 200sx w/ Z20e, nismo wide ratio, truck #2. Ratios are poorly spaced. The 11/84-2/86 200sx w/ CA20 is very similar except it has much better gear ratio for 2nd that closes the huge 2nd-3rd hole in the 280Z pattern. For use with an L-series, a 280Z/ZX style bellhousing must be swaped onto the CA20 tranny case and bellhousing modified to match with larger diameter CA20 shifter rods, and use smaller OD 280zx jackshaft bearing The roadster, 280ZX and nismo close ratio gearsets are fairly similar. 1st gear on these trannys is too tall for stock 3.9:1 510 differential, street starting acceleration suffer. Otherwize, nicely spaced ratios except for the too-tall .745 ZX 5th gear. The 1980 ZX gearbox has slightly shorter 5th gear and would be prefered. '83-10/'84 200sx w/CA20 and the truck # 3 use same ratios. This is often touted as the best gearsets for a 4-cylinder 510. Very low 1st gear for fast starting acceleration and smooth progression of jumps between ratios. For use with an L-series, a 280Z/ZX style bellhousing must be swaped onto the CA20 tranny case and bellhousing modified to match with larger diameter CA20 shifter rods, and use smaller OD 280zx jackshaft bearing. Sorry, I dont know what years/models of trucks corrospond to truck #1, #2, #3 gearsets. Table on left side is the actual gear ratios for given application.Table on right side is calcualted % jump between seqential gear shift. To better visualize the ratio sets, see the bar chart below table that graphs the % jump between gears. Application Type First Second Third Fourth Fifth Application %1st/2nd %2nd/3rd %3rd/4th %4th/5th 510 Sedan Short Tail 3.382 2.013 1.312 1 N/A 510 Sedan 40.5% 34.8% 23.8% #VALUE! 510 Wagon Short Tail 3.657 2.117 1.419 1 N/A 510 Wagon 42.1% 33.0% 29.5% #VALUE! 70-71 240z 4-Speed 3-piece 3.592 2.197 1.420 1 N/A 240z-280z 4 Speed 38.8% 35.4% 29.6% #VALUE! 240z-280z 4 Speed Long Tail 3.592 2.246 1.415 1 N/A 240z-280z 4 Speed 37.5% 37.0% 29.3% #VALUE! '77-'79 200sx Short Tail 3.382 2.013 1.312 1 0.854 '77-'79 200sx 40.5% 34.8% 23.8% 14.6% Roadster 5 Speed Long Tail 2.96 1.855 1.31 1 0.85 Roadster 5 Speed 37.3% 29.4% 23.7% 15.0% 280z 5 Speed Long Tail 3.321 2.077 1.308 1 0.864 280z 5 Speed 37.5% 37.0% 23.5% 13.6% 8/78-7/79 280zx Long Tail 3.321 2.077 1.308 1 0.864 8/78-7/79 280zx 37.5% 37.0% 23.5% 13.6% 8/79-6/80 280zx Long Tail 3.062 1.858 1.308 1 0.773 8/79-6/80 280zx 39.3% 29.6% 23.5% 22.7% 7/80-6/83 280zx Long Tail 3.062 1.858 1.308 1 0.745 7/80-6/83 280zx 39.3% 29.6% 23.5% 25.5% 810/Maxima Long Tail 3.321 2.077 1.308 1 0.864 810/Maxima 37.5% 37.0% 23.5% 13.6% 200sx Z20e 6/79-6/81 Long Naps Z 3.321 2.077 1.308 1 0.864 200sx Z20e 6/79-6/81 37.5% 37.0% 23.5% 13.6% 200sx Z22E 7/81-9/83 Long NapsZ 3.592 2.246 1.415 1 0.813 200sx Z22E 7/81-9/83 37.5% 37.0% 29.3% 18.7% 200sx CA20 10/83-10/84 Long Tail 3.592 2.057 1.361 1 0.813 200sx CA20 10/83-10/84 42.7% 33.8% 26.5% 18.7% 200sx CA20 11/84-2/86 Long Tail 3.321 1.902 1.308 1 0.833 200sx CA20 11/84-2/86 42.7% 31.2% 23.5% 16.7% NisMo Wide Long Tail 3.321 2.077 1.308 1 0.864 NisMo Wide 37.5% 37.0% 23.5% 13.6% NisMo Close Long Tail 2.906 1.902 1.308 1 0.864 NisMo Close 34.5% 31.2% 23.5% 13.6% NisMo Option 1 Long Tail 2.818 1.973 1.47 1.192 1 NisMo Option 1 30.0% 25.5% 18.9% 16.1% NisMo Option 2 Long Tail 2.348 1.601 1.296 1.138 1 NisMo Option 2 31.8% 19.1% 12.2% 12.1% NisMo Option 3 Long Tail 2.192 1.601 1.47 1.138 1 NisMo Option 3 27.0% 8.2% 22.6% 12.1% NisMo Option 4 Long Tail 3.321 2.27 1.601 1.24 1 NisMo Option 4 31.6% 29.5% 22.5% 19.4% Truck #1 ? 3.592 2.246 1.415 1 0.813 Truck #1 37.5% 37.0% 29.3% 18.7% Truck #2 ? 3.321 2.077 1.308 1 0.833 Truck #2 37.5% 37.0% 23.5% 16.7% Truck #3 ? 3.592 2.0573 1.3614 1 0.813 Truck #3 42.7% 33.8% 26.5% 18.7% 280ZX Turbo T-5 borg-warner 3.500 2.144 1.375 1 0.780 280ZX Turbo T-5 38.7% 35.9% 27.3% 22.0% ChartObject ChartObject Chart 1 What do you swap-in behind your new tranny? How about a different differential. Ratios available are: R160 3.7 ________510 1968 3.9 ________510 1969-1973 manual and auto to '72 4.11_______ 510 '73 automatic Subaru also used the R160, some with LSD! see Kurts LSD FAQ R180 ( Z ) 3.364________ 240-260Z 1970-74 Manual 3.545________ 240-280ZX all Automatic R180 ( Non Z ) 3.364________ Maxima Sedan Automatic 3.545________ Maxima Sedan Manual 3.700________ 810 Sedan 3.900________ 720 4X4 1/83-6/83 ( front diff ) 4.111________ 720 4X4 6/83-12/85 ( front diff ) 4.111________ 200SX N/T 1984-1988 4.375________ 720 4X4 6/79-12/82 ( front diff ) 4.625________ 720 4X4 long bed 8/79-6/80 ( front diff ) R200 3.364________280ZX 8-7/79 and 280ZX Automatics and 280ZX Turbos 3.545________ 280Z Manual and 280ZX Turbo 3.700________ 280ZX Manual 6/78-6/79 and 300ZX N/T and Turbo 3.900________ 280ZX N/T 80-83 ( year model) and 200SX Turbo 84 and 200SX V6 4.111________ 200SX Turbo 85-86 ( year model)