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| - | A [wikipedia:Jatco_4N71_transmission|4-speed JATCO L4N71] was made during the 1980s. The top gear is an overdrive ratio, for reduced revs at highway speeds. It also has a lockup system (3rd and fourth gears are direct) for fuel-economy approaching that of a manual transmission. | + | A [[wikipedia:Jatco_4N71_transmission|4-speed JATCO L4N71]] was made during the 1980s. The top gear is an overdrive ratio, for reduced revs at highway speeds. It also has a lockup system (3rd and fourth gears are direct) for fuel-economy approaching that of a manual transmission. |
| Will it fit into an automatic-bodied Datsun 1200? Unknown -- try it and let us know. They came in Maximas and 200SX (silvia) models, as well as in Datsun pickups and Mazdas. | Will it fit into an automatic-bodied Datsun 1200? Unknown -- try it and let us know. They came in Maximas and 200SX (silvia) models, as well as in Datsun pickups and Mazdas. | ||
Revision as of 19:51, 10 February 2008
A 4-speed JATCO L4N71 was made during the 1980s. The top gear is an overdrive ratio, for reduced revs at highway speeds. It also has a lockup system (3rd and fourth gears are direct) for fuel-economy approaching that of a manual transmission.
Will it fit into an automatic-bodied Datsun 1200? Unknown -- try it and let us know. They came in Maximas and 200SX (silvia) models, as well as in Datsun pickups and Mazdas.
Comparo of 3-speed to 4-speed
- 4-speed is bigger around at the back, probably requires tunnel mods
- New rear engine crossmember (gearbox crossmember) will need to be fabricated
- Wiring changes are needed
- Swap converter housing with an A-series one
- Stall speeds vary, so swapping converters may be needed to find one that suits the small engine
Approximate Junkyard Costs:
- L4N71B 4-speed OD transmission from Pick-N-Pull: $130
- Flex plate including crank shaft spacers: $20
- Auto shift lever from early Datsun: $18
- Kickdown switch and mounting bracket from early Datsun: $3.50
- Automatic-size Brake pedal: $3
- Maintainence items (filter, seals, modulator): $32
- Hard fluid lines from B310: $9
- Flexible Fluid hoses: $10
- Radiator with auto-trans coolor lines: ?
- Driveshaft shortened, rebuilt, balanced: $165
- length is 2.7 cm (about one inch) longer
- New rear transmission mount: $25
- Hardware (bolts, nuts, metal spacers): $15
- L3N71A/L3N71B converter housing for A-series engine
- Will this fit on the L4N71B?
references: