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2016roadiron

748 BIG TWIN: 4 SPEED TRANSMISSION GEAR SETS Big Twin 4 speed transmissions have been built since 1936 in several versions. They were included on bikes with Knuckle engines, Pans, Shovels and some ‘84 and ‘85 Evolution 80’s. They all used this transmission. With Andrews 4 speed gears, transmissions last longer, shift faster, and just plain run better. Bikes with Andrews gears feel so good that it’s hard to believe until you experience the difference for yourself. 2.60 1st Gear Set (1959 thru 1984) (24T & 16T) This gear set works best with “E” glides and heavier bikes with motor or trans sprockets having more teeth than stock sprockets. Installation in ‘80-84 FX requires 21T (1.82 ratio) 2nd gear for this 1st gear. (16T & 20T on cluster; 24T on counter gear.) 349-4404 3.00 1st Gear Sets (Original stock ratio) (1959 thru 1984) (15T & 20T cluster; 26T counter gear) 349-4405 Combination 2.24 1st & 1.65 2nd Gear Set If you want peak RPM through the quarter mile, this gear set will provide the super close ratio shifting to handle it. OK for street or drags with any size motor. 349-4400 (B) Shift Forks One piece cold forged forks. Fully heat treated and black oxide coated, a must for all transmission rebuilds. Andrews shifter forks 349-4432 Countershaft (1-2 fork) (Repl. H/D #34159-36) 349-4434 Mainshaft (3-4 fork) (Replaces H/D #34158-36) (C) Shift Clutches Replacement clutches are specially heat treated and shot-peened for super durability. 3-4 clutches are face milled and have longer lead in ramps for more positive shifts. 349-4416 Countershaft (1-2 clutch) (Repl. H/D #35665-36) 349-4418 Mainshaft (3-4 clutch) (Repl. H/D #35440-38) (D) Stock 2nd Gear (1.82 Ratio) (21T) (Replaces H/D #35751-36) Stock 2nd gear with drive slots include lead in ramps for more positive 1-2 shifts. This 21 tooth gear fits 1941-1979. It will also fit later transmissions but requires one of the first gear sets shown above. 349-4406 (E & F) Close Ratio 3rd Set 1.35 Ratio (18T & 23T) (early) Transmissions built before mid ‘76, to serial #U-8958 (or lower) with loose needle bearings. 349-4408 (E & F) Close Ratio 3rd Set 1.35 Ratio (18T & 23T) (late) For transmissions built after mid ‘76, from serial #U-8959 (or higher) with caged needle bearings. Design drive slots include lead in ramps for quicker, more positive shifting (same as stock 3rd and 4th gears). 349-4410 (E & F) Stock 3rd (1.23 Ratio) (17T & 24T) Replacement for stock main and countershaft 3rd. The design of drive slots on mainshaft gear has been upgraded to include lead-in ramps for quick, more positive shifting. 349-4420 Replaces H/D #35306-59) (Mainshaft 3rd) 349-4409 Replaces H/D 35700-36) (Cluster: ‘36-E76) 349-4411 Replaces H/D #35700-76) (Cluster: L76-’86) (G) Stock Main Drive Gear (4th) Replacement 4th gears are made with wider drive slots and steeper lead in ramps for more positive 3-4 shifting. The “O” ring groove is a design update for all chain drive 4th gears from 1977 through 1984. 349-4412 (36-76) (26 Teeth) (Replaces H/D #35065-65) 349-4414 (77-86) (26 Teeth) (Replaces H/D #35067-77 and 35067-84) (H) Transmission Mainshafts Replacement mainshafts for all versions of big twin boxes. Made from aircraft alloy steel. Heat treated and finish ground to ensure maximum durability. 349-4426 (early) (Replaces H/D #35040-50, 1937-1964) 349-4428 (mid) (Replaces H/D #35039-65, 1965-1969) 349-4430 (late) (Replaces H/D #35039-70A, 1970-1985 chain) 349-4687 (late) (Replaces H/D #35039-85, belt drive, Late 1984-’86) (I) Transmission Countershafts Three types of countershafts fit transmissions through 1985. 349-4422 (1941-early 1976) Replaces H/D #35614-65) 349-4424 (Late 1976-1979) (Replaces H/D #35614-77) 349-4425 (1980-1985) Replaces H/D #35614-80) Transmission Gear Kits Gear kits must be ordered by part numbers listed below which specify year and 1st and 3rd ratios. Each gear kit includes 6 gears, 2 shift clutches and 2 forks as shown above. (Shafts and small parts kits must be ordered separately.) 349-4680 (2.44 1st, 1.35 3rd) (1936-1976) 349-5102 (2.44 1st, 1.23 3rd) (1936-1976) 349-4682 (2.44 1st, 1.35 3rd) (1977-1984) 349-5105 (2.44 1st, 1.23 3rd) (1977-1984) (A) 2.44 1st Gear Set (1959 thru 1984) Best choice for SuperGlides, choppers and lighter bikes with stock or smaller motor or trans sprockets. This is a ‘no clunk’, 48 mph, 1st gear. Installation in ‘80-’84 FX requires a 21 tooth 2nd gear. (17T & 20T on cluster; 24T on counter gear.) 349-4402


2016roadiron
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