| BIG TWIN: 4 SPEED TRANSMISSIONS |
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| 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. |
| BIG TWIN COMPLETE 4 SPEED 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 on previous page. (Shafts and small parts kits must be ordered separately). | |||
| TEC # | Andrews # | Description | Years |
| 84476 | 210150 | (2.44 1st, 1.35 3rd) | (1936-1976) |
| 84477 | 210250 | (2.44 1st, 1.23 3rd) | (1936-1976) |
| 84478 | 210350 | (2.60 1st, 1.35 3rd) | (1936-1976) |
| 84479 | 210450 | (2.60 1st, 1.23 3rd) | (1936-1976) |
| 84480 | 210550 | (2.44 1st, 1.35 3rd) | (1977-1984) |
| 84481 | 210650 | (2.44 1st, 1.23 3rd) | (1977-1984) |
| 84482 | 210750 | (2.60 1st, 1.35 3rd) | (1977-1984) |
| 84483 | 210850 | (2.60 1st, 1.23 3rd) | (1977-1984) |
| BIG TWIN: 4 SPEED TRANSMISSION GEAR SETS | |||
| 2.44 1ST GEAR SET (1959 thru 1984) | |||
| TEC # | Andrews # | Description | |
| 84400 | 201105 | 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 21T (1.82 ratio) 2nd gear for this 1st gear. | |
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2.60
1ST GEAR SET (1959 thru 1984)
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| 84401 | 201145 | 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. | |
| 3.00 1ST GEAR SET (Original stock ratio) | |||
| 84393 | 201090 | (1959 thru 1984) | Stock replacement first cluster and countershaft gear. Cluster gear has 15 and 20 teeth; counter has 26 teeth. 1936 version has no rear counterbore and requires short length 3rd main gear part #206215 |
| 84392 | 201094 | (1936 thru 1958) | |
| BIG TWIN: 4 SPEED TRANSMISSION GEARS | ||
| COMBINATION 2.24 1ST- 1.65 2ND GEAR SET | ||
| 84402 | 201020 | If you
want peak RPM thru 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. |
| STOCK 2ND GEAR (1.82 RATIO) | |||
| 84403 | 202160 | 35751-36) | Stock 2nd gear with face milled drive dogs 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. |
| CLOSE RATIO 3RD GEAR SET (1.35 RATIO) | |||
| 84405 | 203365 | Early | Transmissions built before mid 1976, to serial# U-8958 (or lower) with loose needle bearings. |
| 84406 | 203375 | Late | For transmissions built after mid 1976, from serial# U-8959 (or higher) with caged needle bearings. New design drive slots include lead in ramps for quicker, more positive shifting (same as stock 3rd and 4th gears). |
| STOCK 3RD GEAR (1.23 RATIO) | |||
| 84404 | 206220 | (Mainshaft 3rd) | (replaces H/D# 35306-59) |
| 84420 | 206215 | (Mainshaft 3rd) | (replaces H/D# 35306-36) |
| (This gear requires 1936-58 style cluster gear) | |||
| 84408 | 206330 | Cluster: 36-76 | (replaces H/D# 35700-36) |
| 84409 | 206335 | Cluster: 76-86 | (replaces H/D# 35700-76) |
| Replacements for stock main and countershaft 3rd. The design of drive slots on mainshaft gear has been upgraded to include lead-in ramps for quicker, more positive shifting. | |||
| STOCK MAIN DRIVE GEAR (4TH) |
| 84410 | 204260 | (1936-1976) Early | (replaces H/D# 35065-65) |
| 84412 | 204280 | (1977-1986) Late | (replaces H/D# 35067-77 and 35067- 84) |
| Replacement 4th gears are made with wider drive slots and steeper lead-in ramps for more positive 3-4 shifting. The "O" ring groove addition is a design update for all chain drive (1977-1984) 4th gears | |||
| Shift Clutches |
| 84450 | 205120 | (1-2 clutch) | (replaces H/D# 35665-36) |
| 84458 | 205340 | (3-4 clutch) | (replaces H/D# 35440-38) |
| 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. | |||
| Shift Forks |
| 84456 | 209750 | (1-2 fork) | (replaces H/D# 34159-36) |
| 84458 | 209760 | (3-4 fork) | (replaces H/D# 34158-36) |
| One piece cold forged forks. Fully heat treated and black oxide coated, a must for all transmission rebuilds. | |||
| TRANSMISSION MAINSHAFTS |
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| TEC # | Andrews | Years | Replaces | ||
| 84464 | 208500 | 1937-1964 | early | 35040-50 | |
| 84465 | 208650 | 1965-1969 | mid | 35039-65 | |
| 84470 | 208700 | 1970-1985 chain | late | 35039-70A | |
| 84471 | 208800 | Late 1984-'86 belt drive | late | 35039-85 | |
| Replacement mainshafts for all versions of big twin boxes. Made from aircraft alloy steel. Heat treated and finish ground to ensure maximum durability. | |||||
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TRANSMISSION COUNTERSHAFTS |
Picture to come |
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| TEC # | Andrews | Years | Replaces | |
| 84465 | 207650 | 1941-early '76 | 35614-65 | |
| 84470 | 207770 | 1976-79 | 35614-77 | |
| 84471 | 207800 | 1980-85 | 35614-80 | |
| Three types of countershafts fit transmissions thru 1985. They are not interchangeable, so make sure before you order. | ||||
