| 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. |
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2.44 1ST GEAR SET (1959 thru 1984)
Part #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)
(Not shown)
Part #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.
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3.00 1ST GEAR SET (Original stock
ratio) (Not shown)
Part #201090 (Not pictured) (1959 thru 1984)
Part #201094 (Not pictured) (1936 thru 1958)
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.
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COMBINATION 2.24 1ST- 1.65 2ND GEAR
SET (Not shown)
Part #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.
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STOCK 2ND GEAR (1.82 RATIO)
Part #202160 (replaces H/D# 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.
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CLOSE RATIO 3RD GEAR SET (1.35 RATIO)
Part #203365 (early) Transmissions built before mid 1976, to serial#
U-8958 (or lower) with loose needle bearings.
Part #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).
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STOCK 3RD GEAR (1.23 RATIO) (Not
shown)
Part #206220 (replaces H/D# 35306-59) (Mainshaft 3rd)
Part #206215 (replaces H/D# 35306-36) (Mainshaft 3rd)
(This gear requires 1936-58 style cluster gear)
Part #206330 (replaces H/D# 35700-36) (Cluster: 36-76)
Part #206335 (replaces H/D# 35700-76) (Cluster: 76-86)
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.
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STOCK MAIN DRIVE GEAR (4TH)
Part #204260 (1936-1976) (replaces H/D# 35065-65)
Part #204280 (1977-1986) (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.
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SHIFT CLUTCHES
Part #205120 (1-2 clutch) (replaces H/D# 35665-36)
Part #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.
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SHIFT FORKS
Part #209750 (1-2 fork) (replaces H/D# 34159-36)
Part #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.
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TRANSMISSION MAINSHAFTS
Part #208500 (early) H/D# 35040-50, 1937-1964
Part #208650 (mid) H/D# 35039-65, 1965-1969
Part #208700 (late) H/D# 35039-70A, 1970-1985 chain
Part #208800 (late) H/D# 35039-85, belt drive, Late 1984-'86
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
Part #207650 (1941-early 1976) (replaces H/D 35614-65)
Part #207770 (late 1976-1979) (replaces H/D 35614-77)
Part #207800 (1980-1985) (replaces H/D 35614-80)
Three types of countershafts fit transmissions thru 1985. They are not
interchangeable, so make sure before you order.
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TRANSMISSION REBUILDING KITS (Small
Parts)
Bushings, gaskets, locks, keys and ferrules for completing a 4 speed
transmission rebuild. These parts are made by JIMS. |
| Kit #210925 |
(1936-1976) |
| Kit #210950 |
(1977-1979) |
| Kit #210975 |
(1980-1984) |
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). |
| Kit #210150 (2.44 1st, 1.35 3rd) |
(1936-1976) |
| Kit #210250 (2.44 1st, 1.23 3rd) |
(1936-1976) |
| Kit #210350 (2.60 1st, 1.35 3rd) |
(1936-1976) |
| Kit #210450 (2.60 1st, 1.23 3rd) |
(1936-1976) |
| Kit #210550 (2.44 1st, 1.35 3rd) |
(1977-1984) |
| Kit #210650 (2.44 1st, 1.23 3rd) |
(1977-1984) |
| Kit #210750 (2.60 1st, 1.35 3rd) |
(1977-1984) |
| Kit #210850 (2.60 1st, 1.23 3rd) |
(1977-1984) |
