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MANUAL TRANSMISSION SPECS
T-18/T-98
Type: 4-spd. manual
Length (in.): 11.87
Ratios: 4.03:1 (1st)
2.42:1 (2nd)
1.41:1 (3rd)
1.00:1 (4th).
Weight (lb.): 150 (approx.)
Used by: Ford, Jeep, and IH in a number of vehicles and styles that may
or may not be interchangeable due to bolt patterns, input-shaft lengths, and rear face
designs. The T-18 and early-model (1953-66) T-98 are basically the same except in the way
the main shaft is supported. This is a fairly compact transmission with a cast-iron case.
Its extremely strong design makes it very popular, and it's easily adapted to a variety of
applications. The left side of the case is stamped T-18 or T-98. A PTO access plate can be
found on the left-hand side.
T-170 SERIES
Type:
4-spd. manual
Ratios (:1) T-176 T-177 T-178
1st 3.52 3.82 3.00
2nd 2.27 2.29 2.08
3rd 1.46 1.46 1.47
4th 1.00 1.00 1.00
Rev. 3.52 3.83 3.01
Weight (lb.): 70 (approx.)
Length (in.): 10 1/4 (approx.)
Used by: Jeep, in various configurations from 1980-86. This
aluminum-cased, fully synchronized transmission series was made by Tremac of Mexico. The
least desirable is the T-178 with its tall First gear; the most desirable is the T-177,
which has the widest gear spread of the three. Generally speaking, it was used with
six-cylinder engines; most V-8s used the T-176. This series is conservatively rated at 275
lb.-ft. of torque, but these transmissions are capable of handling considerably more.
These trannys use the Ford bolt pattern, the same as the T-150. The T-series may have
casting No. 2604203. The shift cover is top-mounted and held on with 10 bolts.
MUNCIE (SM) 465
Type:
4-spd. manual
Length (in.): 12
Ratios: 6.54:1 (1st)
3.57:1 (2nd)
1.57:1 (3rd)
1.00:1 (4th).
Used by: 1968-1990 Heavy Duty. Chevrolet, in Blazers and pickups. This
Muncie-built gearbox is often referred to as the SM 465 (the similar CH 465 uses a
different cluster gear bearing assembly). The SM 465's cast-iron case is easily identified
by being almost as wide as it is long, and by the stiffening ribs at the back of the case.
It must be used with a matching bellhousing... instead of having a standard Chevy 4
11/16-inch bearing retainer, it uses a 5 1/8-inch retainer. It is very strong, but quite
large and heavy, and the ratios above are the only ones available.
MUNCIE (SM) 420
Type:
4-spd. manual
Length (in.): 10.43
Ratios: 7.05:1 (1st)
3.57:1 (2nd)
1.70:1 (3rd)
1.00:1 (4th).
Used by: 1947-1967 G.M. trucks. HEAVY Duty. Desirable by serious rock crawlers
for the granny low first gear.
NV 4500
Type:
5-spd. manual
Length (in.): 12.37
Ratios: 5.61:1 (1st)
3.04:1 (2nd)
1.67:1 (3rd)
1.00:1 (4th).
.73 (5th)
Used by: 1992-1995 GM & Dodge only
TOYOTA LAND CRUISER
Type:
3-spd. manual
Length (in.): 8
Ratios: 2.757:1 (1st)
1.691:1 (2nd)
1.00:1 (3rd)
Used by: Land Cruisers 1957-1974. Rated light duty. Much stronger than
"light duty"
Information herein is deemed reliable but not guaranteed. Always verify
technical information with a professional.
MORE TO COME....
