Isuzu Rodeo UE. Manual - part 493
7B–4
MANUAL TRANSMISSION
TREMEC T5R Transmission
A07RS031
The TREMEC T5R (77 mm 5 speed) is a constant mesh
transmission, synchronized in all speeds except reverse.
The main components are:
1. Input shaft gear.
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An integral shaft is splined to engage with the clutch
driven plate.
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The gear drives the countergear.
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A tapered roller bearing supports the shaft in case.
2. Countershaft gear.
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The countershaft gear is one unit for constant
rotation with the input shaft gear.
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Tapered roller bearings support the countershaft
gear in the case.
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Thrust washer limits the play of the countershaft
gear.
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An extra gear is mounted to the countershaft gear
for 5th speed.
3. Mainshaft.
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The drive gears rotate freely on the mainshaft and
are in constant mesh with countershaft gear.
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Key-type synchronizers engage the gears.
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The 1st and 2nd synchronizer hub is machined in
place.
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A tapered roller bearing supports the mainshaft in
the rear of the case.
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Roller bearings support the mainshaft
independently in the input shaft gear.
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The input shaft gear and mainshaft are engaged by
a synchronizer for direct drive in top gear.
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Thrust washers limit the play of the mainshaft.
4. Reverse idler gear.
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The idler gear drives the mainshaft in reverse.
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The idler gear is supported on its own shaft.
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A reverse brake feature brakes the countershaft
gear in the reverse shift sequence.
5. Shift lever.
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The shift lever is mounted on the extension housing
and holds the offset lever.
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The shift lever moves the shaft which is mounted in
the transmission top cover.
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Shift forks mounted on shaft move the
synchronizers to engage the gears.
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A pin-type interlock blocks the other forks when one
is moved.