35 - 2
Section F
9803/3280
Section F
35 - 2
Issue 1
Fault Finding
Synchro Shuttle Gearbox (cont'd)
CHECK
ACTION
14
Is 'converter in' pressure as specified?
YES: Check 15
NO: Inspect converter relief valve for damage. Check
cooler bypass valve pressure setting.
15
Is pump being driven by converter?
YES: Check pump pressure.
NO: Renew damaged parts.
16
Are clutch sealing rings damaged?
YES: Tap pressure gauge into clutch feed lines to monitor
pressure.
NO: Check clutch plates for damage.
17
Is there drive in one direction only?
YES: Check 19
NO: Check 18
18
Is the start switch in the run position and supplying
YES: Check 19
current to the neutral start relay?
NO: Rectify.
19
Is the fault only when the transmission is hot?
YES: Dismantle solenoid and check components.
NO: Check microswitches, relay and wiring loom.
20
Is the noise a growl, hum or grinding?
YES: Check gears for damage or wear.
NO: Check 21
21
Is the noise a hiss, thump or bumping?
YES: Check bearings for damage or wear.
NO: Check 22
22
Is the noise a squeal?
YES: Check free running gears for seizure.
NO: Check 23
23
Is the noise present when in neutral or when in gear? NEUTRAL: Check 24
IN GEAR: Check 27
24
Is the countershaft or its bearings worn or damaged?
YES: Renew damaged parts.
NO: Check 25
25
Is there excessive backlash in the gears?
YES: Adjust by checking shaft end float.
NO: Check 26
26
Is the mainshaft pilot bearing worn?
YES: Renew.
NO: Check gear teeth for scuffing.
27
Is the mainshaft rear bearing worn?
YES: Renew.
NO: Check 28
28
Are the sliding gear teeth worn or damaged?
YES: Renew gears.
NO: Check 29
29
Are the selector forks loose?
YES: Tighten screws.
NO: Check 30
30
Are the selector fork pads or grooves in gears worn?
YES: Renew worn parts.
NO: Check 31
31
Are the dog gear teeth worn?
YES: Renew.
NO: Check 32
32
Are the selector rod detent springs broken?
YES: Renew.
NO: Check 33