35 - 2
Section F Transmission
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
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