Land Rover Defender V8i Workshop Supplement Rover Manual
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44AUTOMATIC GEARBOX 6 FAULT DIAGNOSIS 1. A Clutch assembly 2. B Clutch assembly
AUTOMATIC GEARBOX 7 FAULT DIAGNOSIS 1. C and D Clutch assembly
44AUTOMATIC GEARBOX 8 FAULT DIAGNOSIS 1. Freewheel and fourth gear assembly
AUTOMATIC GEARBOX 9 FAULT DIAGNOSIS 1. E and F Clutch assembly
44AUTOMATIC GEARBOX 10 FAULT DIAGNOSIS FAULT SYMPTOMS SYMPTOM 1 - Intermittent drive and high pitched noise FAULT - Low fluid level or restricted filter SYMPTOM 2 - No drive in reverse Select D ·No drive FAULT - Continue with Symptom 3 ·Drives forward FAULT - Reverse gear interlock valve seized Select 1 ·No engine braking FAULT - Clutch brake 3 SYMPTOM 3 - No drive from rest with D selected Select 1 ·Vehicle drives FAULT - No 2 freewheel ·No drive Carry out main line pressure check ·Normal pressure FAULT - Clutch A ·No pressure FAULT - Blocked filter or pump failure ·Low pressure FAULT - Restricted filter or sticking primary regulator SYMPTOM 4 - Slip in all forward gears Carry out main line pressure check ·No pressure FAULT - Blocked filter or pump failure ·Low pressure FAULT - Restricted filter or sticking primary regulator ·Normal pressure FAULT - Clutch ASYMPTOM 5 - Harsh engagement N to D Check engine idle speed Carry out main line pressure check ·High pressure FAULT - Primary regulator stuck ·Normal pressure FAULT - Clutch A or damper for clutchA SYMPTOM 6 - Fierce shift or flare 1st to 2nd shift Check engine idle speed Carry out mainline pressure check ·High pressure FAULT - Continue with symptom 5 ·Normal pressure FAULT - Modulator valve or dampers for clutch brake CB1 and/or clutch brake CB2 FAULT - Clutch brake CB1 and/or clutch brake CB2 SYMPTOM 7 - Fierce shift or flare 2nd to 3rd Carry out mainline pressure check ·High pressure FAULT - Continue with symptom 5 ·Normal pressure FAULT - Modulator valve or clutch B damper FAULT - Clutch B SYMPTOM 8 - No 3rd gear FAULT - 2-3 shift valve FAULT - Clutch B SYMPTOM 9 - No 4th gear D selected FAULT - 4th to 3rd downshift valve stuck or 3rd to 4th upshift valve stuck FAULT - Clutch brake 4
AUTOMATIC GEARBOX 11 FAULT DIAGNOSIS SYMPTOM 10 - None or harsh engagement of direct drive clutch NOTE: The direct drive clutch will only engage if 4th gear is engaged at 40 to 45 mph (64 to 72 kph). Carry out road test pressure check with gauge connected to torque converter. ·Normal pressure FAULT - Failed direct drive clutch ·Pressures correct but remains high FAULTS POSSIBLE - Direct drive clutch and torque converter control valve stuck Hysteresis valve stuck Direct drive clutch control valve stuck SYMPTOM 11 - Direct drive clutch shift point incorrect or at low speed NOTE: Direct drive clutch engagement at low speed will cause vibration in the torque converter Carry out mainline and torque converter pressure check ·Normal pressure FAULT - Governor valve sticking ·Low or incorrect pressure FAULTS POSSIBLE - Direct drive clutch and torque converter control valve sticking. Hysteresis valve stuck. Direct drive clutch control valve stuck. SYMPTOM 12 - Drives in D but immediately upshifts to 3rd FAULT - 2nd to 3rd shift valve stuck. SYMPTOM 13 - With D selected vehicle starts in 2nd FAULTS POSSIBLE - 1st and 2nd shift valve stuck. Governor sleeve sticking. SYMPTOM 14 - With D selected vehicle starts in 3rd FAULTS POSSIBLE - 1st to 2nd and 2nd to 3rd shift valves stuck. Governor sleeve sticking.SYMPTOM 15 - No kickdown 4th to 3rd FAULT - 4th to 3rd kickdown valve stuck. SYMPTOM 16 - Upshifts/downshifts and kickdown shifts at incorrect road speeds Check throttle kickdown cable adjustment Carry out main line pressure check ·Normal pressure FAULT - Governor valve sticking ·Incorrect pressure FAULTS POSSIBLE - Incorrect throttle valve adjustment Primary regulator sticking SYMPTOM 17 - No upshifts at light throttle FAULTS POSSIBLE Governor valve sticking Shift valves sticking SYMPTOM 18 - No engine braking 3 selected 3rd gear FAULT - Clutch C SYMPTOM 19 - Delayed or no downshift occurs when making a manual selection from 3 to 2 FAULTS POSSIBLE - 2nd and 3rd upshift valve sticking. Governor valve sticking. 2 Position interlock valve sticking. SYMPTOM 20 - At speeds below 28 mph (45 kph) when making a manual selection from 2 to 1, downshift is delayed or does not occur FAULTS POSSIBLE - Governor sticking. 1st to 2nd shift valve sticking. 1 Position interlock valve sticking. SYMPTOM 21 - 1 Selected 1st gear no engine braking FAULT - Clutch brake 3 SYMPTOM 22 - 2 Selected 2nd gear no engine braking FAULT - Clutch brake 1 SYMPTOM 23 - Vehicle drives forward in N FAULT - Clutch A stuck
AUTOMATIC GEARBOX 1 ADJUSTMENT KICKDOWN CABLE ADJUSTMENT Service repair no - 44.30.02 1.Release and remove kickdown cable clevis pin. 2.Loosen locknut and release kickdown cable from abutment bracket. 3.Release outer cable sleeve from clip on rear of LH cylinder head. 4.Holding cable as straight as possible, extend inner cable to first detent. 5.With inner cable extended, check dimensionA between end of threads and crimped sleeve. DimensionA=42mm±3 mm (1.65±0.10 in). 6.Connect cable to abutment bracket and fit locknut. 7.Secure outer cable sleeve to clip on rear of LH cylinder head. 8.Connect kick-down cable to throttle lever and secure with clevis pin.9.Adjust outer cable until crimped sleeve is dimensionBfrom end of outer cable. DimensionB= 1 mm (0.04 in). 10.Tighten locknut.
AUTOMATIC GEARBOX 1 REPAIR KICKDOWN CABLE Service repair no - 44.15.01 Remove 1.Site vehicle on a four post ramp. 2.Select neutralN. 3.Disconnect battery negative lead. 4.Remove clevis pin and release kickdown cable at throttle linkage. 5.Release outer cable locknut. 6.Disconnect cable from abutmet bracket. 7.Release cable from retaining clip at bracket attached to cylinder head. 8.Feed cable through to underside of vehicle. 9.Raise vehicle on ramp. 10.Remove gearbox fluid pan. See Fluid pan gasket and screen. 11.Remove 13 bolts securing control unit assembly to gearbox. 12.Rotate accelerator cam and release nipple of kickdown inner cable from cam. 13.Using special toolLRT-44-004, compress cable tangs and remove cable from gearbox. 14.If cable is to be refitted, remove and discard O ring seal and clean cable assembly. Refit 15.Fit NEW O ring seal to cable and lubricate seal. 16.Fit cable to gearbox casing ensuring it is correctly seated. 17.Spring load cam by turning once and fit inner cable nipple into cam seat. NOTE: When a new cable is fitted, to help locate nipple to cam, introduce a curve into the cable. DO NOT bend or kink cable. 18.Ensuring cable nipple remains engaged, feed free end of cable assembly into engine compartment. 19.Locate control unit assembly to gearbox and loosely fit 13 bolts. Ensure selector shaft locates into gear shift fork.