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Home / DTC / P0735 — Incorrect gear ratio 5

P0735 — Incorrect gear ratio 5

Detailed page for trouble code P0735.

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Code

P0735

LAND ROVER P — Powertrain

Incorrect gear ratio 5

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 16 EN: 44 RU: 43
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Low or contaminated transmission fluid
  • Worn or damaged 5th gear clutch pack or band
  • Faulty shift/pressure solenoid(s) or valve body fault
  • Defective input or output (vehicle) speed sensor
  • Wiring or connector fault between TCM and transmission components
  • Torque converter or internal mechanical damage (planetary gears, shafts)

Symptoms

  • MIL/Check Engine lamp illuminated
  • Transmission does not engage 5th gear or slips in 5th
  • Harsh, delayed or erratic shift into/through 5th gear
  • Vehicle stuck in lower gear or enters limp-in mode
  • Reduced fuel economy at cruising speeds
  • Unusual transmission noises under load

What to check

  • Scan for stored codes and freeze-frame data; note any related transmission codes
  • Road test while monitoring live data: engine RPM, input speed, output speed, requested gear, actual gear and calculated gear ratio
  • Check transmission fluid level, color and smell; look for metal debris on fill/drain pan or magnet
  • Inspect wiring and connectors at input/output speed sensors, solenoids and TCM for corrosion, chafing or poor pins
  • Compare actual input/output speed ratio to expected 5th gear ratio in live data
  • Check for additional codes that indicate solenoid, pressure, or sensor faults

Signal parameters

  • Engine RPM (EGT/RPM)
  • Transmission input speed (Turbine/INPUT_SPEED)
  • Transmission output/vehicle speed sensor (VSS/OUTPUT_SPEED)
  • Requested gear / commanded gear from TCM
  • Actual/current gear or shift state
  • Calculated gear ratio (input/ output)

Diagnostic algorithm

  1. Connect a professional scan tool; record trouble codes and freeze frame data
  2. Verify fluid level, condition and correct fluid type; correct level if needed and retest
  3. Perform a controlled road test while monitoring input and output speeds and the calculated gear ratio in 5th; confirm ratio discrepancy
  4. Inspect wiring/connectors for speed sensors and solenoids; wiggle-test while monitoring live data for intermittent changes
  5. Test input and output speed sensors: resistance, supply voltage and signal waveform; replace if faulty
  6. Check shift solenoid resistance and activate solenoids with a bi-directional scanner; verify proper operation and duty cycles
  7. If solenoids and sensors OK, check line/rail pressure with a gauge to verify hydraulic pressure meets spec under 5th gear conditions
  8. Inspect valve body and filter for contamination, stuck valves or debris; replace filter and clean if contaminated
  9. If hydraulic and electrical systems check OK, suspect internal mechanical wear (clutch pack, band, planetary gears) — consider transmission removal/inspection or rebuild
  10. Check for TCM software updates or calibrations and reflash if manufacturer guidance exists
  11. Clear codes and perform verification road test after repairs

Likely causes

  • Low transmission fluid level or wrong fluid type
  • Faulty shift solenoid affecting 5th gear engagement
  • Worn clutch pack or friction material for 5th gear
  • Failed input or output speed sensor giving wrong speed data
  • Valve body or internal hydraulic failure producing incorrect line pressure

Fault status

⚠️ Status
P0735 — TCM reports incorrect gear ratio for 5th gear: actual input/output speed ratio does not match expected 5th gear ratio.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 2-8 hours

Similar codes

P0730 P0731 P0732 P0733 P0734 P0736
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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