Manual Transmission Systems - Front Engine Front Wheel Drive
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Questions and Answers

What is the primary difference between a front engine front wheel drive transmission and a front engine rear wheel drive transmission?

  • The number of shafts
  • The location of the final drive/differential assembly (correct)
  • The type of clutch used
  • The type of gear ratios used
  • What is the term often used to refer to a front engine front wheel drive transmission?

  • Final drive transmission
  • Transaxle (correct)
  • Front wheel drive transmission
  • Transverse gearbox
  • How are some assemblies mounted onto the gearbox shafts?

  • By being cast directly onto the shaft (correct)
  • Through the use of synchromesh
  • By being bolted onto the shaft
  • Through the use of needle roller bearings
  • What is the purpose of the output shaft in a front engine front wheel drive transmission?

    <p>To mesh directly with the final drive/differential ring gear</p> Signup and view all the answers

    In which module can you find more information on propshafts?

    <p>LV12 - Drive Shafts</p> Signup and view all the answers

    What is the mounting orientation of the transmission in a front engine front wheel drive vehicle?

    <p>Transversely</p> Signup and view all the answers

    In a front engine front wheel drive transaxle, which gear is typically associated with the sliding mesh?

    <p>Reverse gear</p> Signup and view all the answers

    What is the purpose of synchromesh mechanisms in manual transmission systems?

    <p>To synchronize gear rotation</p> Signup and view all the answers

    In a torque flow diagram, what is the primary input component?

    <p>Input shaft</p> Signup and view all the answers

    What is the primary function of the clutch in a manual transmission system?

    <p>To disconnect the engine from the transaxle</p> Signup and view all the answers

    In a transaxle design, what is the purpose of the ring gear?

    <p>To transmit power to the wheels</p> Signup and view all the answers

    What is the typical gear selection sequence in a manual transmission system?

    <p>1st, 2nd, 3rd, 4th, 5th</p> Signup and view all the answers

    What is the purpose of synchroniser assemblies in a front engine rear wheel drive transmission?

    <p>To prevent gear crunching by synchronising gear speeds</p> Signup and view all the answers

    What is unique about the reverse idler gear in a front engine rear wheel drive transmission?

    <p>It does not use synchromesh</p> Signup and view all the answers

    What is the purpose of snap rings and spacers in a front engine rear wheel drive transmission?

    <p>To keep assemblies in lateral alignment</p> Signup and view all the answers

    What do the gears (except the reverse idler gear) remain in with each other in a front engine rear wheel drive transmission?

    <p>Constant mesh</p> Signup and view all the answers

    What is the effect of locking individual gears to the shafts in a front engine rear wheel drive transmission?

    <p>Gear selection</p> Signup and view all the answers

    What is the purpose of the clutch in a front engine rear wheel drive transmission?

    <p>To disconnect the engine from the transmission</p> Signup and view all the answers

    Study Notes

    Front Engine Front Wheel Drive vs. Rear Wheel Drive

    • Front engine front wheel drive (FFWD) transmissions are typically known as transaxles.
    • FFWD transmissions have the gearbox and differential integrated into a single unit.
    • FFWD transmissions have a transverse mounting orientation, with the output shaft pointing towards the side of the vehicle.
    • FFWD transmissions often use a sliding mesh gear for the reverse gear selection.
    • FFWD transmissions use an output shaft to transmit power directly to the front wheels.
    • Rear engine rear wheel drive (FRWD) transmissions have separate gearbox and differential units.
    • FRWD transmissions have a longitudinal mounting orientation, with the output shaft pointing towards the rear of the vehicle.
    • FRWD transmissions use a propshaft (driveshaft) to transmit power from the gearbox to the differential.
    • FRWD transmissions use synchroniser assemblies to facilitate smooth gear changes.
    • FRWD transmissions utilize snap rings and spacers for precise gear positioning and shaft assembly.
    • FRWD transmissions typically have a reverse idler gear which rotates in the opposite direction to the main shaft.

    Transmission Components and Functions

    • Synchromesh mechanisms allow for smooth gear changes by synchronizing the speeds of the gears before engagement.
    • Output shaft transmits power from the gearbox to the differential or directly to the wheels.
    • Clutch disconnects engine power from the transmission, allowing for gear changes and vehicle start/stop.
    • Ring gear in a transaxle is part of the differential and is responsible for power distribution to the wheels.
    • Clutch in a FRWD transmission disconnects engine power from the gearbox.
    • Reverse idler gear in a FRWD transmission is used to change the direction of rotation for reverse gear operation.
    • Gear selection sequence in a manual transmission follows a specific pattern for engaging different gears.
    • Prop shafts are covered in a dedicated module and are used in FRWD transmissions to transfer power to the rear axle.

    Assembly and Arrangement

    • Gearbox shafts are often fitted with bearing assemblies, seals, and other components that allow for smooth rotation and prevent leakage.
    • Gears in a FRWD transmission (excluding the reverse idler gear) are typically locked to the shafts for power transmission.
    • Gears in a FRWD transmission can be locked individually to the shafts for specific gear ratios and operation.

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    Description

    Identify the major components of a manual transmission system in a front engine front wheel drive vehicle. Learn about the transmission case, clutch housing, input shaft, final drive/differential assembly, output shaft, and transmission case cover. Compare with front engine rear wheel drive transmissions.

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