Manual Transmission
What does the clutch spline to?
Input shaft
Universal joint
What are the three parts of a torque converter?
Impeller, stator, turbine
What component is the common failure in CVT's?
The belt or band
When operating a manual transmission, what is indicated by a grinding noise when trying to change gears?
Clutch not pressed, clutch not releasing, failing synchronizer
What does the driveshaft spline to?
Output shaft
What is the full name of a CV joint?
Constant Velocity
What controls torque converter lockup?
The torque converter clutch (TCC)
Does a CVT still use a standard torque converter?
Yes
On a RWD vehicle, a customer complains of a vibration at certain speeds. The tires were just replaced. What could cause this vibration?
Out-of balance driveshaft, failing U-joints
Is the torque output of first gear higher or lower than fifth gear?
Higher torque output in lower gears
When making a LEFT turn, which wheels turn faster, thanks to the differential?
The right side (outside) tires
Why is a FWD transmission called a transaxle?
It contains the transmission and differential gear set that powers the axles
What gives a CVT reverse?
The planetary gear set
A customer's vehicle is in limp mode, and will not shift out of 3rd gear. Checking for codes, it shows several related to the shift solenoids. What is a likely cause?
Damaged wiring, solenoid failure, low fluid pressure, TCM internal failure
What component allows for smooth shifts in modern transmissions?
Synchronizers
If a gear ratio is a high number (like 4.10:1), is the torque higher, or the top speed?
Torque will be higher with a higher gear ratio
Name the 4 parts of a planetary gear set
Sun gear, ring gear, planet gears, planet carrier
Give two of the main reasons the CVT is in production.
While test driving a FWD vehicle, you hear a popping noise when turning at slow speeds. What is the most likely cause/faulty part?
CV axle
Which gear in a T56 is the direct drive (1:1)?
4th gear
What is important about driveshaft angles?
They must be equal and opposite to eliminate vibration
How many forward gears would a 4T65E transmission have?
4 forward gears
How do the drums in the CVT affect gear ratio?
Fluid pressure causes the drums to expand or compress, changing the diameter that the belt travels
A vehicle has a harsh downshift from 3-2, but no other issues. A test drive confirms the problem and there are no codes pending. What is the next logical step?
Check fluid level, service history, TSBs