Trans & Converters Flashcards
3 basic elements of a torque converter
Pump/ impeller
Stator
Turbine
Describe a Pump impeller
Turned by engine
What is the Stator
Splined to a ground sleeve has a one way clutch
Where is the Turbine
Splined to input shaft of transmission
What way does a torque converter rotate
Counter clockwise
What is coupling
When everything is moving as one unit
Components of AMT
Torque converter
Multi disc clutches
Planetary gearing compounded
Hydraulic circuitry
What is Hydro dynamic
Low pressure high flow
Torque converter connecting members
Transfers torque , multiplies torque , dampens torsional vibrations
What are the Two oil flow phases
Vortex
Rotary
What is Vortex flow
Torque multiplied, fluid forces into a vortex only if stator is stationary
What is Rotary
Coupling phase
Stator is free to move , rotary flow
Describe Drive and driven in torque converter
Impeller drive
Turbine driven
Gives power output to transmission
What is the Stator operation
One way clutch
Faster oil flow and higher torque moves stator
Hydrostatic
High pressure low flow
Average torque multiplication
2:1
Over running clutch types
Spring and rollers
Sprag clutches
Stall speed
Max engine rpm when engine is at full throttle, turbine is stationary
Stall test precautions
Don’t stall test in reverse
Don’t test longer than 30 seconds
Oil temp under 300 degrees
Stall test spec are out by 200 rpm
Tranny slipping
Oil level Low
Oil level too high
Oil airated
If stall test fine but high fluid temp
Stator May be stuck
Cooler may not be operating
Engine cooler not working
Free wheel stator
Low speed starts
No power low speeds
Elevated oil temp
Stuck stator
High fluid temp
Not reaching top speed
3 phases
Torque multiplication
Coupling phase
Lock up
Low power complaint
Stator , do stall test
Tranny fluid
Designed per tranny for differ t materials that need to be lubed
Clutch assemblies and clutch packs
3 steel 3 friction
5 steel 5 friction
Clutch assembly
Allows for the transfer of torque through planetary gearset
Torque transfer and brake Device
Two types of clutch Discs
Friction and steel reaction discs
Steel reaction discs
Stationary , don’t rotate
Actuating Piston assembly’s are
Hydraulically actuated to apply clutch
Max difference in speed = Max ____
Torque multiplication
Stall tests can be within how many RPM
150
Max oil temp
300F
Retarder
Is for breaking
Forward clutch used for
For any forward speed
Trimmer valve
Shift shock
Absorbing pressure spike
Modulater valve
Senses throttle position
Affects shift timing
Spring tension hydraulic pressure
Highest at idle
Signal valve
Sends signal to relay
Controls minimal flow
Sends signal to apply clutch
Trimmer between signal and relay in parallel
Governor
Source for main pressure
Highest at road speed
Senses road speed through resistance
Higher spring tension on_______
Higher gears
First gear
Selector valve
Priority valve
One way check valve
Makes sure pressure is there for shifting
Keeps pressure
Over filling causes
Airation
Under full
Low power
Hot
Clogged breather
Force oil up into fillertube
And cause unaccurate reading
Only sealant in tranny
Petro Jelly
Check govener filter when?
Every service
Check breathers
Every service
Oil begins to oxidize at what temp
150F and every 25 after decreases life by 50%
Hydro mechanical
Non electric spring spoil valve body
Mechanical and hydraulic controlled only
Tranny oil pump
Positive displacement
Oil moves to pump from?
Atmospheric pressure 14.7 at sea level
Air ration causes
Cavitation
Pressure caused by
Restriction
Relief valve
Maintains pressure , reroutes to inlet
Flow rate changed by
RPM
PTO
set up on trans off of forward clutch housing
Rotated at turbine speed
Bigger trans PTO
PTO off of pump speed determined by engine
4 speed is how many planetary
3
5 speed has how many planetary
4 planetary, added planetary at back of trans for low gear
Converter lock up
Locks turbine to case
Eliminates slipping , all turns same speed
Split guide ring
Reduces turbulence and guided oil
Before a Stall test
Check oil
Install temp gauge before cooler
Stay below 300F
Get spec for RPM
Spec for gear selection
500 rpm above on stall test
Slipping clutch
Airtated oil
Not enough pressure
Under by 200 rpm on stall test
Stator free wheeling
Low oil
Confirm by road test
After stall test procedure
Put in N
12-1500 rpm
Let cools down
Oil not cooling down but goo stall test
Stuck stator, road test would show good take off no top speed
Fluid coupling / torque converter
Fluid coupling
No stator
Straight blades
Torque converter
Curved blades
Stator
Vortex flows
Between turbine and impeller
Off road has a what kind of stator
Fixed
High way has what kind of stator
Rotating stator
Vortex flow does what to stator
Locks it
Frictions plates do what
Transfer torque, lots of them because it needs lots of surface area
Max forward reduction
Smallest driving largest
Minimum forward reduction
Ring input sun output
Max overdrive
Carrier input ring held
Sun output
Slow reverse
Hold carrier
Ring driving sun - fast
Sun driving ring -slow
PTO has a clutch or no
No driven by turbine
Lock Up clutch splined to
Housing
Pump hub inspection points
Seal ring groove
Front seal rings
Pump drive flange
Lock up in what gear
Over drive
Pump turns at same speed as ______
Engine
Input shaft locks and turns ?
Main shaft attached to sun gear when forward clutch engaged.
Lock everything
How many ratios in planetary
5 forward 2 reverse
When is planetary in Neutral
When there is a input but no held
Direct drive
Locking two- 3 gears together
3 phases
Torque multiplication
Coupling
Lock up
Inhibitor valve
Prevents down shift from second to first when road speed is to high
Lock up circuit
Controlled by modulater valve
Which retarder is located between torque converter and trans gearing
Input retarder
Which retarder applies friction clutch while charging
Output retarder
