Re-installation of servoband, servo-piston, servo-washer

no year car told at all wow. 2004 to 2009
2008 last one made USA.
scan the PCM for tranny errors for sure reverse. solenoids and reverse gear is band actviated.
there are 3 gears (at least) called SELECTIONS
PRNDL (or PRND12)
does L work ,car move in loW?
does D work shift up 1,2,3,4? OR SLIPS OR FLARES
OR?
and R fails. well most times that is a bad tranny.
IF ONLY FAILS SAY SO.
IF CAR FAILS IN ALL GEARS MAKE SURE PARK IS NOT STUCK.
the actual box series name is
4-speed 4T65-E automatic


test 1 is make sure shift linkage really does R detent
in the box. AND PARK WORKS AND CAR ROLLS OK IN NEUTRAL.


the shifter goes to R
and reverse lamps glow. AT REAR OF CAR GLOWS.
if yes the reverse band is failing.
the official list in ATSG IS


Automatic Transmission Fluid Level
• Low fluid level
Transmission Main Line Pressure
• Low transmission main line pressure
Manual Linkage
• Misadjusted
Oil Filter Assembly
• The oil filter assembly (100) is missing, plugged, or damaged.
• The oil filter seal assembly (101) is missing or damaged.

Reverse Band Servo Assembly
• A servo piston oil seal ring (43) is missing or is damaged.
• A servo piston (44) is damaged or is stuck in the case bore.
• The servo piston cushion springs (45, 47) or the retainer (46) is missing or damaged.
• The servo piston pin (48) is not engaged to the reverse band assembly (615).
• The reverse band assembly (615) is worn or burned.
• The reverse band assembly (615) is disengaged from the anchor pin (117B) band.
• The anchor pin (117B) is loose or missing.

The Used 2003 Volvo C70 Convertible comes with front wheel drive. Available transmissions include: 5-speed automatic, 5-speed manual.

Fluid level and a dirty filter are the first things to check, then a band adjustment is next on the list. as the pan needs to come off to change the filter adjst the bands at the same time. the tea levels in the bottom of the oil pan will tell you in there are more serious issues inside.

Terry

In the 1998 Dodge Dakota 5.2L V8 if you have only 2nd and 3rd gear with the auto transmission, the solenoid inside for shifting down to 1st gear is not functioning correctly.

A complete transmission rebuild is indicated in this situation, where all of the clutches and solenoids that are bad are replaced.

This involves tearing down the transmission after removing it from the vehicle, and; rebuilding it from the ground up.

Try to find a local transmission repair shop where they are certified to do this kind of work.
----
A basic description of the problem follows:
Servos/Accumulators The servos are hydraulic pistons and cylinders. They resemble the hydraulic actuators used on many other machines, such as bulldozers. Hydraulic fluid enters the cylinder, under pressure, and forces the piston to move to engage the band or clutches.
Servo operation

The accumulators are used to cushion the engagement of the servos. The transmission fluid must pass through the accumulator on the way to the servo. The accumulator housing contains a thin piston, which is sprung away from the discharge passage of the accumulator. When fluid passes through the accumulator on the way to the servo, it must move the piston against spring pressure, and this action smoothes out the action of the servo.
Hydraulic Control System The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.

I'm afraid that the transmission's O/D solenoid malfunctioning or kick down cable may be misadjusted if so equipped.

looking at a rebuilt transmission if you plan to keep the Caravan.

Or, alternatively, could get a low mileage transmission from a salvage yard and have it installed.

----
Servos/Accumulators The servos are hydraulic pistons and cylinders. They resemble the hydraulic actuators used on many other machines, such as bulldozers. Hydraulic fluid enters the cylinder, under pressure, and forces the piston to move to engage the band or clutches.
Servo operation

The accumulators are used to cushion the engagement of the servos. The transmission fluid must pass through the accumulator on the way to the servo. The accumulator housing contains a thin piston, which is sprung away from the discharge passage of the accumulator. When fluid passes through the accumulator on the way to the servo, it must move the piston against spring pressure, and this action smoothes out the action of the servo.
Hydraulic Control System The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.

DRIVE TRAIN

Servos/Accumulators The servos are hydraulic pistons and cylinders. They resemble the hydraulic actuators used on many other machines, such as bulldozers. Hydraulic fluid enters the cylinder, under pressure, and forces the piston to move to engage the band or clutches.
Servo operation

The accumulators are used to cushion the engagement of the servos. The transmission fluid must pass through the accumulator on the way to the servo. The accumulator housing contains a thin piston, which is sprung away from the discharge passage of the accumulator. When fluid passes through the accumulator on the way to the servo, it must move the piston against spring pressure, and this action smoothes out the action of the servo.
Hydraulic Control System The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.

NO: 43-37
DATE: 2-25-2003
MODEL: MY 2001-2002 S60, V70, V70 XC
SUBJECT: Shift Quality Issues due to B4 Servo Cover Failure, 2-3 upshift harshness or flare
CHASSIS: These chassis breaks are approximate:
S60: 062000-152000
V70: 116000-230000
V70 XC: 036000-067100
TRANSMISSION SERIAL NUMBER: The first 3 digits of the serial number on the affected transmissions will be between 01C (March 2001) and 01L (December 2001).
DESCRIPTION:
In the AW 55-50, brake number four (B4), is only applied in 3rd gear. The B4 is applied by a piston, which is covered by an aluminum cap. This cap has a steel washer crimped to its inside surface, and a rubber cushion that sits between the cover and the washer.
If this washer breaks free from the crimps it will become concaved because of the B4 piston return spring pressure.
This loose washer can cause: - " 2-3 upshift flare / slip - " Harsh 2-3 upshifts - " 3-4 upshift flare / slip - " Harsh 4-3 downshifts
Replacing the broken B4 cover with a new one (PN 30651771) will remedy these symptoms.

sounds like the torque converter seal is leaking the trans will have to be removed for this

Make sure that you have the transmission software updated. Volvo has had many upgrades on their transmission's control software to address these exact symptoms.

Bret
RepairPal.com

Your vehicle should have the A4LD trans.Some of those small Bronco's had C-5....3 speed,lockup trans in them.If yours is indeed the O.Drive trans,4th gear in that trans is totally mechanical and hydraulic control.The only electricals in that year trans is lockup apply inside the torque convertor,and that happens after the 3-4 upshift.Later version DID have a solenoid for 4th gear.4th gear consists of the Forward clutch pack applied,and the front band,or O.D. band.This band is applied with a servo piston.It is a steel core piston with a pin and a rubber bonded covering with molded in lip seals.These servos are known for the rubber hardening,and no longer applying the band.Sometimes the band gets burnt to the point of no good,but installing a new piston is possible without removing the trans.Other than the servo piston,or without checking the valves in the valvebody,pretty much the trans would have to come out and be inspected.Good luck.j