Question about 1991 Subaru Legacy
Trans model is a 4EAT.Subaru's version of the Nissan RE4RO1A.I would go after the solenoids first.Codes are pulled manually on that car with a procedure involving turning the ignition key on,moving the shifter,key off,move the shifter,key off..etc.Thats how trans codes are pulled out of the vehicle,and it is an exacting procedure as prescribed by Subaru.That is the very first step,as diagnositc codes will lead you in the direction of the malfunction.However,those trans' are known for problematic solenoids,and i replace the solenoids with new on every overhaul i perform.The ones on your car should be click checked with 12 volts,ohms checked,and amps checked.If the solenoids pass testing,then likely an internal trans problem.Back to the codes FIRST though.As a final resort,before removing trans from vehicle,remove trans pan and visually inspect.If lots of metal,you have internal problem.
Posted on Jul 13, 2008
Take it in & have it scanned, may only be a faulty solenoid or even brake switch may cause code & symptoms. Sooner you get it in, the cheaper it will probably be to repair it
Posted on Sep 08, 2009
SOURCE: Audi Automatic gearbox
gears do not engage on audi a4
Posted on Sep 21, 2009
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Posted on Jan 02, 2017
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Mar 17, 2017 | Cars & Trucks
1-2 Shift Solenoid Valve
3-4 Shift Valve Bore Plug
Burned, slipping, missing
4th Servo Cover
4th Servo Pin
4th Servo Piston
4th Servo Seals
Rolled, cut or damaged
Slipping or No Fourth Gear
Slipping or No Fourth Gear Checks
DEFINITION: A large engine RPM increase is noted in fourth gear, Drive range, with little or no vehicle forward speed increase. First, second, and third gear operation are normal. Shifts into fourth gear are soft or do not occur. Fourth gear ratio is 0.705:1.
Automatic Transmission Fluid Level
Low fluid level
Transmission Main Line Pressure
Low transmission main line pressure
Oil Filter Assembly
• The oil filter assembly (100) is missing, plugged, or damaged.
• The oil filter seal assembly (101) is missing or is damaged.
Control Valve Body Assembly
• The 3-4 shift valve (362) or the 4-3 manual downshift valve (360) is stuck or binding.
• Debris is found in the passages of the control valve body (301) or of the control valve body spacer plate and gasket assembly (396)
Case Cover Assembly
Distortion or damage occurs at the manual valve (404) or at the case cover (401), causing PRN oil leak.
Driven Sprocket Support Assembly
A plugged third clutch oil passage in the driven sprocket support assembly (609)
Fourth Clutch Assembly
• The clutch plates (500-502) are worn, damaged, or misassembled.
• A missing or not seated fourth clutch spring retaining ring (601)
• A damaged spring assembly (602) or piston (603)
• Worn or damaged fourth clutch piston seals (604, 605)
Third Clutch Sprag Assembly
• The sprag (720) was misassembled or backwards on the inner race (661).
• A damaged third clutch sprag assembly (653, 661, 719-721)
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