Which transmission does yours have 4T65-E or 4T80-E ?
Checks
Causes
1-2 Shift Solenoid Valve
3-4 Shift Valve Bore Plug
Misassembled
4th Band
Burned, slipping, missing
4th Servo Cover
Cracked
4th Servo Pin
Broken, seized
4th Servo Piston
Damaged
4th Servo Seals
Rolled, cut or damaged
4T80-E
No Fourth Gear
?€¢
Inoperative
?€¢
Debris
?€¢
Pinched wires
4T65-E
Slipping or No Fourth Gear
Slipping or No Fourth Gear Checks
Cause
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)
SOURCE: Hyundai Santa Fe 2005 won't shift into first gear
Most likely the o-ring seal between the torque converter and the transmission is going bad. Get that transmission rebuilt pronto before serious damage is done! But first, have a mechanic drop the transmission pan and look for signs of a very thin silvery film coating the inside of the pan. If found, then the transmission definitely will have to be rebuilt, and the torque converter will also have to be replaced since embedded metallic particles in the old torque converter will eventually come loose, due to wear of the clutch plates within the torque converter, and eat up the rebuilt transmission. Now, here is the deal once the transmission has been rebuilt:
Change the transmission fluid and filter once a year -- no matter what! If you do this, then you should never have any more problems with the transmission.
SOURCE: 2005 Pontiac Vibe having trouble shifting 1st 2nd code P2716 MIL
This is most likely due to a bad solenoid pack in transmission. You could have tranny serviced and see if it helps. Poor fluid condition makes valves stick in those.
SOURCE: 4l60e no forward or reverse gears operating
It sounds like your torque converter or the pump is broken.
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