Will not shift into 4th gear - 2004 Chevrolet Aveo

There could be several reasons why a 2008 Astra may become stuck in 4th gear. Here are a few potential causes:

1. Transmission issues: A problem with the transmission itself, such as a damaged gear or a malfunctioning shift solenoid, can cause the vehicle to remain stuck in a particular gear.

2. Clutch problems: If there is a problem with the clutch system, such as a worn clutch disc or a faulty release bearing, it can prevent proper gear engagement and cause the vehicle to stay in 4th gear.

3. Shift linkage or cables: Issues with the shift linkage or cables that connect the gear shift lever to the transmission can result in difficulty changing gears, including becoming stuck in 4th gear.

4. Hydraulic issues: Problems with the hydraulic system, such as low fluid levels, leaks, or a malfunctioning clutch master or slave cylinder, can affect the proper operation of the clutch and transmission, potentially causing gear-related issues.

It is important to have a qualified mechanic inspect and diagnose the specific cause of the problem. They can perform a detailed diagnostic procedure, check for error codes in the vehicle's computer system, and conduct necessary tests to identify and resolve the issue with the 4th gear sticking.

double posted same car same problem but this time a new Key clue.
what do you mean out of 4th gear.
learn the tell a drivers evidence hear,
PRNDL123,can';t move the LEVER here
or the auto trans (none told or engine or country told)
the A/t fails to up shift 3 to 4, in Drive,?
or trans is stuck in 4th drive. no matter what I do, even in Reverse I get 4th gear forward?

1: check all fuses first./
2: scan the PCM and report all DTC errors and skip none set.


shifting out of 4th gear

what does that mean, I am clueless. 4>3 down shifts fail?

Which transmission does yours have 4T65-E or 4T80-E ?

4T80-E
No Fourth Gear

Checks

Causes

1-2 Shift Solenoid Valve
?€¢
Inoperative
?€¢
Debris
?€¢
Pinched wires

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
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)

05 Chrysler pacifica is a 4 speed automatic, next time buy a car with a 5 speed automatic

check and replace the TCM

The problem is inside the box, could be a sliding sleeve and gear

Does that transmission have external shift linkage? Sounds like a linkage broke or the neutral gate is way off.

Hi,

This might be because of the gear box problem. By any chance, did your car face flooding? In such cases, please drain the gear box and replace it with new gear fluids. Also, check if you go in low speeds, you might be able to engage it with ease. Please come back to me if you feel this doesnt solve your issue.

Regards,
Hari

Hi All

I have a s40 1.9d / 2000 plate,
In the last month or so the car loses revs when changing up to 3rd and 4th gear, I can only get 50 mph max in 3rd gear 80mp in 4th.
The car has just clocked 185,000 miles
Its a great car but a pai at the moment, I've had a service including fuel fillter change added fuel cleaners to the deilsel all to no avail


Any suggestions