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2000 pontiac bonivile will not shift to 4th gear

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My 2005 Pontiac Bonneville GXP will not shift into 4th gear I was to it was a fourth gear band but is that the only problem that will cause itI'notto shift into 4th gear


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)

Dec 06, 2015 | Pontiac Cars & Trucks

1 Answer

I have a 2000 hundai accent and when i shift into 4th gear it pops back out again


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

Jun 25, 2012 | 2000 Hyundai Accent

2 Answers

Wont go into overdrive> and wont take off in the right gear


You have to scan it. The transmission is shifted by the computer and if it detects a problem, it defaults to 2nd gear and will not shift.

Can't do anything more without codes.

Aug 08, 2009 | 2000 Pontiac Firebird

1 Answer

Hang up in third gear loss of power


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

Jul 06, 2009 | 2000 Volvo S40

1 Answer

2000 Pontiac Gran Prix Auto Trans 3500 rpms at 65 hwy driving


get the codes on trany OBD2. what does the over drive button is saying on the dash Vitally

May 22, 2009 | 2000 Pontiac Grand Prix

1 Answer

1998 GT shifts in all gears except 4th


if it is shifting fine through all gears but fourth then it is probably a syncronizer

May 10, 2009 | 2001 Pontiac Sunfire

2 Answers

2000 toyota echo, transmission won't shift to 4th


First thing to do is check the fluid level if that ok you may want to think about having the transmission filter and fluid changed, there are other possibilities but check these first

Mar 17, 2009 | 2000 Toyota ECHO

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