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Vibration at low speed in fourth gear - Vehicle Parts & Accessories

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Going to slow... shift up

Posted on Dec 28, 2013

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2002 pontiac grand am had 1st and 2cnd gear slippage.i replaced the filter and fluid but now i do not have 3rd and fourth gear it will just not change to the gear


Perform ODBII scan. Look for speed sensor fault. Trans has to read speed to know what gear to engage. Could also be a governor problem. Try shifting from low to high gear manually

May 20, 2017 | Pontiac Cars & Trucks

1 Answer

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

No power when I shift into fourth gear and a bad vibration


What gear are you in. Usually in 4th gear you should be at least going 60 mph. If not your lugging the motor. I would check the front motor mount for the vibration too.

Sep 05, 2013 | Harley Davidson Motorcycles

1 Answer

2006 Dodge 2500 Diesel. The RPM gauge will show 3000rpms at 30MPH, basically the gauge is reading erratically.


Are you sure you are not in too low of a gear? Please tell me this is not so. If you are in fourth or fifth gear at low cruising speeds and RPMs do not match the audible sound of your motor, then you could possibly have a bad engine speed/reference sender (Crank and/or Cam), or faulty instrument cluster or ECM/BCM.

Sep 08, 2011 | 2006 Dodge Ram

1 Answer

I am experiencing a vibration (at low speeds) thru


First of all you must check the gear box oil level,secondly see if the the gear box mountings if they are good,if the is cracking on it,it must be replace.

Feb 03, 2010 | 2007 Honda CR-V

1 Answer

The automatic gear have a delay in changing the speed number four in model 94 VR6


Maybe a stupid suggestion, but check the oil amount in the gearbox. It must be done with the motor running. I did´nt know that and checked it motor off when the level on the dipstick was fine. When I checked it motor running it was too low. I filled it up and the gearbox works fine...

Aug 30, 2008 | 1994 Volkswagen Corrado

2 Answers

Gear change vibration


These cars usually have a two piece drive shaft. There is a center bearing in the middle of the driveshaft for support and dampen vibration. It could also be the front rubber coupling where the transmission tailshaft and driveshaft meet. If both are fine try loosening the bolts on the rear transmission mount. Your mounts may be out of alignment allowing for unusual angles between the transmission and driveshaft. Good luck.

Aug 04, 2008 | 2003 Mercedes-Benz E-Class

1 Answer

Power Steering pump appears to be leaking but is full????


Just guessing. Could it be a warped brake disk? That would cause vibration. And vibration in steering might conceivably cause splashing out the power steering reservoir. You would know if the disk were warped by a shudder when you brake at hight speeds.

Jun 17, 2008 | 2000 Buick LeSabre

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