What are the problems with the 4L80E transmission?

The 4L80E transmission problems include the following: 1 Erratic shifting: The 4L80E had shifting problems as a result of a failed throttle position sensor or input/output speed… 2 Overheating: Transmission fluid helps to remove heat generated from the moving internal components in the transmission. More …

What kind of shifter does a GM 4L80E have?

Automatic Shifter, Winters Sidewinder, Forward Pattern Valve Body, Standard Gate, GM, 4L80E, Each Automatic Transmission Shifter, Diablo Series, Cable Operated, Pistol Grip, With Cover, Two Buttons, Each Automatic Shifter, Stealth Pro Ratchet, Magnum Grip, Chevy, Dodge, Ford, Plymouth, Chrysler, Each

Where is the speed sensor on a 1991 4L80E?

For instance, 1991 – 1996 4L80E’s have a speed sensor that is located at the driver’s side rear portion of the case. On the other hand, the 1997 and later 4wd applications may lack the rear sensor.

How much does a 4l80-3fm Auto Shift cost?

Stage 3 – Warranted 1000+ HP Price Build # Build Description $4150 4L80-3A Auto Shift for computer controlled appli $4300 4L80-3FM Full manual forward pattern $5150 4L80-3RMTB Reverse manual Transbrake $4550 4L80-3ATB1 Automatic shift with Manual Low Transbra

What kind of transmission does a Ford 4L80E have?

The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH400 automatic transmission, and is based heavily on the 400 in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls.

How does the clutch work on a 4L80?

It is this clutch that provides the mechanical coupling from the engine to the transmission. The Computer commands this clutch through the torque converter solenoid. The TCC solenoid actuates pilot pressure and sends it to the pump. The pump (in short) puts the pressure on this plate that some call a piston.

What causes OD on a 4L80 diesel?

Since your transmission has 200Ks on it the problem is likely that the valve sleeve bore has worn. When the Torque converter Solenoid strokes the piston the transmission fluid leaks past when hot. The hydraulic signal get so weak that it will no longer activate the control valve within the pump thus kicking in OD.

Why does my 4L80E not downshift to lower gear?

The problem with these are that the solenoid intake port has no screen, which means any debris floating around in the pan can get into the very small inlet hole and jam the solenoid open, forcing fluid flow, which prevents the plunger from sliding in the valve body and hence prevents a downshift to the next lower gear.

When to replace shift solenoids in GM 4L60-E?

TIP 4: If your transmission is slipping, replacing the shift solenoids, even if they’re fried will not solve the slipping issue. The 4L60-E transmissions uses several solenoids and sensors to control/activate its 4 gears.

What to do if your 4L80E is stuck in 2 from 3?

P-R-N-D work, upshifts mostly work, no downshift into 1 from 2 or to 2 from 3, “stuck” in a certain gear: Pull out the wallet and grease pan. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the “A” and “B” solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later).

Is the 4L80E transmission a good or bad transmission?

But while the 4L80E is a strong, heavy-duty transmission, during the first few years of production the 4L80E was not as durable as its design permitted due mainly to faulty parts. As such, most of the 1991-1992 454SS trucks came with 4L80E transmissions that had faulty parts from the factory.

Can a bad speed sensor affect shift timing?

Harsh or improper shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission. This may cause the transmission to shift roughly or more quickly than normal. It’s also common that a problem with these sensors can impact the shift timing,…

No shift into OD under acceleration; OD will not hold under load and can hear or feel trans shift to OD when throttle is let off but slips into 3rd when throttle applied; sudden erratic lugging condition in lower gears when manually shifting: Bad news: this is going to involve a lot more time and money to fix this problem.

What kind of engine was in a 1998 Chevy truck?

By 1998 the Vortec V8 engine was being used in Chevrolet’s line of big horsepower machines. The engine produced 255 to 290 horsepower. Cylinder heads became high flow, a new camshaft, roller valve lifters and a higher compression ratio increased fuel economy.

What kind of fuel mileage does a 7.4 liter truck get?

The 7.4 liter gasoline engine varies in fuel mileage because of the diverse vehicles and diverse circumstances in which the engine can be used. Muscle cars, heavy duty trucks, and motorhomes all differ greatly in what mileage results can be obtained.

What kind of mileage does a 1998 GMC Sierra get?

The 1998 7.4 liter engine, like the one found in the GMC Sierra, with a capacity of 34 gallons of fuel in the gas tank, will get 10 to 14 miles per gallon (mpg). Towing a heavy load, the mileage could drop to 7 to 8 mpg.

Is the Chevy 4L80 compatible with GM engines?

While the 4L80 is generally mechanically compatible with Chevrolet style GM engines, it does require a transmission controller. That controller may be the factory-integrated with the PCM as on 1991-1999 TBI & Gen II engines, with the 1999-2007 Gen III engines, or the 2007+ Gen IV engines.

When was the 1998 Chevy C / K 2500 purchased?

No accident or damage reported to CARFAX. 1st owner purchased on 05/18/98 and owned in ID until 02/28/11 • 1st owner drove an estimated 15,647 miles/year • 2nd owner drove Last serviced at 240,540 miles in Chippewa Falls, WI on 04/02/21 &bull… Accident reported: total loss vehicle.

Are there any transmission problems with a 454SS?

As such, most of the 1991-1992 454SS trucks came with 4L80E transmissions that had faulty parts from the factory. Most of the problems are electronic in nature and are relatively easy, but expensive, to fix. This article deals with fixing your factory 4L80E to make it as durable and reliable as it should have come from the factory.

Where are the force solenoids on a 4L80E?

In addition to the shift solenoids, the TCC, PSM, and force motor solenoids are also suspect of being defective (see above). These are located on the valve body and are as easy to get to as the shift solenoids-but much more costly. The force motor solenoid alone is in the $200 range.

When did the GM 4L80E transmission come out?

Despite its name, the 4L80E is not an upgrade to its GM counterparts. Introduced alongside the original 4L60 in the early 1990’s the 4L80E was designed for large trucks and is designed as a heavy duty unit, rather than a transmission for smaller cars or even some pickups.

What’s the problem with the 4L80-E no overdrive?

The most common problem facing the 4L80-E NO OVERDRIVE and how to deal with it. Not open for further replies. If the problem is electrical then chances are you can troubleshoot the problem yourself. The torque converter has a torque converter clutch. It is this clutch that provides the mechanical coupling from the engine to the transmission.

Why is the shifting valve on my 4L80 not working?

The fluid is blocked at the screen and cannot pass through the screen when the shifting solenoid is engaged. When the electricity is shut off at the computer then the check ball is allowed to back off. When this happens then the shifting valve returns. No electricity sent means no gear.

Is the 4L80E a good car in overdrive?

In overdrive It drives great, as if theres no problem what-so-ever. Shifts smooth and right on time all the way through gears, but overdrive doesnt engage. At 60, I’m pullin close to 2500RPM’s.

How much fluid does a GM 4L60E need?

The 4L60E transmission weighs 146 pounds dry, and 162 wet. It requires 8.4 quarts (9.64″ torque converter) or 11.4 quarts (11.81″ torque converter) of transmission fluid, Below is a list of common transmission problems with the GM 4L60E Transmission and possible solutions to repair.

When did the GM 4L60 E transmission come out?

The 4L60-E is the “E”lectronically shift controlled version of the 4L60. The Late 4L60-E was released in 1997 in and fully phased into wide use through GM by 1998 in both RWD car platforms (including the C6 Corvette) and trucks in both 2wd and 4wd configurations.

What does DTC 79 on a 4L80 do?

It is the Transmission Fluid Temperature Sensor. DTC 79 is transmission fluid Overtemp. A defective temp sensor will prevent overdrive. Use a multimeter between pins L and M to check for resistance. The temperature is related to resistance.

What are the problems with the 4L80E transmission?