Transmission Will Not Engage in Any Gear on a 350 Transmission Fluid Dark and Smells Burnt UPDATED

Transmission Will Not Engage in Any Gear on a 350 Transmission Fluid Dark and Smells Burnt

Common Fixes for a Transmission that Shifts Difficult

An automated transmission can shift hard, wiggle or hesitate for a number of reasons. Here's what to look for to...

Here are a few common reasons why your manual may shift hard, jerk or hesitate.

• Depression fluid level
• Depleted fluid frictional backdrop
• Poor common cold-temperature fluidity

Start with the easiest set

There's an old adage when troubleshooting: showtime with the least expensive and simplest prepare.

In this case, cheque the transmission fluid level first. Low fluid can lead to a transmission that shifts difficult.

Information technology's important to find out why the fluid is low and prepare any problems. Information technology could be a leaky seal or other mechanical defect. Otherwise, adding new fluid won't ultimately solve the problem.

Worn fluid can pb to hard shifts

Manual fluid that has aged and lost some of its frictional properties can besides lead to poor shift quality.

When your vehicle'south computer tells the transmission to shift gears, hydraulic pressure (provided by the fluid) squeezes a serial of plates together inside a clutch pack to connect the engine to the manual output shaft and route power to the wheels. The fluid's frictional properties play a vital role in ensuring the clutch plates bind together properly and gear shifts occur seamlessly.

Over time, the fluid's frictional properties can degrade, leading to hard, hasty or inconsistent shifts. In this example, it's time for a fluid change.

How do yous know for sure the fluid is worn?

The only definite way to detect out is to conduct used fluid analysis. Withal, fluid that smells burnt or appears dirty is probable due for a change. You lot can opt for a transmission flush or pan driblet.

Information technology'south best exercise to change the fluid before the frictional properties are depleted and yous feel poor shifting.

Those poor shifts can cause the clutches to wearable more speedily and lead to bigger issues that need mechanical repairs.

Exist enlightened of "adaptive" transmissions

One interesting note affects newer vehicles equipped with adaptive transmissions.

These units "learn" your driving habits and the characteristics of the fluid to arrange shifts accordingly. As the fluid loses its frictional properties, the figurer compensates and adjusts transmission performance.

If you lot've recently changed your fluid, the computer may yet operate every bit if old fluid is installed, causing poor shift quality. In these cases, keep driving and eventually the computer will "relearn" your driving habits and the behavior of the new fluid and adjust accordingly. The problem was meaning enough on some 2012-2013 Ford F-150s to crusade Ford to consequence a technical service message (TSB thirteen-ane-x).

What do "frictional properties" look like?

Nosotros know what proficient, well-baked shifts feel similar. Can we dive in even further and come across what they look like?

We can, and they appear as a apartment, boring line on a graph.

The nighttime blue line represents the frictional properties of new AMSOIL Signature Series Synthetic Automatic Transmission Fluid. The light blueish line shows the frictional properties of the same fluid after more than than 180,000 miles in taxi cabs operating in the intense heat of Las Vegas.

Every bit you can see, the lines are extremely close, with no abrupt spikes or dips. This ways, afterwards 180,000 miles of severe service, the fluid continued to evangelize crisp, confident shifts.

Granted, information technology'due south not exciting to look at – unless you beloved driving and want to protect your transmission.

Common cold conditions tin lead to a transmission that shifts hard

When the temperature drops, manual fluids with poor cold-menstruum properties tin can thicken and crusade elongated and hard shifts until the fluid has warmed up enough to flow properly.

Switching to a high-quality synthetic transmission fluid volition aid.

Synthetics don't comprise waxes, equally conventional fluids do, meaning they remain fluid at lower temperatures for improved shifts during common cold weather.

The best transmission fluid bachelor won't fix a broken manual. But using high-quality synthetic fluid tin can help improve shift quality and maximize transmission life.

Originally published June five, 2017.

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Transmission Will Not Engage in Any Gear on a 350 Transmission Fluid Dark and Smells Burnt UPDATED

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