1996 Nissan engine rises up when shift it in to reverse?

A Nissan engine rising when shifting into reverse suggests a problem with the transmission mounts. These mounts are rubber or hydraulic components that hold the transmission securely to the engine and the chassis. When they fail or wear out, they can allow excessive movement, including the engine visibly rising when shifting into reverse. The reverse gear is often under more stress than other gears, making this symptom more noticeable.

Here's what could be happening:

* Worn or broken transmission mounts: This is the most likely cause. They've become degraded over time, losing their ability to properly dampen vibrations and support the weight of the transmission.

* Worn engine mounts: While less likely to directly cause the engine to rise only in reverse, severely worn engine mounts can contribute to overall instability, making the transmission mount issue more pronounced.

* Transmission problems: Though less likely to be the primary cause of the *rising* engine, a problem within the transmission itself (e.g., internal damage, binding) might put extra stress on the mounts, exacerbating the existing issue.

What you should do:

1. Have a mechanic inspect the vehicle: This is crucial. They can diagnose the specific problem and determine the extent of the damage to the mounts or other components.

2. Don't drive the vehicle extensively: Continuing to drive with failing mounts could cause further damage to the transmission, engine, and other parts. The engine's movement is a clear indication of a serious issue.

3. Look under the car (carefully!): If you're comfortable and it's safe to do so, visually inspect the transmission and engine mounts for obvious signs of damage or wear (cracks, tears, significant looseness). However, a professional diagnosis is still needed.

Ignoring this problem could lead to more significant and expensive repairs down the line. Get it checked out by a qualified mechanic as soon as possible.