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Nissan Sentra B18 (2020-2025) Service Manual: Differential Side Oil Seal

Exploded View

Exploded View

1.

Differential side oil seal (transaxle case side)

2.

Differential side oil seal (converter housing side)

Removal and Installation

Removal and Installation

REMOVAL

Note:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

Remove front drive shaft. Refer to Removal and Installation (LH) or Removal and Installation (RH).

Remove differential side oil seal (1) using suitable tool (A).

CAUTION:

Be careful not to scratch transaxle case and converter housing.

INSTALLATION

Installation is in the reverse order of removal.

Measure lip height (A) and determine differential side oil seal insertion reference value (B) from the list to calculate lip protrusion (C).

(1)

: Differential side oil seal

(2)

: Converter housing or transaxle case

Lip protrusion (C)

: C=A–B

Differential side oil seal insertion reference value (B):

Transaxle case side

: 1.8 mm (0.071 in)

Converter housing side

: 2.2 mm (0.087 in)

CAUTION:

  • Do not reuse differential side oil seal.

  • Put a mark on the measurement area and measure height of seal lip at four points diagonally using suitable tool.

Note:

Since seal lips have a tolerance of ± 0.3 mm (± 0.012 in) at maximum due to manufacturing tolerances or packing conditions, it is necessary to measure the seal lip height beforehand to clarify the tolerance.

As an indicator of the parallelism and insertion depth, cut a masking tape (1) to specified width [add 1 mm (0.04 in) to the value calculated from the tip of differential side oil seal lip] and affix to the differential side oil seal.

Install the differential side oil seal, using Tools.

Tool number

: :KV31501200 (NI–52281)

Tool number

: :KV31500910 (NI–52282)

Tool number

: :ST35325000 (NI–8092)

CAUTION:

  • If differential side oil seal is inserted deeper than the reference value, use a new differential side oil seal and perform the steps again.

  • Apply CVT fluid to the differential side oil seal lip and around the oil seal.

Remove masking tape.

Adjust as instructed below to optimize the protrusion size and parallelism.

CAUTION:

If differential side oil seal is inserted deeper than the reference value, use a new differential side oil seal and perform the steps again.

  • Protrusion size (A)

    CAUTION:

    Protrusion must fall within ± 0.5 mm (0.020 in) of calculated size.

  • Parallelism at four diagonal points ()

    CAUTION:

    The difference among four diagonal points must be within 0.3 mm (0.012 in).

    Note:

    If differential side oil seal is uneven while installing, tilt suitable tool.

Check that the protrusion size and parallelism are adequate.

Inspection and Adjustment

Inspection and Adjustment

INSPECTION AFTER INSTALLATION

Drive the vehicle and check visually that there is no leakage of CVT fluid. Refer to Inspection.

ADJUSTMENT AFTER INSTALLATION

Adjust the CVT fluid level. Refer to Adjustment.

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