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Nissan Sentra B18 (2020-2025) Service Manual: System Description

Component Parts

Component Parts Location

Component Parts Location

A.

Transaxle assembly

No.

Component

Function

1.

Position switch

  • It detects that the transaxle is in neutral.

  • It detects that the transaxle is in reverse.

Structure and Operation

Sectional View

Sectional View

1.

3rd input gear

2.

3rd-4th synchronizer hub assembly

3.

4th input gear

4.

5th input gear

5.

5th-6th synchronizer hub assembly

6.

6th input gear

7.

Transaxle case

8.

6th main gear

9.

5th main gear

10.

4th main gear

11.

3rd main gear

12.

2nd main gear

13.

1st-2nd synchronizer hub assembly

14.

1st main gear

15.

Differential

16.

Final gear

17.

Mainshaft

18.

Input shaft

19.

Clutch housing

20.

Reverse idler shaft

21.

Reverse input gear

22.

Reverse output gear

System Description

System Description

TRIPLE-CONE SYNCHRONIZER

Triple-cone synchronizers are adopted for the 1st and the 2nd gears to reduce operating force of the shifter lever.

1.

: 1st main gear

2.

: 1st-2nd coupling sleeve

3.

: Insert key

4.

: Outer baulk ring

5.

: 2nd main gear

6.

: Synchronizer cone

7.

: Inner baulk ring

8.

: 1st-2nd synchronizer hub

REVERSE GEAR NOISE PREVENTION FUNCTION (SYNCHRONIZING METHOD)

Reverse gear assembly consists of reverse input gear, return spring, reverse baulk ring, and reverse output gear. When the shifter lever is moved to the reverse position, the construction allows smooth shift operation by stopping the reverse idler shaft rotation by frictional force of synchronizer.

1.

: Reverse fork rod

2.

: Reverse output gear

3.

: Return spring

4.

: Reverse baulk ring

5.

: Reverse input gear
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