CV axle seal

  • 2.5L
  • 4 CYL
  • 2WD
  • 108,000 MILES
My car is leaking a little bit of transmission fluid it looks like it is coming from where the axle meets or connects to the transmission.
Do you
have the same problem?
Thursday, March 11th, 2021 AT 12:28 PM

1 Reply


I looked at your pics and agree. It looks like the axle seal is leaking. Actually, it's called a differential seal.

To replace it, you need to first remove the axle assembly. I will provide directions for both. First, I will give you the directions for removal. Looking at the pic, I believe it is the passenger side I'm seeing. If that isn't correct, let me know.

Here are the directions. The pics below correlate with the directions.

2007 Nissan-Datsun Altima L4-2.5L (QR25DE)
Right Side
Vehicle Transmission and Drivetrain Drive Axles, Bearings and Joints Axle Shaft Assembly Service and Repair Removal and Replacement Front Axle Right Side
Removal and Installation (Right Side)

Exploded View FAX-10 (Part 1)

pic 1

Exploded View FAX-10 (Part 2)

pic 2

Exploded View FSU-13 (Part 1)

pic 3

Exploded View FSU-13 (Part 2)
imageOpen In New TabZoom/Print
pic 4

1. Remove wheel and tire using power tool.
2. Remove wheel sensor from steering knuckle.
3. Remove cotter pin. Then remove lock nut from drive shaft using power tool.
4. Remove brake hose lock plate. Then remove brake hose from strut.
5. Remove the lower ball joint pinch bolt using power tool, then separate lower ball joint from steering knuckle. Refer to Exploded View FSU-13.

Pic 5

6. Remove drive shaft from wheel hub and bearing assembly, using a puller or suitable tool.

CAUTION: When removing drive shaft, do not apply an excessive angle to drive shaft joint. Also be careful not to excessively extend slide joint.

Pic 6

7. Remove support bearing bolts using power tool, and pry drive shaft from transaxle.
Pry off drive shaft from transaxle.

Move joint up/down, left/right, and in axial direction. Check for any rough movement or significant looseness.

Pic 7

Check boot for cracks or other damage, and for grease leakage.
If damaged, disassemble drive shaft to verify damage, and repair or replace as necessary.

Installation is in the reverse order of removal. Note the following:
Refer to "Removal and Installation (Right Side)" for tightening torque. Install in the reverse order of removal.

CAUTION: Do not reuse non-reusable parts.

In order to prevent damage to differential side oil seal, place Tool "A" onto oil seal before inserting drive shaft as shown. Slide drive shaft into slide joint and tap with a hammer to install securely.
Tool number: KV38106800 (J-34297)
Install new circlip on drive shaft in the circular clip groove on transaxle side.

CAUTION: Make sure the new circlip on the drive shaft is securely fastened.

After its insertion, try to pull the flange out of the slide joint by hand. If it pulls out, the circlip is not properly meshed with the transaxle side gear.


Axle/differential Seal

2007 Nissan-Datsun Altima L4-2.5L (QR25DE)
Vehicle Transmission and Drivetrain Continuously Variable Transmission/Transaxle Seals and Gaskets Service and Repair Removal and Replacement Differential Side Oil Seal RE0F10A

Exploded View TM-386

pic 8

Removal and Installation


pic 9

1. Remove drive shaft assembly.
2. Remove the differential side oil seal using suitable tool

CAUTION: Do not scratch transaxle case or converter housing.


pic 10

1. Drive the new differential side oil seal into the transaxle case side (B) and converter housing side (C) until it is flush using suitable tool.
Dimension A: 0 ¬ 0.5 mm (0 ¬ 0.020 in)

Do not reuse differential side oil seals.
Apply specified NISSAN CVT fluid to side oil seals.

2. Install drive shaft assembly.
3. Check CVT fluid level.


Before reinstalling the axle, make sure to coat the rubber portion of the new seal with trans fluid.

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

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Thursday, March 11th, 2021 AT 7:30 PM

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