Selection of transfer case adjusting shim (4WD) (Nissan Qashqai J10)

Ring gear adjusting shim (side of the transition case)

1. Measure all required dimensions as follows:

Size " A"

Using a circulating gauge and a straight edge, measure the distance from the contact surface of the transition housing with the transfer case housing to the outer surface of the transition housing (see the figure "Measurement parameters" above).



Size "B"



Using a measuring instrument and a straight edge, measure the distance from the mounting surface of the ring gear adjusting shim on the adapter housing to the outer surface of the adapter housing (see the figure "Measuring parameters" above).



Size "C"

Using a caliper, measure the diameter of the bearing mounting area of the pinion shaft (back side) in the transfer case housing (see the figure "Measuring parameters" above).

Caution: Be careful not to damage the transfer case housing.

Size "D"

Using a caliper and a straight edge, measure the distance from the contact surface of the transfer case housing with the transition housing to the mounting surface of the VAP-gear bearings (back side) (See the figure "Measurement parameters" above).

Attention.

• Be careful not to damage the transfer case housing.
• Take into account the thickness of the straightedge.

Size "E"

Using a feeler gauge, measure the distance from the outer surface of the ring gear shaft bearing ring (side of the transition case) to the outer surface of the inner ring (see figure "Measuring parameters" above).



2. Calculate the sizes "M" and "N" using the following formula:

• M = A - B
• N = C x 0.5 + D

3. Transform the reserves E, M and N according to the following norms:

• E: Actual value relative to the range from 0 to 20.00 mm in 0.01 mm increments.
• M: actual value relative to the range from 0 to 13.90 mi with a step of 0.01 mm.
• N: Actual value relative to the range from 0 to 55.00 mm in 0.01 mm increments.

4. Check the size of "Z" (machining tolerance) on the back surface of the ring gear.

Note: The "Z" dimension indicates the difference between the optimum engagement and the standard dimension in 0.01 mm increments, which is indicated on the back side of the ring gear.

5. Calculate the thickness of the ring gear adjusting shim (side of the transition case) T1 according to the following formula:

• T1= (M + N - E - Z) x 0.01 + 1.40 mm

6. Select the ring gear adjusting shim (side of the transition case).

Attention.

• Use only one adjusting shim.
• If there is no adjustment shim of the desired thickness, it is necessary to select a shim whose thickness is closest to the calculated value, and it is preferable to select a shim slightly thicker than the required value than a thinner one.

Ring gear adjusting shim (transfer case side)

1. Measure all required dimensions as follows:

Size "C"

Using a caliper, measure the diameter of the bearing mounting area of the pinion shaft (back side) in the transfer case housing (see the figure "Measuring parameters" above).

Caution: Be careful not to damage the transfer case housing.

Size "D"

Using a caliper and a straightedge, measure the distance from the contact surface of the transfer case housing with the transition housing to the mounting surface of the gear shaft bearings (back side) (See the figure "Measurement parameters" above).

Attention.

• Be careful not to damage the transfer case housing.
• Take into account the thickness of the straightedge.

Size "F"

Using a depth gauge, measure the distance from the contact surface of the transfer case housing with the transition cap to the installation surface of the ring gear adjusting lining (see the figure "Measuring parameters" above).

Caution: Be careful not to damage the transfer case housing.

Size "G"

Using a straight edge micrometer, measure the distance from the mounting surface of the ring gear shaft bearing to the side edge surface of the transfer case housing (see the "Measuring Parameters" figure above).

Attention: Take into account the thickness of the ruler.

Size "H"

Using a caliper, measure the distance from the outer surface on the side of the transfer case housing to the side surface on the side of the transition housing (see the figure "Measuring parameters" above).



Size "I"

Using a caliper pump, measure the distance from the mounting surface of the ring gear on the ring gear shaft to the mounting surface of the ring gear shaft bearing (transfer case side) (See the figure "Measurement parameters" above).



Size "J"



Using a caliper, measure the distance from the outer surface of the ring gear shaft bearing (transfer case side) to the inner ring outer surface (see the "Measuring Parameters" figure above).



2. Calculate the size N using the following formula:

• N = C x 0.5 + D

3. Transform the dimensions F, G, H, I, J and N according to the following standards:

• F: Actual value relative to the range from 0 to 122.60 mm in 0.01 mm increments.
• G: Actual value relative to the range from 0 to 26.60 mm in 0.01 mm increments.
• H: Actual value relative to the range from 0 to 48.60 mm in 0.01 mm increments.
• I: Actual value relative to the range from 0 to 119.40 mm in 0.01 mm increments.
• J: Actual value relative to the range from 0 to 16.25 mm in 0.01 mm increments.
• N: Actual value relative to the range from 0 to 55.00 mm in 0.01 mm increments.

4. Check the size of "Z" (machining tolerance) on the back surface of the ring gear.

The "Z" dimension indicates the difference between the optimum engagement and the standard dimension in 0.01 mm increments, which is indicated by a corresponding inscription on the back of the ring gear.





5. Calculate the thickness of the ring gear adjusting shim (side of the transition case) T1 according to the following formula:

• T2 = (F - G + H - I - J - N + Z) x 0.01 + 1.65 mm

6. Select the ring gear adjusting shim (side of the transition case).

Attention.

• Use only one adjusting shim.
• If there is no adjustment shim of the desired thickness, it is necessary to select a shim whose thickness is closest to the calculated value, and it is preferable to select a shim slightly thicker than the required value than a thinner one.

Adjusting shim for pinion shaft

1. Check the U dimensions (machining tolerance) between the old and new drive gears when replacing a pair of hypoid gears (shaft pinion and ring gear). Assemble new pinion shaft adjusting shims of the same thickness as those removed during disassembly, or remove the pinion shaft adjusting shims when reusing a pair of hypoid gears.

Note: The "U" dimension indicates the difference between the optimum engagement and the standard dimension in 0.01 mm increments, which is indicated by a corresponding inscription on the end face of the gear shaft.

2. Calculate the thickness of the adjusting shim of the T gear shaft using the following formula.

T = T0 + [(t1 -12) x 0.01],

• where T: thickness of the new gasket.
• T0: thickness of the old gasket.
• t1: the "U" dimension marked on the end of the old pinion gear.
• t2: dimension "U" marked on the end face of the new pinion gear.

Note.

Example:

T= 3.21 + [(2+1) x 0.01]

• T0: 3.21
• t1: +2
• t2: -1

3. Select the gear shaft adjusting shim.

Attention.

• Use only one adjusting shim.
• If the adjusting shim of the calculated thickness is not available, use the one closest in size.