Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Inspection

(a) Use the removed transmission oil cleaner magnets to collect any steel chips. Examine the chips and particles in the transaxle housing and on the transmission oil cleaner magnets to determine what type of wear might be found in the automatic transaxle assembly.

Result:

Steel (magnetic)

Bearing, gear and plate wear

Brass (non-magnetic)

Bushing wear

(a) Using a dial indicator, measure the input shaft end play.

Input Shaft End Play:

0.255 to 1.103 mm (0.0100 to 0.0434 in.)

(a) Check if the contact surfaces of the forward multiple disc clutch discs, forward multiple disc clutch plates and forward clutch flange are worn or burnt.

If necessary, replace them.

(a) Check if the contact surfaces of the No. 2 clutch discs, No. 2 clutch plates and direct clutch flange are worn or burnt.

If necessary, replace them.

(a) Check if the contact surfaces of the 1st and reverse brake clutch discs, 1st and reverse brake clutch plates and 1st and reverse brake flanges are worn or burnt.

If necessary, replace them.

(a) Using a caliper gauge, measure the inside diameter of the bushings of the rear planetary sun gear sub-assembly.

Standard Inside Diameter:

24.287 to 24.313 mm (0.956 to 0.957 in.)

Maximum Inside Diameter:

24.313 mm (0.957 in.)

If the inside diameter is greater than the maximum, replace the rear planetary sun gear sub-assembly.

(a) Using a feeler gauge, measure the clearance between the front planetary gear assembly and each pinion gear.

Standard Clearance:

0.2 to 0.6 mm (0.00787 to 0.0236 in.)

If the clearance is not as specified, replace the front planetary gear assembly.

(b) Using a feeler gauge, measure the clearance between the front planetary gear assembly and each pinion gear.

Standard Clearance:

0.2 to 0.6 mm (0.00787 to 0.0236 in.)

If the clearance is not as specified, replace the front planetary gear assembly.

(a) Using a caliper gauge, measure the inside diameter of the bushings of the planetary sun gear sub-assembly.

Standard Inside Diameter:

33.286 to 33.312 mm (1.31047 to 1.31149 in.)

Maximum Inside Diameter:

33.312 mm (1.31149 in.)

If the inside diameter is greater than the maximum, replace the rear planetary gear assembly.

(b) Using a feeler gauge, measure the clearance between the rear planetary gear assembly and each pinion gear.

Standard Clearance:

0.19 to 0.77 mm (0.00748 to 0.0303 in.)

If the clearance is not as specified, replace the rear planetary gear assembly.

(c) Using a feeler gauge, measure the clearance between the rear planetary gear assembly and each pinion gear.

Standard Clearance:

0.19 to 0.77 mm (0.00748 to 0.0303 in.)

If the clearance is not as specified, replace the rear planetary gear assembly.

(a) Temporarily install the one-way clutch assembly to the rear planetary gear assembly.

*1

B-1 Brake Piston Rod

-

-

*a

B-1 Brake Piston Rod Length

-

-

None

102.8 (4.05)

a

103.05 (4.06)

a, b

103.3 (4.07)

a, b, c

103.55 (4.08)

a, b, c, d

103.8 (4.09)

a, b, c, d, e

104.05 (4.10)

a, b, c, d, e, f

104.3 (4.11)

a, b, c, d, e, f, g

104.55 (4.12)

a, b, c, d, e, f, g, h

104.8 (4.13)

a, b, c, d, e, f, g, h, j

105.05 (4.14)

a, b, c, d, e, f, g, h, j, k

105.3 (4.15)

(a) Using a vernier caliper, measure the free length of the clutch return with retainer spring sub-assembly including the spring seats.

Standard Free Length:

14.62 mm (0.576 in.)

If the free length is shorter than the standard free length, replace the clutch return with retainer spring sub-assembly.

(a) Using a vernier caliper, measure the free length of the 1st and reverse brake return spring sub-assembly including the spring seat.

Standard Free Length:

19.01 mm (0.748 in.)

If the free length is shorter than the standard free length, replace the 1st and reverse brake return spring sub-assembly.

(a) Using a vernier caliper, measure the free length of the under drive return with retainer spring sub-assembly including the spring seats.

Standard Free Length:

17.26 mm (0.680 in.)

If the free length is shorter than the standard free length, replace the under drive return with retainer spring sub-assembly.

(a) Using a vernier caliper, measure the free length of the forward clutch return spring sub-assembly including the spring seat.

Standard Free Length:

15.38 mm (0.606 in.)

If the free length is shorter than the standard free length, replace the forward clutch return spring sub-assembly.

(a) Using a dial indicator, measure the clearance of the C-1 clutch while applying compressed air (approximately 200 kPa (2.0 kgf/cm2, 29 psi)).

Piston Stroke:

1.0 to 1.2 mm (0.0394 to 0.0472 in.)

HINT:

Measure the clearance at 3 points where the forward clutch piston diameter is approximately 140 mm (5.51 in.) and calculate the average.

If the clearance is not as specified, select an appropriate forward clutch flange so that the clearance will be within the specified range.

Forward Clutch Flange Thickness:

(a) Using a dial indicator, measure the clearance of the No. 2 brake while applying compressed air (approximately 200 kPa (2.0 kgf/cm2, 29 psi)).

Pack Clearance:

0.5 to 0.7 mm (0.0197 to 0.0276 in.)

HINT:

Measure the clearance at 3 points where the 1st and reverse brake piston diameter is approximately 140 mm (5.51 in.) and calculate the average.

If the clearance is not as specified, select an appropriate 1st and reverse brake flange so that the clearance will be within the specified range.

HINT:

There are 8 1st and reverse brake flanges of different thicknesses available.

1st and Reverse Brake Flange Thickness:

35675-48010

2.5 (0.0984)

35675-48020

2.6 (0.102)

35675-48030

2.7 (0.106)

35675-48040

2.8 (0.110)

35675-48090

2.85 (0.112)

35675-48050

2.9 (0.114)

35675-48100

2.95 (0.116)

35675-48060

3.0 (0.118)

35675-48110

3.05 (0.120)

35675-48070

3.1 (0.122)

35675-48080

3.2 (0.126)