Toyota Tacoma 2015-2018 Service Manual: Transfer System
Precaution
PRECAUTION
- Before disassembly, clean the transfer assembly and remove any deposited sand and mud to prevent it from entering the transfer during disassembly and assembly.
- When removing any light alloy parts such as the transfer covers, do not pry them off with a tool like a screwdriver, but tap them out with a plastic hammer.
- Always organize the removed parts properly and protect them from dust.
- After cleaning and drying the transfer completely before installation, apply hypoid gear oil to each part. Do not use alkaline chemicals when cleansing aluminum or rubber parts or ring gear set bolts. Also, do not use any cleansing oil (ex. non-residue solvent) to clean rubber parts such as oil seals.
- Apply sufficient hypoid gear oil to all sliding surfaces and rotating parts.
- Do not directly hold any parts in a vise. Be sure to put an aluminum sheet between them.
- Replace any damaged or deformed snap rings with new ones.
- If the mating surface of the case is scratched, it could cause oil leakage. Therefore, handle with care to prevent such damage.
- Using a razor blade and gasket scraper, remove old seal packing from the seal surface.
- Clean all the components to remove the redundant seal packing completely.
- Clean the sealing surface with solvent so that no residue remains on the seal surface.
- Apply a line of seal packing approximately 1.2 mm (0.0472 in.) diameter of bead state along the sealing surface.
- Be sure to assemble parts within 10 minutes of application. Otherwise, the seal packing must be removed and reapplied.
- Do not pour in oil immediately after installing sealed parts. Leave it for at least an hour.
- Scratches on the contact surface with an oil seal or gasket could cause oil leakage. Handle with care to prevent such damage.
- When press-fitting an oil seal, take care to prevent the oil seal lip and its periphery from being damaged.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Noise |
1. Oil (Level low) |
|
|
2. Oil (Wrong) |
|
|
|
3. Transfer faulty |
|
|
|
Oil leakage |
1. Oil (Level too high) |
|
|
2. Gasket (Damaged) |
|
|
|
3. Oil seal (Worn or damaged) |
|
|
|
4. O-ring (Worn or damaged) |
|
|
|
Tight corner braking |
1. Transfer faulty |
|
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Transfer Oil
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK TRANSFER OIL
(a) Remove the filler plug and gasket.
Text in Illustration
*1
Fill ...
Other materials:
Transfer L4 Position Switch Circuit (C1268)
DESCRIPTION
A-TRAC is activated if wheel skid is detected while the transfer is in the L4
position.
DTC Code
DTC Detecting Condition
Trouble Areas
C1268
L4 detection switch signal input to skid control ECU (master cylinder
solenoid ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the audio and visual system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Transmission Control Switch Circuit
DESCRIPTION
After moving the shift lever to S, it is possible to switch the shift range between
"1" (S1 range) and "6" (S6 range) using the transmission control switch.
Moving the shift lever to "+" once raises the shift range by one, and moving
the shift lever to ...