4-25-22

Hi all...so good to be back on this great forum. You are all so helpful. I have a 2017 Tacoma TRD Off Road 4x4 Access cab. I am getting to the point of changing Front and Rear Differential oil as well as Transfer Case oil.

My Tacoma has Automatic Limited-Slip Differential as well as Locking Rear Differential. Here is where it gets a little confusing for me:

1. My parts manager at my dealership told me that I have non-synthetic gear oil in the Front Differential and that is the oil that was placed in the Front Differential at the factory. I purchased

Valvoline non-synthetic High performance 75W-90 gear oil that contains limited slip additive andAPI Service GL-5. When needed, is it OK to place this oil in the Front differential?

2. Do I place this same oil in the Rear Differential when needed? Or since it is a Locking Rear Differential, do I just place non-synthetic oil, minus the Limited Slip additive, in the Rear

Differential? And what should the Oil Type and Viscosity be for the recommended Rear Differential oil?

3. Does anyone know what type of oil and viscosity was placed in the Rear Differential at the factory?

4. What type oil and viscosity should be placed in the Transfer Case when needed? Same as what I am

placing in the Front Differential? Rear Differential?

5. Can anyone shed some light as to what mileage should the oil in the Front and Rear Differential as

well as the Transfer Case be replaced?

I cannot find specific answers to the above questions. I sure would appreciate your knowledge and comments to the above questions.

Thank you in advance.