Hey, guys! I think it's about time I stop being so cheap and change out my transfer case and diff fluids. I changed them last at 137k miles, I'm now at 186k miles. It's been almost 50k miles, should I change it now or wait? Last time I used Redline 75W-90.
Now, two questions:
1. Is it time to change out the fluids? I think it is, but I know a lot of people who go longer.
2. What fluid should I use?
It's spec'd for:
Quote:
Hypoid gear oil API GL–5
Above –18_C (0_F) SAE 90
Below –18_C (0_F) SAE 80W or 80W–90
I was thinking about using Royal Purple 75W-90, but it's $20 a bottle (I'll need two, one for the diff and one for the transfer case) and I'm wondering if it's worth that much, compared to the Mobil 1 which is only $11 per bottle. I don't mind paying the extra if it's worth it, but if they are both practically the same, then why bother paying more? lol
Thanks!
Now, two questions:
1. Is it time to change out the fluids? I think it is, but I know a lot of people who go longer.
2. What fluid should I use?
It's spec'd for:
Quote:
Hypoid gear oil API GL–5
Above –18_C (0_F) SAE 90
Below –18_C (0_F) SAE 80W or 80W–90
I was thinking about using Royal Purple 75W-90, but it's $20 a bottle (I'll need two, one for the diff and one for the transfer case) and I'm wondering if it's worth that much, compared to the Mobil 1 which is only $11 per bottle. I don't mind paying the extra if it's worth it, but if they are both practically the same, then why bother paying more? lol
Thanks!