GEAR OIL: What do you use? 90 or 140 grade

**roydok** · October 9th, 2003 01:10 PM

Originally posted by jackaroo

Roydok,
Most diffs require a GL5 oil, does your rig specify GL4 only for either diff? What GL rating did you use on the transmission?

You were right sir. I did replaced the SAE 140, API GL-4 gear oil I originally placed in my two differentials and replaced it with Castrol SAE 90, GL-5 sa casa. Thanks.

**roydok** · October 9th, 2003 01:12 PM

Sir Ungas,

I recall sir that the Petron SAE 90 gear oil from most of it's stations are API GL-4. Though I know they do sell API GL-5 oils based from their website I'm not sure if it's available in most stations.

**jackaroo** · October 9th, 2003 06:11 PM

Ungas,
If Petron's Sae90 is a GL4 gear oil then ok lang but i'd check to confirm.
Have you tried isolating the noise in the diffs? Raise the front, transfer on neutral, lock the frt hubs and try spinning the wheels thru the front prop shaft. Then try it on the rear diff by turning rear prop shaft(hand brake off). If noise does not appear then it may be transfer or transmission.

Roydok,
Glad that helped and think Sae90 is better for the strada's diffs. What about the tranny, does it need a GL4 or5?

**roydok** · October 9th, 2003 09:26 PM

Originally posted by jackaroo

Roydok,
Glad that helped and think Sae90 is better for the strada's diffs. What about the tranny, does it need a GL4 or5?

Sir jackaroo,

Sir the Strada tranny requires SAE 90 and API GL-4. I did not replace it with GL-5 sa casa since it's already GL-4. Thanks again sir.

**Ungas** · October 9th, 2003 09:49 PM

I never really tried to isolate the sound. I will as soon as I visit chieffy's station.

**sixpack** · October 10th, 2003 01:01 AM

I think it will be harder to shift on oil 140 compared to 90

**jkyamog** · July 21st, 2004 04:23 PM

I also used 140 GL-5 sa rear diff of my Feroza. Kasi I can't find a 90 GL-5. It was either mas malapot (140 GL-5) or less lubricating properties (90 GL-4). I put Shell Spirax Axle oil, GL-5. I had to DIY since Shell does not want to put it themselves

Most gas stations only have GL-4 rating grear only, sabi sa akin dati mayroon daw sila pero konti lang nagpaservice na trucks. Good only for cars and trannys. Once I find a 90 GL-5 I will replace it again.

**wiretap_md** · July 21st, 2004 05:40 PM

jkyamog: I changed my rear differential oil a few days ago to Mobil 1 Synthetic Gear oil 75w90. So far so good. P700/quart sa True Value Rockwell.

**jackaroo** · July 21st, 2004 06:56 PM

There's Mobilube HD90, GL5 at P95/L if bought by box of 6x4L. You'll have to pool a group of friends to finish 24L!

**CZintrclr** · July 21st, 2004 08:32 PM

Magtatanong na rin po regarding gear/trans oil. Ilan liters kaya aabutin para sa pajero? And saan mas ok mag pa change ng trans. and gear oil? Shell, caltex or petron?