I am concerned about the Amsoil Severe Gear 80W-90 in my 1992 Previa N/A RWD's differential. I had the bearings redone in it about 10 months ago. At the time I filled it with Amsoil Severe Gear 75W-110 and the groaning was more metallic in sound, as in it sounded more like metal to metal contact. Not exactly contact per se, but rather it sounded like a ringing that comes from metallic clatter. Either way, I switched over to Amsoil SVG 80W-90, which reduced the noise, but it did not completely deaden the noise.
Now after 6 plus months of driving with Amsoil SVG 80W-90, I'm tempted to either go back to conventional gear oil or possibly go with half SVG 80W-90 and half SVG 75W-140.
I am planning on draining the differential's SVG 80W-90 and getting a UOA done on it. Then refill with basic conventional 80W-90 until the results come in. If the results show good wear numbers I'll go with half and half of SVG 80w-90 and SVG 75W-140.
The reason why I want to continue to use the Synthetic Gear Oil is because my differential has such a low capacity at 1.6 quarts. When driving on the freeway at 80+ mph the differential gets up to 235 degrees F in ambient temperatures of 90+ degrees F. (IR Thermometer shooting rear of differential) I drive those speeds in hot weather 5 days out of the week where I live. I could change out my differential fluid more often, but I'd prefer to do it once a year at most. I drive approximately 20,000 to 25,000 miles a year.
What are your recommendations? I have seen UOAs of Amsoil SVG and have heard testimonials on BITOG and want to have the ultimate protection for my daily beater vehicle.
Now after 6 plus months of driving with Amsoil SVG 80W-90, I'm tempted to either go back to conventional gear oil or possibly go with half SVG 80W-90 and half SVG 75W-140.
I am planning on draining the differential's SVG 80W-90 and getting a UOA done on it. Then refill with basic conventional 80W-90 until the results come in. If the results show good wear numbers I'll go with half and half of SVG 80w-90 and SVG 75W-140.
The reason why I want to continue to use the Synthetic Gear Oil is because my differential has such a low capacity at 1.6 quarts. When driving on the freeway at 80+ mph the differential gets up to 235 degrees F in ambient temperatures of 90+ degrees F. (IR Thermometer shooting rear of differential) I drive those speeds in hot weather 5 days out of the week where I live. I could change out my differential fluid more often, but I'd prefer to do it once a year at most. I drive approximately 20,000 to 25,000 miles a year.
What are your recommendations? I have seen UOAs of Amsoil SVG and have heard testimonials on BITOG and want to have the ultimate protection for my daily beater vehicle.