changing transmission oil at high mileage

bullet · Postby **bullet** » Mon Jun 18, 2012 4:46 am

hey, i noticed that my transmission oil was getting a bit darker and i am thinking of changing it but i need to know will it damage the transmission because it have 167k miles on it right now. (its AT transmission,2003 infiniti qx4)

thanks

Postby **smj999smj** » Tue Jun 19, 2012 6:23 am

New fluid will never damage a transmission so long as it's the correct type. If a transmission fails after a fluid replacement and assuming it was done correctly, it would have failed in due time, anyway. Nissan calls for genuine Nissan Type "D" ATF in your trans, which is essentially original Dexron. Dexron and Dexron II have a thinner viscosity than Dexron III. While Dexron III is perfectly fine for topping off the trans fluid level, it should not be used for a fluid service as it has been known to cause sticking in the valve body. If you want an aftermarket alternative to Nissan Type "D," Valvoline Maxlife ATF and Castol Multi-import ATF are both acceptable.

bullet · Postby **bullet** » Tue Jun 19, 2012 10:22 am

thanks for the advice and do you know how many liters of oil it needs if i do it normal draining with a filter change

Postby **smj999smj** » Tue Jun 19, 2012 9:11 pm

There is no filter to service; Nissan, like many Asian makes, uses a screen that is, for the most part, just left alone. To service, just remove the drain plug and drain and refill. Typical refill is about 4-1/2 quarts US. Start with 4 liters and top off as needed once running and warmed up.

changing transmission oil at high mileage

changing transmission oil at high mileage

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