My dealer says that the diff fluid must be changed at 12k on my 07 XL7.i looked in my owners manual under maint and it does not say anything about this.i now have 16k on it.
thoughts???
My dealer says that the diff fluid must be changed at 12k on my 07 XL7.i looked in my owners manual under maint and it does not say anything about this.i now have 16k on it.
thoughts???
If the fluid is gross then the dealer might recommend it before the maintainence book. I don't see enough XL7s to know - I've only changed diff oil in one before lol! On the SX-4 the rear diff oil is pretty gross by 10k due to break in period. After you change it once it'll be fine for a long time afterwards.
I don't know if synthetic is mandatory for the rear diff - but the transfer drive up front requires synthetic - although it is apparently lifetime fluid I've drained and filled it before.
I tried to do some research on the rear differential and apparently its a Getrag 660 and uses Hypoid fluid (extreme pressure or EP)because it has hypoidal gears.
I think you would be well-advised to do this maintenance even if it is not in the schedule. Even though I'll bet Getrag did a better design job, the older model GV has a very weak drain plug magnet that looses effectiveness with just a light load of ferrous particles. Since you don't need the dealer stamp, do it yourself and save the money. Use that GL-5 75W-90 synthetic.
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Differential Fluid Change ?????
Linear Mode
