Fluid Changes

[judge09]

I bought my 99 Grand Cherokee Limited a few months back. It has 26k miles on it. When do you all think the tranny and differential fluid need to be changed? Is drain and fill ok or do they need to be flushed. Thanks for the insight.[addsig]

[keriandyb]

I change my tranny, transfer case and differential fluids every 30K. Also do the tranny filter if applicable. Gear oil additive is a must if you stress parts off-road.[addsig]

[dingus]

especially during the break-in period (which i consider to be the first 30-40k miles) changing oil reguarly is most important because the sharp edges of the metal wear down the most during that time.[addsig]