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[tim_aka_tim]

Since I don't know when it was last done, I'm thinking it might be a good idea to change the tranny oil on my XJ (4.0 1995).

I've not got my Haynes to hand, so can anybody advise me on whether the transmission has a filter, and if it does where it is and how to replace it.

Also, does this tranny need ATF4+ or Dexron II?

Cheers guys.

[ponyracer1]

If it hasn't been serviced regularly then I wouldn't change the oil. Pull the pan and save the tranny fluid, change the filter, install the pan and refill with old fluid (unless it is brown or smells burnt)

The reason behind it is when you take a high mileage tranny that has never had it's fluid changed the fluid has a fine grit in it that the filter can't get rid of(from the clutches wearing). The bands/clutches are worn in the tranny, the "grit" is whats allowing them not to slip. If you change the fluid to fresh stuff it will lube the internals then you will get slipage and need a rebuild.

I didn't believe it either until I saw it first hand, uncles garage, customer insisted on a full flush and new oil, he was warned, 3 weeks later he was back with the tranny slipping.

Why do you think tranny shops try to sell you a full flush and clean fluid??

Also if you only change the oil in the pan there's about 5 more quarts in the torque converter.

[tim_aka_tim]

Interesting reading, thanks.

I've got dealer stamps up to 100,000 miles, but thats when the book runs out. It's now done 140,000 miles. The fluid itself looks red like it should and doesn't smell burnt.

Sounds like the best plan is to have someone who knows what they're doing take a look at the fliud at CF. It's not long now!

[Mike Pavelin]

The fluid should be changed at least every 30 000 miles. There is a filter inside the oil pan which is changed at the same time.
Drain the oil pan, remove it, replace the filter, refit the pan (seal with RTV silicone) and refill with DexronII (you'll need about 4 litres)
AW4 transmission brake bands are self adjusting so there are no adjustments to make during service.
A simple but oily job, try to do it in a garage to keep dust from getting in while the pan is off.

[tim_aka_tim]

Cheers Mike. Seeing that I've dealer stamps upto 100,000 miles, at worst it's 20,000 past it's due date, so probably worth changing.