In the past month Ive been going through the high mileage Major service list. And I have done a lot of work to the LR.

I have done a search on servicing the transmission. I have found Spike's write up. And I have read other posts dealing with the issue.

I have already ordered/received the tranny service kit (Filter and gasket) and I am on my way to buy 8 qts of the valvoline dex/merc ATF.

This is the first time Ive done any maintenance on the tranny... any tranny.

According to the service records (at least the ones that I still have since I became more organized) the tranny hasnt been serviced in 170k. I doubt its been that long, but according to the service records that I have. The tranny has no issues. The truck runs great and shifts smoothly. My last tank of gas I had 17mpg.

My question is.
My Disco has 200K on the clock. I have read that once the truck has over 100K on it. Transmission flushes are not recommended. And the transmission in general is more sensitive.

Should I go through with the filter replacement or should I only change out the fluid? Or should I take it in to the stealership and let them deal with it? (which is not what I want to do with it)

 

change the fliud and filter ASAP. Power flushing a high milage transmission is not recomended. Power flushing is completely different than change the fluid and filter.

 

While you ar at it, change the fluid 2 or 3 times and than after second or third drain replace your filter and gasket. use penetrating spray on all the pan screws, before openning them. On my D1 I broke one of them and it was pain to get the broken screw out and tap it. D2 has much easier access to the pan, you don't need to remove cross membrane or exhaust.

ATF is relatively cheap, you will probably need less than 5 quarts each time, when changing the fluid before the last change, you don't need to fill it up after starting and going through the gears.

What I did was drain, fill, start the car and go through the gears, than turn off the car, drain again and fill and start go through the gears and turn off and drain and after changing filter and gasket fill it run through the gears, keep the car running go under it and open the fill plug and put more ATF until it start pouring out. Be care full about the exhaust, it will be hot.

 

Sounds good. Im going to do exactly that once the truck cools down a bit. Thanks for the replies.

 

One reason fro the multiple changes is that the drain does not get out the quantity in the torque converter, which circulates again when transmission is moved through the gears.

 

yeah, I did the initial drain & fill. Ran it through the gears and filled it again.

The tranny fluid that came out was as dark as motor oil... I took it around the block and its running a lot better.

Im going to run it around til tomorrow and repeat the process. Thanks for the helps guys!

 

I ll add that there is a clunk or hard shift when I go from Park to Reverse... hope that clears up after the whole process is completed (Gasket and Filter).

 

Also, while I was under there. I noticed that the transfer case was leaking pretty bad. So I looked up the transfer case on the rave manual and did not notice any gasket being used for the transfer case... is this correct? Do I use red RTV sealent to make a gasket or does it not need one?

edit
once Im finished with the transmission I am going to focus on the Transfer case.

 

Get gunk gel degreaser, go under the truck and spray it every where you see oil, than go and power wash it, I had to do this process twice and than some additional cleaning without washing to find the exact location of the leak, most common place is the cover plate, but mine was not leaking there, so before you start to take it apart find out where it is leaking from and how much. Some people have great success with whitesheppered, I used it but my transfer case still has a leak, when I bought the car, I thought it was leaking alot, but now I see that it is very slight.

 

do not power wash your engine, I did and had misfire and O2 sensor codes for few days after