Deciding on what ATF and Transfer Case - Rear Diff fluid to get.
 

I've read so many posts and threads, regarding the procedures in changing the Transmission Fluid, Along with the Transfer Case and Rear Differential, and have spend hours upon days researching what fluids to get before I get started on changing them But, I've been second guessing on what to put in my car. The options I've been mauling over are,
Castrol Import Multi-Vehicle ATF
Red Line D4 ATF
FUCHS TITAN ATF 4400
I was wondering if anybody has had great success with any of these ATF fluids or opinions and suggestions from their experience.

and as for the TC and Rear Differential fluid
I was thinking of
Ford Motorcraft 75w-140
Red Line

Any and All Thoughts, Comments and Suggestions would be greatly appreciated

Have this in the transfer case and rear diff

TITAN SINTOPOID LS SAE 75W-140 - Fuchs.

The gearbox was flushed so no information for that

I have done a ton of research about these items over the past 3 weeks as i have a new xtype i am going over with a fine tooth comb and doing ALL fluids.

for the diff and transfer case i decided on royal purple 75-140. my reading led me to believe these two are not quite as fluid sensitive and any synthetic 75-140 should work fine.

For the Transmission, I finally settled in on the castrol multi import. It Has the same s spec as required in the jag published technical guide and is the least expensive of the bunch. picked it up at wallmart. after reding more content and back and forth on the subject matter i am confident in my decision. With that said , I have 10 bottles sitting in the garage ready to do 3x renew, so no mileage experience here

I use Royal Purple 75-140 in the transfer case and rear diff. Valvoline MaxLife Mercon multi import vehicle in the transmission. Now I pull out 3.5qts on every oil change and replace it with 3.25qts oil and .25qts (1/4 can) of Trans Tune.

Some, or most, would advise against the trans tune, typically I would as well since I'm not really an additive kind of guy but, when I first got the car it had a really hard downshift into 4th when cruising on the highway and putting your foot into it to pass.

My first drain and fill I ran a whole can through it for about 100 miles. Then, for the next few quick drain and fill procedures I didn't use the trans tune so it could get diluted down in the fluid. The dramatic downshift to fourth was gone instantly, which is why I continue to use a .25qts with every drain and fill. My transmission shifts and operates quite smoothly and the fluid is always a nice red color now.

I have always used Mobil 1 75W-140 full synthetic fluid in my vehicles. Granted, I have heard lots of good things about the Redline line of fluids. the big thing you need to keep in mind is that for the rear diff and transfer case you need full synthetic fluid. Going with anything less is asking for future troubles.

i have used Ravenol jf506e it gives the jag ref no. on the bottle so should be good made in Germany i got mine on ebay

I went with RedLine 75w-140 for the TC/Rear Diff.
and Castrol Import Multi-Vehicle ATF.
I plan to get started on the fluid change this weekend.
along with replacing the front O2 Sensors and Fuel Filter.

I did the transfer case drain / fill today, Jacked up the right side 21 inches, used a small 3/8 extension on the ratchet for the drain plug, what came out was about 375-400ml of what looked like maple syrup, real thick and dark brown. metal sludge on the magnetic plug. cleaned it. jacked up the left side 21 inches, pumped in RedLine 75W-140 till it started to run out, plugged it up and that was that. the hardest part of the whole thing was jacking the car up.