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tranny codes

foxwar71

NAXJA Forum User
Location
Foxboro, MA
i got my new to me 99 XJ about 2 weeks ago and in the last few days the engine light has popped up and its been some tranny codes:

-No BUS message recieved
-No Transmission singal recieved
-Transmission message error

the odometer and overhead levels all still work fine and such. the light will either go off or ill clear it and itll stay off for a little. it doenst seem to turn on at a certian thing, just randomly. the fluid is full and not red but not burnt, bout right in the middle. the jeep has 85k on it, 8in lift, 35's, 4.56's, sye and shaft,etc, etc...i was thinkin the tranny might be gettin overworked so i plan on a full flush and adding an aux cooler to it. also, does it matter where i add that in (which line)?
 
i havent had a chance to climb under there and search around all the conectors but which one would u suggest might cause it?
 
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