My EB I6 has done 183,000 (original trans) with a shift kit I installed at about 170,000 which has been a good mod as it definately stops clutch slippage and improves economy.....I am just wondering if anyone knows how long the solenoid units last on the BTR and is there an interval that they should be changed ie 200,000.....I spose i could just keep the fluid fresh and start worrying when things actually start playing up???

dont worry about it to much until it starts playing up
i work on transmissions and you might end up opening a can of worms