Originally Posted by
mantis
from what you are saying im suspecting the brake band servo piston is out of torque,it wouldn't hurt if you check it out yourself, its in the valve body, you are gonna need a an oil pan gasket(ratherly the ones from an isuzu parts) for the main case of transmission, its easy to work under the truck since you have a good space from the ground, disconnect the battery ground, support the transfer case with a jack dont lift it much, just lay its weight on the jack, there are 2 screws holding the transmission to the third cross member and 4 screws on each side of third cross member, the third cross member is right under the transmission, you're gonna have to unclip some wires and harnesses in order to get the third cross member of the truck,once you get the third cross member off drain the transmission fluid by unplugging the drain plug which is the on on the bottom of the pan,drop the main case oil pan which is the bigger oil pan of transmission and , drop the oil filter 3 screws(13mm), you should be able to see the servo piston cover that is almost 4 inch by 4 inch bowl thing with 4 screws(13 mm) attaching to the valve body, get the cover off and the servo piston is in there, there is rod coming out of the servo piston that has a locknut and the very end of the rod looks like bolt head, loosen the lock nut and using a trque wrench(you can buy that for like 25$ from auto parts), tight the rod to
4.5 nm then back off 5 turns exactly, then tight the lock nut to 18.5 nm holding the rod with another wrench so the rod wouldn't go out of torque, if the gasket of servo piston is warned out or it broke replace it with a new one make sure you clean the surfaces, tight the 4 screws of servo cover (13mm) to 25 nm, install the oil filter tight the three screws(13mm) to 20 nmtruly clean the oil pan contact surface with transmission and the transmission where it contacts the oil pan with, make sure there is nothing on those areas, clean up all the screws, put the oil pan back and torque all the screws to 11 nm(16 screws 10mm), put the third cross member back on and make sure the transmission holder 2 bolts pass through their holes in centre of the third cross member tight the screws to 50 nm, put the wires and harnesses back on, you can buy a manual pump in autozone for like 8$, follow the procedure of oil change that ldup posted, save yourself at least 3000$, they estimated me for that much when i had the same problem, give it a shot and good luck
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