From the top roughly align the dipstick tube so the bracket is parallel with the back of the engine. According to this diagram, there might be 3 bolts left instead of 2. Remove the 8mm bolt holding the wire bracket on this side top of the transmission. The question should be, first of all, whether cleaning it would do any good, and if so, whether it needs to be cleaned. Move the cable above the brake lines or some other place to hold it out of the way. The problem I was having was I was losing transmission fluid but nothing was leaking. There are several bolts which slide through the transmission's bell housing into the back of the engine.
Cleaning them is a very tedious process and probably will not do you much good. May need to cut it though. However, even the Silverado is not immune from the eventual wear and tear of its drive train components. Remove the 2 driver's side connectors at the transmission shifter. If 0ne is a 4x4 and the other is not then neither trans. Disconnect the transfer case linkage I just pried it out with a flat blade screwdriver. The crankshaft pulley must be periodically turned with a deep socket wrench to access all four bolts.
Given enough miles, the engine and transmission will need to be rebuilt, although it is rarely necessary to rebuilt both components at the same time. Although the engine and transmission can be removed from the Silverado simultaneously, only the transmission must be removed for an overhaul. The only thing that you can really clean with any success is the outer cover. Of course disconnect the heater hoses under the hood a thefirewall. Get the spline and input shaft to insert into the torque converter and pilot bearing.
There should be at least 2 ½ feet clearance from the bottom of the transmission to the ground. Re-install the transmission pan when you are done. Install the distributor clamp bolt. Is there a special tool that I need to have in order to reach them? Answer going up in tire size will rob you of power. Remove the exhaust pipes I was able to get the trans out with having taken the nuts just off the driver's side manifold and leaving the torque converter cover hanging on the cross pipe but it was a near thing.
Be careful to ensure the trans is straight and the guide pins are seating, the bell housing is just aluminum and any binding could risk damaging the transmission case. Since o2 sensors are disigned to hande such extreme temeratures. Remove the 2 10mm bolts holding the catalytic converter heat shield to the transmission. Turn this nut with a wrench, then pull the cable out of the transmission. With my right hand on the extension and my left hand down behind the engine and on the bracket I pushed down on the extension until the tube was seated and the bracket was roughly in place. No more ruining your expensive paper shop manual with grease and dirt. But this is the problem.
Try to get the threads to start if you can. Once its in 4L you can put the tranny back into drive and your good to go. But I would have to say, good luck, since O2 sensors very seldom fail do to being dirty. Your life is made easier if you remove the drive shaft 4x4 which unless you are magic you must remove the exaust pipe. Make alignment marks on the transfer case yoke, the rear of the front drive shaft, the front of the front drive shaft and the front differential yoke. Slide the plastic collars back and use a 90 bent pick to unclip the cooler lines from the transmission.
The speedometer cable attaches to the transmission with a single nut located at the end of the cable. Remove the 6 15mm bolts holding the torque converter cover. Once down to the last few bolts loosen them, lift the pan back into place, and remove the remaining bolts. Once all is out you can remove the fluid filter, make sure you remove the O'ring as well. Then remove the 20 or so bolts holding the pan up. Install the distributor cap onto the distributor. The shift linkage attaches to the transmission with a single bolt and nut.
I purchased the… Transmission repairs can be simple or very complicated. With key in off position turn key to acc position, radio must be turned off. Mine took longer 3 days as I didn't have these instructions to start, had to backtrack some steps, the service manual steps are vague. Tip the back of the transmission down to allow access to the top bellhousing bolts. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.