Transmission
SOURCE: Transmission wont shift into reverse
By the grayish color, fluid being thick, and metal shavings, the clutches are pretty much worn out. It's time to either rebuilding your transmission or just installing a good used one. The fluid normally should be a reddish color. The gray is from the actual clutch material going away.
SOURCE: Jeep erradic in shifting
I would look into replacing the VSS which is the vehicle speed sensor, it is the input that tells the transmission when to go into overdrive and the torque converter to lock up, also make sure the connector is clean and tight to the sensor, this part is located on the side of the trans where the speedo cable would go.
SOURCE: 94 Jeep Wrangler intermittently stalls when put in reverse, drive
Take the air inlet hose off where it enters the throttle body and take a look at the throttle plates. It is likely that they’re dirty and have a build-up of carbon deposits. That is the most common cause for stalling that we see in the shop for your vehicle. Sometimes all it takes is a good cleaning to cure the stalling problem. There is an idle speed setting on your Jeep, but to check and/or perform this service step requires the use of a computer scan tool for your vehicle. If the cleaning doesn’t help ask a repair facility to check and reset, if needed, the minimum idle speed on your Jeep.
Thnx.
SOURCE: 2004 Jeep Wrangler - Clunking Noise when shifting out of Park
It could be lash in the differential which is normal, but it could also be a loose u-joint in the driveshaft. Check the rear driveshaft u-joints.
SOURCE: Automatic transmission band adjustment
Don't have specs on band but the rule is that it should be close enough to the drum to engage without slamming, and loose enough to permit drum to turn without band dragging on it. Biggest problem I've seen people have when adjusting is that adjustment tightens down while turning lock nut. To avoid this, I usually adjust a bit looser than final adjustment so it tightens to correct position instead of becoming too tight. Don't drive 'till you have it right or you will burn band surface. When engaged in reverse, band should be applied and cannot drag. If you adjusted another band, check that one for improper adjustment.
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