MightyXJ
NAXJA Forum User
- Location
- Central Texas
I am having a shifting issue with my 2000 XJ auto - 4.0, NP242, around 89000 miles on the clock.
Here is what it is doing -
During a lot of stop and go traffic (like rush hour), after coasting down or slowing down, when I then accelerate, the transmission will seem to slip, then drop into gear. You can see this on the tach, as the RPM will come up about 300-400 rpm and then drop back down. This is usually around 20-30 mph, and between 2nd and 3rd gear, so I don't think it's the torque converter locking up. Feels much more pronounced than that. Doesn't happen very often (less than once a day, sometimes 2 or 3 times a week.)
Here is what I have done so far -
Pulled the pan, changed the fluid & filter (fluid looked OK, only had about 20k miles on it) - there wasn't any significant buildup of clutch material (only a very slight grey film on the bottom of the pan), and only a light fuzz on the magnets. No trash in the strainer screen. I checked the soleniods, they were dead-on at 13 ohms. One odd thing was one of the crossover tubes between the valve body and the main trans body was loose, and had came partway out. I removed it, flaired the openings slightly, and pressed it back in, and it is now tight. I also checked the TV cable, and adjusted it per the factory manual (it was actually already properly adjusted, I just verified it)
The check engine light is not on either.
At this point, I am suspecting either the valve body is sticking, or a possible electronic control problem, but I am not sure, since there is no MIL lit. Any ideas would be great!
Here is what it is doing -
During a lot of stop and go traffic (like rush hour), after coasting down or slowing down, when I then accelerate, the transmission will seem to slip, then drop into gear. You can see this on the tach, as the RPM will come up about 300-400 rpm and then drop back down. This is usually around 20-30 mph, and between 2nd and 3rd gear, so I don't think it's the torque converter locking up. Feels much more pronounced than that. Doesn't happen very often (less than once a day, sometimes 2 or 3 times a week.)
Here is what I have done so far -
Pulled the pan, changed the fluid & filter (fluid looked OK, only had about 20k miles on it) - there wasn't any significant buildup of clutch material (only a very slight grey film on the bottom of the pan), and only a light fuzz on the magnets. No trash in the strainer screen. I checked the soleniods, they were dead-on at 13 ohms. One odd thing was one of the crossover tubes between the valve body and the main trans body was loose, and had came partway out. I removed it, flaired the openings slightly, and pressed it back in, and it is now tight. I also checked the TV cable, and adjusted it per the factory manual (it was actually already properly adjusted, I just verified it)
The check engine light is not on either.
At this point, I am suspecting either the valve body is sticking, or a possible electronic control problem, but I am not sure, since there is no MIL lit. Any ideas would be great!