Transmission issues with 1992 Jeep Cherokee XJ

[James Hatch]

Hi there,

 

I have a 1992 Jeep Cherokee XJ that has had the engine swapped for what I think is a 1995 Cherokee Engine that is the 6 cylinder variant. I have the automatic transmission. I think it is the 3 speed but I am not quite sure. When I got it, it would start but quickly sputter out unless I floored it. I then discovered it had a leaky line from the transmission to the radiator. I then quickly fixed this line with hose clamps and such. I dumped around 1.5 gallons of transmission fluid in and it was able to run and stay running, although in a very rough state. I got it drivable and noticed that past 1500 RPM, the transmission would slip. I added another gallon and now the transmission can get up to around 3000 RPM before slipping. I also notice that when I start the car, it idles very rough for around 5 seconds while in park and then smooths out. When I shift into reverse or forward drive, it idles rough again. Sometimes when I filled the transmission too quickly the overflow valve would let a little fluid out. I let the car sit and then I could keep pouring. I should also note that the transmission was filled while the vehicle was off and then I would run it for a while. At this point it still slips and while the vehicle runs, I don't know if adding more fluid is the solution as I think there is around 3.5 gallons of transmission fluid in the system right now. The more I add the less it seems to slip, but should I keep adding more? Is there a different solution?

[James Hatch]

I also forgot to mention that the shifter that selects 4 wheel and 2 drive options (transfer case shifter) doesn't do anything. It doesn't click into any of the different modes and the dashboard shows that it is running in 4x4 part time no matter what position I put the transfer case shifter. I'm not sure that this is related to the issue.