Hi guys I was working on my truck yesterday and noticed when I started it after I was done it was blowing white smoke and leaking from the exhaust. Then when I put it in reverse it made a loud thunk and wouldn't go. Other gears are ok. 99 4.0 4wd auto 140k miles all I did motor wise was spark plugs and new air filter. Please give me some ideas its my daily. Is it still driveable for a little while with no reverse?

 

So a little update took it to my buddy's shop and they say its the reverse band. Can I drive it for a few months like this til I get a new ranger?

 

You may just have a bad transmission modulator. exact symptoms of a bad one. Not expensive. If it is madulator change it soon because it is sucking trans fluid out. Yhat is what the white smoke is.

 

Im having the same problem, how do i check the modulator ? Where is it located?