Transmission NEED HELP

Ok I have a 1993 Lincoln Continental the transmission has not worked right since I have had it the car shifts from 1st to 2nd to 3rd but it will not go into 4th gear so the car only goes about 105-110kms then it starts to rev up I dont know what his could be the frist gears swich great it is just 4th gear that dont work.
Do you think that it is the transmission itself I have change all the fluids and filter vut it still does the same thing I have even tryed adding Lucass to the transmission but with no luck
Please help

....then it starts to rev up...4th gear that dont work...

Sounds like the OD band is gone. You'll be looking at a rebuild, or if you have the know-how you can replace the band yourself.

Is the OD band hard to replace?

Is the OD band hard to replace?

Have a look around the www to get some more ideas of what's involved in a transmission teardown, what to look for, what's mandatory in every teardown, etc....


Here's a good place to get you started..... (http://www.mn12performance.com/mn12-techinfo/trans-tech/4r70w_rebuild.html)
Give it some time to load, it's a huge page...

Thanks Towncar Im also going to try lincoln Online
Thanks for all your help