Also, if it has the original shifter, there is a small plastic piece that connects the bottom of the T-case shifter and the two separate rods that operate the T-case. That plastic piece on mine broke a few years ago and wouldn't allow it to shift correctly. Thats why I decided to twin stick it. Could also explain why you are not feeling the correct hi low ranges compared to your shift pattern. Your shifter may be only connected to one rod.