about my Tranny please help.

[mdwyer]

If your mode selector was bad your gear selector indicator on the dash will not be lit.

Not true, in my experience. You might see no indicator or random indicators for about 5 seconds, but after that the computer takes over and forces it into D. It sort of neglects to light a trouble indicator, though.

For me, the real symptom was the tooth-rattling shifts...

[CoastieCosta567]

whats the "tooth-rattling shifts"?

[Anita]

The shifts are hard, even pretty violent jerks when the tranny is shifting up and /or down. People have had sporadic episodes where is does it some of the time. Do a search on mode switch. When mine was going out, my truck started bucking HARD shifting up and down, after starting it up in the morning. I limped it to the mechanic right then and there. I noticed that the gear indicator lights on the dash would flicker (sometimes showing the wrong gear) as I put her into Drive or park.

[CoastieCosta567]

yeah it does that. so that really could be the mode switch? how much does it cost and how easy of a fix is it?

The shifts are hard, even pretty violent jerks when the tranny is shifting up and /or down. People have had sporadic episodes where is does it some of the time. Do a search on mode switch. When mine was going out, my truck started bucking HARD shifting up and down, after starting it up in the morning. I limped it to the mechanic right then and there. I noticed that the gear indicator lights on the dash would flicker (sometimes showing the wrong gear) as I put her into Drive or park.

[Ldub]

Do a search on mode switch.

[CoastieCosta567]