g56 right ? its about 700 rpm higher at 60
my 48re was 1600 rpm at 60
g56 2100 or so at 60

nv5600 decided i wanted the case iron instead

any more info guys

Yup my 06 just started to do this now.. might check into the crank sensor.. and or gauge cluster. We shall see

Hi there guys,

I do not have cummins, but I do have 1500 06 hemi and It's doing exactly same thing. I was reading on obd2 app and I saw normal 650rpm idle on obd2 and at same time 300 at tachometer :D So I suppose crack sensor is ok... I really don't know what to do... and yes, at over 1100rpm it reads ok. Oh last time cruise control stopped working until engine restart...

I have really no clue what is going on :O

I have a 2006 2500 Dodge Mega cab, 5.9 HO and the tach has been doing the same thing, readying low until I get on it down the highway. Has anyone had sucess with changing the crank sensor and fixing the tach problem?

Last time I talked to the stealership they said it was the gauge cluster its self and it the have to put it in cause the panel needs to be flashed.. and theres a core charge so they can rebuild your old one.

All of these tach problems you guys are having are very common on the 2006 trucks.

The problem is directly linked to bad solder joints on the back of the cluster itself.
They CAN be repaired if you know what to look for and how to "flow" repair an existing solder joint. Somewhere on a forum a guy posted up some great pics of his solder repairs...I'll try to find a link. Otherwise, you are looking to send the unit into a "speedometer" service repair or buy a new cluster. CHrysler must have had a VERY large, bad run of these clusters in 2006, becuase the problem is extremely common.

Ya n the messed up part is the cluster in the 06 is only for 06, and also my cargo lights quit working and the stealership said that it linked the the cluster which is retarded. So im just gonna replace the cluster and if my cargo lights still dont work then im replacing the headlight switch also. They turn on when unlock my dorrs with my auto start but dont work with the button.. kinda irritating

Tach problem
 

Replace crank sensor on mine same thing reads normal when it wants to, read post on solder my be the problem on the cluster, my banks iQ screen always shows the correct rpm so it's not the sensors, might just replace whole cluster...:humm: