'07 Dodge 3500 6.7 diesel

[LwnmwnMan2]

Today my 3500 started sounding a bit strange.

When you come to a stop, it wants to act like it'd still in gear trying to move. It also sounds like the aux. Fan is engaged, even though the temp gauge is normal.

When the truck is put in park, the the sound goes away and the truck idles normal.

Also the exhaust is very hot and doesn't have the usual smell.

All gauges are normal range.

Any thoughts?

[LwnmwnMan2]

Vacuum.booster?

I just realized when I step on the brake pedal it's a bit squishy and hisses.

[jeffreyd]

or a leak in the lines.

[Macgyver55]

Possible vacuum pump?

[Valv]

Actually your brakes are hydroboost, they are run by the power steering pump, your vacuum pump (very, very expensive) runs only the servos for climate control and some other small features including I believe the jake brake.

If transmission sticks in gear I would have it checked by a shop, just in case.

Some cases of bad ground were notorious for erratic shifting and other issues with PCM

[LwnmwnMan2]

This morning it was acting the same way, but by this afternoon, it's no longer doing it.

I have no idea if a module was sticking, or what, but it's going in the shop on Monday to get a second U-joint put in. They put one in a week ago, but apparently they should have replaced the other one as well.

[LwnmwnMan2]

BTW, thanks for your help so far guys