I have a loud rattling underneath front end, i have a 94 jeep grand cherokee laredo the rattling doesnt start until your moving forward and gets louder the faster you go. what could it be, i was thinking loose u joint or bearing inside differential any ideas what to do first

front suspencion, ie: tie rod ball joints struts and or shocks and it could even be brakes , calipor

A bad u-joint makes a higher frequency sound /vibration than say an unbalanced tire. If you have the v-8, you have all wheel drive and the front driveshaft is always driven. Crawl underneath and wiggle both front and rear driveshafts, if one move significantly more, you've found the culprit. Go ahead and replace all the U-joints at that point.

Check the front axles

I'd start with a new flasher relay (they're cheap). If not that, then go to those lamp sockets and check for corrosion. I had issues similar w my 95 laredo...it was the flasher.

Heat Shield on Converter

Open the hood of the Cherokee. Above the headlights are one bolt to each headlight. This holds the headlight in place. Removed the bolt. Then just pull out the headlights straight forward. There are clips that hold the headlight to the inner panel.

have you change the coolant temp sensor? try that.

Check the drive shaf

got to tell me more or get it checked out with a scanner

tepfy

I have a 1994 jeep laredo. When I make a u turn there's a loud sound while making the turn and the car starts skipping until I turn the wheel straight. What causes that?