Popping noises in 90 Jimmy

[BigOrange90Jimmy]

When I drive my truck, it occasionaly makes an odd popping noise. It's got the stock drivetrain (for now). I figure it's the 241 in it cuz it's the only thing that hasn't been rebuilt, besides the wimpy 10 bolts. It does it in reverse, forwards, and even at 65 mph's. What are your thoughts?

 

[fr8train]

Check and re-torque your u-bolts and shackle bolts. After that check out your bolts from the x-fercase to cross member.

 

[BigOrange90Jimmy]

alright i know the u-bolts are tight, but i haven't tried the crossmember bolts. what should they be torqued to?

 

[90K5]

Could be the floor. Mine does it, its got cracks where the seats bolt in.

 

[uglychevyZZ4]

good idea, also, check all bushings and especially ball joints, and bearings, jack up front and shake tires by grabbing top and bottom and see if it rocks inwards and outwards, or left to right for checking tierods. if it rocks in and out then have someone watch backside and see if it is bearings or ball joints.
Rob...

 

[BigOrange90Jimmy]

I know it's not the seats or the ball joints or bearings. It's an extremely LOUD popping noise, like metal breaking. And everything in the front & rear axle is fine. It can't be the tranny, and it can't be the engine. Someone on another post said rivets in the frame, but I have no idea how to check those.