questions about belts, pulleys, and rear traction

[vandior2001]

I could use some advise on few problems bugging me lately.

first i just replaced the A/C idler and smooth idler pulleys, using autozone parts.

the pulleys all look the same size (A/C one was plastic ) but the belt is WAY loose. 102.5 inch belt

what's the normal size for a MJ belt ( 4.0 87 ) using a 100 inch 6 rib now, but  it's a bit small

 question #2

i have a problem spinning tires. i know i am under geared ( 285/65R18 stock 3.07 gears) but i need some weight in the back.

i have my original front axle in the bed now ( needs lower control arm brackets) but i need my bed to haul stuff!!

would adding a heavy rear bumper work? i got a place i can get big pieces of 1 in steel plate @ $0.35 a pound.

would building a 200 or so pound bumper work?

Thanks for any help

 

van

[Jeep Driver]

My rear bumper weighs about 100-125................makes a huge difference. 

 

Got any pics of your wheel/tires?

[vandior2001]

no i need to setup a photobucket and get a better camera but i will try to get it done this weekend

[Eagle]

A heavy rear bumper can help, but it also has a downside -- it's several feet behind the rear wheels. If you start to skid, all that weight is going to make it harder to pull out of the skid. You really want any additional weight right over the rear axle.

[DirtyComanche]

39 minutes ago, Eagle said:

A heavy rear bumper can help, but it also has a downside -- it's several feet behind the rear wheels. If you start to skid, all that weight is going to make it harder to pull out of the skid. You really want any additional weight right over the rear axle.

 

Yup, or even in front of it and low.  The location of the factory gas tank is genius for that, too bad the exhaust has to live on the other side so you couldn't run a second tank there.