OEM Gear Ratio Chart

My truck was e locker swapped by a previous owner and i need to know how to tell what gears are in it without opening it up.
As i wont open it up until i have a new gear set and bearings as it blew up on me when i was teaching my brother to drive stick.
Any help is appreciated in this struggle of mine. I wont scrap the truck as it has 187,xxx miles and runs good on 5 and we have a need for it still.

 

Normally I'd recommend rotating a wheel and counting the drive shaft revolutions. By 'blew up' do you mean there's no longer a mechanical connection within the differential between the drive shaft and axle shafts? I'd like to think the previous owner did his/her research and matched the front and rear ratios (assuming 4wd), but that may not be the case.

 

idk owner was retarded and did little to no matinence on it so i dont know if they are matched
the truck will not drive on the rear axle only on the front.

 

and yes i am still driving it but i took the rear drive shaft out of it

 

i use it for weekend scrap runs all over the place and load it up with so much junk that the locals call it the tweaker-mobile.

 

They were able to swap an axle but didn't perform routine maintenance? That is fascinating. Unfortunately it sounds like your only option is removing the diff cover and start counting teeth on the ring and pinion gears (the tooth counts may be stamped on the gears somewhere I've never actually checked). Number of ring teeth / number of pinion teeth = ratio. Unless someone else on here as any better ideas...

 

ok did a redneck inspection on the truck ( Testing movement of suspension components with a crowbar ) and the front axle shafts are also loose with a 1/2 inch of slop in them too. yay.....l

 

is there a way to extract the metal catalyst from the manifolds to sell for scrap money as i am taking out the downstream one as it was plugged and i wonder if the manifold ones are plugged too.

edit sorry this made no sense, i dont want to take them off or replace them with headers. i was wondering if i could get the platinum out with them still in the truck.
i am trying to get some money saved up to buy some wheels to replace the split rims on my tow truck

 

Am I looking at B03A?

 

yep