ok got a chance to pull the cover off today it sure is the ring and pinion gears no other damage to the spider or anything else, now I need to know what size to get to replace it, baught the cover gasket at auto zone and of the two sizes I baught the lagrer 11, but top and bottom dont match up but the sides do. so anyone know from this what Ring and Pinion gear set I need. Thank BTW...

Ok I got to work on the rear today it is the Ring and Pinion gears, No further damage, Spider looks fines, Baught a cover gasket at autozone they had two sizes and the one I baught was too small 10 bolt cover, so now I need to know what Ring and Pinion set I need to get and the gasket size. I am on disability and cant afford laot so this I have to do myself as I cannot afford the 600 to 800 to have a shop to do it all the info would be of a great help, thank you.

 

You have the 7.625" rear axle. If you are on a budget, I would recommend purchasing a used rear axle from a local junkyard and installing that. It is much cheaper and easier than trying to setup new gears. Especially if you have never done it before and do not have the specialized tooling necessary to properly set the lash & patterns. You can use a rear axle out of pretty much any 98+ 4wd s-series vehicles provided they are 7.625" rear axles for a direct swap.

As far as ratio goes, take a look at the glove box for your RPO codes or count the teeth on the ring & pinion. The gear ratio will be the # of ring gear teeth divided by the # of pinion gear teeth.

 

My engine is 4.3 litter and its a four door electronic 4x4, 7.5 rear 10 bolt I believe standard size, but at what ratio I am clueless 41 tooth 40 tooth by 12 teeth on the pinion, it has stand 15 inch tires. disc breaks all the way around,

 

41/12 is 3.42 which is one of the available gear ratios for your year. 40/12 is 3.33 which is not an available stock gear ratio. If you have 3.42 gears, you should also have GU6 on the RPO code list.

 

here is the code 1GNDT13W8YK190345

 

easier and cheaper just to find a junkyard rearend,thats what i did check your RPO code list to see what rearend you have,3.08 is GU4,3.42 is GU6,3.73 is GT4.your RPO list is in the glove box!

 

or you talking about that 6 or 7 rows of numbers and letter...
like AJ1 AU0 AU3 AU5 AXP A31 type

 

yes thats what we are talking about!

 

it's GU6

 

Well I run into yet another problem, The Left rear wheel parking break is making it impossible to pull drum off, it a combo Disc/parking break style. the rotor just will not pull off and I'm affraid of wacking it as that may damage it. Any thoughts of getting it off. Thank you!