Hello to all,I have been trying to find the fill plug on my 2002 dodge durango,can any 1 lead me in the right direction??I clearly see the drain plug but where is the fill plug,also can someone recommend me what fluids to use?Thanks

 

Hi and welcome to the forum, loads of great advice on here to be had, but folks need a little more info on what you have, there are a few variations of 2002 Durango, give a little more info if you can, model, engine etc, not being nasty to you, but people need to know this before they can give you advice.
For a start, on mine there is no drain plug on the diff, I wish there was.

 

Sorry,I have the 2002 with the 4.7 motor 4X4

 

Cool, its Saturday night and not all peeps are as sad as me being on here, so hopefully someone may chime in and tell you what diff you have, or tell you how to find out what diff you have, but meanwhile, use the search function on this forum with some keywords and see what is already posted here, good luck. People will help.

 

There is no drain plug on the differential, only a fill plug. To drain a differential, you just loose a couple bolts on the cover and let the fluid run through the opening. Once most of it empties, you can remove the cover to get the rest out. Make sure you clean the edges really well and use RTV to seal it back up.

Do you know if you have a limited slip differential? An easy way to check is to jack up the rear wheels, spin one by hand and watch to see if the other wheel spins the same direction. If it does, you have limited slip. This is important to know because LSDs require a friction modifier to be added to the differential fluid (it only takes 4oz of friction modifier and it's about $5). The differential fluid is 75W-90. I personally use Mobile-1 LS 75W-90

 

yup samnbensdad nailed it, just unbolt the cover to drain, fill through the rubber plug, make sure to use the friciton modifier if you have LSD.

check for LSD:

jack up rear of car so both rear wheels are off the ground, spin one side and see which direction the other side spins

wheels spin in opposite directions : open differential
wheels spin in same direction (may not spin if the truck is in park) : LSD

 

[quote=samnbensdad;2524937]There is no drain plug on the differential, only a fill plug.

Well I knew that too, but I wuz being gentle.

 

Also, to ID what set of gears you have there will be a tag on one of the outside bolts you will remove...it will say 3.5 (3.55 ratio) or 3.9 (3.92 ratio)