Cartcowboy55

My 94 grand cherokee jerks alot Wen im driving and take a few to get up to speed also wen i shift from park to reverse it jerks hard and make a loud "pink" sound. Iv also got a shakeling sound in my back end. Anybody know wat could be wrong

ol"blue

Welcome to CF. Check the universal joints in the rear drive shaft for wear/play, and have someone pull the plug or rear cover off of the rear axle to check the fluid, and for any damage to the gears/bearings. That could explain any noise/binding conditions that could cause the issues your experiencing. JMO

Cartcowboy55

I checked my u-joints and thier ok. But i have checked the fluid in my axel. Im a do it urself kind of guy so is thier any way i could check it myself or do i have to have a special tool

Cartcowboy55

Havent checked*

ol"blue

You probably have the Dana 35 rear axle and D30 front axle. This will show a pic of the differential covers for them. each one has a plug, either a metalone that unscrews, or a rubber one that can be popped out to check the fluid level which should be at the bottom of the hole once the inspection plug is removed. You can insert you finger and see if you can feel any fluid and then check the condition of it if so. Or you can remove the circle of bolts holding the cover on after placing a container underneath to catch the fluid that will drain out. This way you can check the condition of the pinion bearings and differential gears and bearings. Then replace the cover and install new fluid if all appears okay. JMO

Cartcowboy55

Ok ill do that today. Wat kind of fluid will i need if i drain it?

Cartcowboy55

And how do i put more fluid in?

Bustedback

Pump it in where that plug is.

Cartcowboy55

Ok i know im a hundred questions,cuz iv never had a dad,to teach me ****,so im trying to learn on my own but is there a tool that pumps it in or is there a can of the fliud u can buy that has a tube on it to pump it in kind of like a fix a flat can?

customzj73

Really? Pull the plug, cut the tip off the 90wt and pour it in.

customzj73

BTW your jerking problem won't be solved by adding fluid.

Cartcowboy55

Its not the fluid im counting on. Im checking the gears and bearings in my drive shaft

customzj73

You don't have gears in your driveshaft.
No offense but if you didn't know how to put fluid in the axle nor did you know how to get the rubber cap off, then how do you plan on being able to tell if the pinion, carrier, or axle bearings are bad?

Cartcowboy55

Well its comnon sense if u see something striped or out of place. Im just trying to learn, that i joined this app and ol blue is helping alot cuz hes describing it and showing pic so eventually ill learn

ol"blue

Checking differential.