CV axle fluid 2007 jeep patriot

Welcome! Do you have the manual for it? I'm not sure, but I think it uses the transmission fluid as its one unit. Not sure though.

 

I found this:

1. If fluid level is low or fluid change is required fill with MOPAR® MS9020 SAE 80W90 Gear Lube until to bottom of fill plug.
2. Tighten fill plug (1) to 32 N·m (24 ft.lbs.).
3. Tighten drain plug (2) to 32 N·m (24 ft.lbs.).



The PTU unit is located on the transaxle. It's bolted in between the passenger front half shaft and the transaxle. Just follow the driveshaft from the RDU to the front.

 

Page 370 Maintaining Your Vehicle
Rear Drive Assembly (RDA) Make sure your Jeep is parked on a level surface then crawl under. Pull the fill plug. The fluid should be level with the bottom of the hole( no lower than 1/8 below ). If it is low add some until it is at the correct level.

To add fluid you squirt some in from a bottle of gear lube using the spout/tip that comes on the bottle. If you can't get the bottle in there to do it get some hose( about 12" long usually does it )that fits over the tip and use the hose inserted in the fiill hole to add fluid.

I don't see anything in the online manual about how to change it. However, there will either be a drain plug near the bottom of the housing you just pull and let it drain or you will have to pull a cover like a traditional rear axle differential has. My guess on this vehicle is a drain plug but I haven't crawled under to look?

You have a 4WD so don't forget the fluid in the transfer case(

Genuine Ford Fluid XY-75W90-PTU Specialty Power Transfer Unit Fluid - 500 ml

Power Transfer Unit )also needs to be checked for proper level and serviced as well.

Page 371 Maintaining Your Vehicle
Power Transfer Unit (PTU)

Same proceedure. Park it level, crawl under, and check using the fill hole. Should be level or no lower than 1/8" below. Fill as needed. There should be a drain plug for servicing.

For what to use...

Page 389 Maintaining Your Vehicle
Fluids & Capacities/Chasis Components

Both the RDA and PTU take 80W90 GL5 rated gear oil. The manual specifies non synthetic. I honestly do not know if that is because all that is needed is regular conventional gear oil OR if there is an issue with synthetics being too slippery? Sometimes you can see units( limited slip, AWD PTU's/RDA's, etc... )that have problems with synthetics because they don't alllow enough friction to work properly. I honestly do not know if synthetic gear oil can be used or not. I plan on writing to Jeep to see before I need to service the RDA and PTU. I prefer to use synthetics where ever possible.

Note - the owner's manual does not state how much fluid is needed for a service of the PTU or RDA. I looked it up online on an aftermarket site. I don't know how accurate it is but it says...

RDA = 1.3 Pints
PTU = 1.1 Pints

As to when you should service( i.e. change the fluids )the RDA and PTU. It is the same for both standard service( Schedule A )and severe service( Schedule B )..

Page 389 & 406 Maintenance Schedule
Schedule A & B

RDA = 60,000 miles
PTU = 60,000 miles

 

This picture might help:

 

There is a cover you might have to remove:

 

To expose the underside of the "PTU"

 

Use a 17mm socket to remove the fill plug:

 

From what I have found, the Drain plug is a 24mm: