I am getting a used 2007 Jeep Wrangler Unlimited X next week and was wondering if anybody could please give me some insight on how to identify what type of transfer case and diffs I may have. Also, I spoke to Royal Purple and they said that using any other fluids besides what Jeep sells would void my warranty. I have never heard of this but I could see car manufacturer doing this to boost their maintenance sales. I do not know what this jeep has been through so I am going to change all fluids; both diffs, oil, transfer, tranny, etc. Any information will be appreciated.
"Also, I spoke to Royal Purple and they said that using any other fluids besides what Jeep sells would void my warranty.
Royal Purple is blowing smoke, that's simply not true. What the warranty says is that you need to follow the instructions in your Owners Manual to keep the warranty effective. Notice where it reads "or equivalent".
Copied from the Owners Manual:
FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine Coolant: Mopart Antifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Organic Additive Technology)
Engine Oil: Use API Certified SAE 5W-20 Engine Oil, meeting the requirements of DaimlerChrysler Material Standard MS-6395. Refer to your engine oil filler cap for correct SAE grade.
Spark Plugs: (3.8L Engine) RE14PLP5 (Gap 0.050”)
Oil Filter: (3.8L Engine) Mopart Oil Filter (P/N 04105409AC)
Fuel Selection: 87 Octane
Automatic Transmission: Mopart ATF+4 Automatic Transmission Fluid
Manual Transmission: Mopart Manual Transmission Lubricant or equivalent (meeting the requirements of DaimlerChrysler Material Standard MS-9224)
Transfer Case: Mopart ATF+4 Automatic Transmission Fluid or equivalent.
Axle Differential (Front) Mopart Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential: (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - Mopart Gear & Axle Lubricant: (SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use Mopart Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models equipped with Trac-Lok require an additive.
Brake Master Cylinder: Mopart DOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE J1703 brake fluid is not available, then DOT 4 is acceptable. Use only recommended brake fluids.
Power Steering Reservoir: Mopart ATF+4 Automatic Transmission Fluid
Copied from the Warranty booklet:
9.1 General Information
It’s your responsibility to properly maintain and
operate your new vehicle. Follow the instructions
contained in the General and Scheduled Maintenance
Service guidelines in your Owner’s Manual. Regular,
scheduled maintenance is essential to trouble-free
operation. If there is a dispute between you and
Chrysler Motors LLC ("Chrysler") concerning your
maintenance of your vehicle, Chrysler will require
you to provide proof that your vehicle was properly
2008 Wrangler Unlimited Sahara 4dr 'JK' -- Steel Blue Metallic -- Hard Top
It should have the Command-Trac NV241 t-case and a D30 front axle and D44 rear axle.
Post pics when you get it!
Not necessarily a Dana 44 in the rear. Although most people got them, many JK's still got a Dana 35 until it was sort of phased away. Hopefully he got a 44, but there's no way to tell without actually seeing it or the build sheet.
I have a 07 Wrangler X and wanted the same info. So I go the vin# and called the Jeep customer service number in the manual. They gave me all of the info needed, just give them a call. Mine was built in March 07 and it came w/ a dana 44 on the rear and a 30 next gen on front. 410 gears as well.
Life is better Topless: Drive a JEEP!