75W140 Mopar synthetic

65thKJ · **Posted:** Mon Mar 26, 2007 7:59 pm

How much did people pay for Mopar synthetic 75W140 gear oil? I went to the dealershipo today and it was $26 per quart!! I bought 3 quarts to do my rear but is that the right price? I know its synthetic but wow really a rip off.

Jeep4me99 · **Posted:** Mon Mar 26, 2007 8:06 pm

I got Mobile 1 synthetic for like $10-13. There was another thread about this pricing, I think you got it in the backside and didn't even have to ask. :shock:

KJ04 · **Posted:** Mon Mar 26, 2007 8:06 pm

65thKJ wrote:

How much did people pay for Mopar synthetic 75W140 gear oil? I went to the dealershipo today and it was $26 per quart!! I bought 3 quarts to do my rear but is that the right price? I know its synthetic but wow really a rip off.

You could have gotten 75W140 Synthetic at Wal-Mart for $9.00 a qt.

adamkrz · **Posted:** Mon Mar 26, 2007 8:08 pm

The best stuff is from JJ'S at hotrodoil.com,you will also need 2 1/2 pints for the front which is also the same weight you just purchased..

Tokyojoe · **Posted:** Mon Mar 26, 2007 8:18 pm

I have a bridge in Brooklyn I'll sell ya.

Good Golly Miss Molly! Take that stuff back and go with Amsoil for nearly half that cost and support a fellow LOST addict.

Jeepjeepster · **Posted:** Mon Mar 26, 2007 8:24 pm

Good lord. I bought a 5gallon bucket of 75w-140 SYN for $85!! :twisted:

JJsTJ · **Posted:** Mon Mar 26, 2007 9:08 pm

65thKJ wrote:

How much did people pay for Mopar synthetic 75W140 gear oil? I went to the dealershipo today and it was $26 per quart!! I bought 3 quarts to do my rear but is that the right price? I know its synthetic but wow really a rip off.

I know of a shop that is changing to Amsoil Severe Gear for that exact reason. The dealer socks it to ya.

65thKJ · **Posted:** Mon Mar 26, 2007 9:31 pm

Yeah I guess I really got burned. They had already rung it up and they told me it came to $83 for 3 quarts. I was shocked but this was at Wyckoff Chrysler and the print out listed the gear oil w/ part number. I have'nt bought gear oil in a long time and I figured that since its synthetic it would be more. I think I'll just take it back and maybe get Mobil1. Tomorrow I might check a few other dealers to check if it is the standard price for the Mopar stuff.

JJsTJ · **Posted:** Mon Mar 26, 2007 10:26 pm

65thKJ wrote:

Yeah I guess I really got burned. They had already rung it up and they told me it came to $83 for 3 quarts. I was shocked but this was at Wyckoff Chrysler and the print out listed the gear oil w/ part number. I have'nt bought gear oil in a long time and I figured that since its synthetic it would be more. I think I'll just take it back and maybe get Mobil1. Tomorrow I might check a few other dealers to check if it is the standard price for the Mopar stuff.

How about 3 Qts of 75W-140 Amsoil Severe Gear to your door for a little more than the cost of the Mobil? PM me for more info and a quote. :wink:

65thKJ · **Posted:** Tue Mar 27, 2007 12:56 pm

I think I'm gonna just use the gear oil I got ripped off on. I would bring it back but I bought it at Wyckoff Chrysler, where I was picking up my skids and tow hooks. They are >50 miles away so I figure it will just cost me the difference in gas. With the frequent diff change frequency it would cost me a fortune so next time I'll use the Mobil1 or Amsoil.

Cdsbow1 · **Posted:** Tue Mar 27, 2007 11:29 pm

The lesson of the day, never buy something at the dealer that you can get elsewhere...

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

[quote="adamkrz"]The best stuff is from JJ'S at hotrodoil.com,you will also need 2 1/2 pints for the front which is also the same weight you just purchased..[/quote]

the front does not take the same as the rear

BVCRD · **Posted:** Wed Mar 28, 2007 9:03 am

jcphoto20 wrote:

adamkrz wrote:

The best stuff is from JJ'S at hotrodoil.com,you will also need 2 1/2 pints for the front which is also the same weight you just purchased..

the front does not take the same as the rear

It's fine to use the same in both.

JJsTJ · **Posted:** Wed Mar 28, 2007 9:37 am

jcphoto20 wrote:

adamkrz wrote:

The best stuff is from JJ'S at hotrodoil.com,you will also need 2 1/2 pints for the front which is also the same weight you just purchased..

the front does not take the same as the rear

The suggested weight changed a couple times over the model years. The truth is that you can use whatever weight you want in either diff as long as it meets the same MFG or API specifications. The different wieghts that are available all meet DC specs including the new 75W-110.

Maximum Carnage · **Posted:** Wed Mar 28, 2007 9:49 pm

Cdsbow1 wrote:

The lesson of the day, never buy something at the dealer that you can get elsewhere...

This is exactly what I do.

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

[quote="BVCRD"][quote="jcphoto20"][quote="adamkrz"]The best stuff is from JJ'S at hotrodoil.com,you will also need 2 1/2 pints for the front which is also the same weight you just purchased..[/quote]

the front does not take the same as the rear[/quote]

It's fine to use the same in both.[/quote]

sorry i meant you can run the thin stuff in both ends if you have a light duty or a vehicle with open diffs.

its my understanding if you have a limited slip or locker or tow you should use the thicker stuff.

sleeve84028 · **Posted:** Thu Mar 29, 2007 7:59 am

The thin stuff being 75w-90? and the thick stuff being 75w-140? I think that Chrysler recommeds such a thick fluid specification is due to the extremely small size (fluid capacity) of the front diff. The thicker fluid helps with heat dissipation and wear. But with the rear diff - I don't think the thicker stuff is truely important and that is why the specification keeps (kept?) changing. I don't really think having an LSD has much to do with it since most factory LSD's are clutch type systems that slip and don't generate as much heat. I thought I'd throw my opinion in here sice I run 75w-90 in another vehicles rear diff and it does have a LSD... I think most other vehicle differentials take the 'thinner' oil weight

The key to longevity of a differential is to check the fluid condition at every oil change and if it's bad - replace it

I wouldn't mind paying a little extra to the dealership since they are strugling to make any money these days. But, it does pay to do a little reseach on the internet to check prices even on some of the smallest things.

JJsTJ · **Posted:** Thu Mar 29, 2007 10:29 am

Quote:

The key to longevity of a differential is to check the fluid condition at every oil change and if it's bad - replace it

How do you know when it is bad? Are you having it tested?

The 02-04's call for 75W-140 in the front diff but the 05-07 call for 75W-90. I think it has more to do w/ meeting overall cafe MPG standards than anything.

65thKJ · **Posted:** Thu Mar 29, 2007 11:27 am

Actually my '06 calls for 80w90 in the front. Why not 75W90? its kind of wierd, just makes it so that we need to by different weights to stay w/ factory specs.
for the rear it says 75w90 or 75w140 if towing.

sleeve84028 · **Posted:** Thu Mar 29, 2007 1:18 pm

JJsKJ wrote:

How do you know when it is bad? Are you having it tested?

Typically if it looks dirty I replace it or if it's foamy because of water contamination I replace it. Gear oil is pretty easy to look at, or smell to determine if it needs changing. I've never had any problems with any differential by making a judgement call with my smell and vision as to its condition. I typically also consider mileage in my thought process to determine if the fluid should be changed.

I still think the front diff fluid callout was based on heat. When the Liberty first came out - the engineers spec'd a fluid that covered a broad range of weight. After some extended mileage testing and probably no customer complaints about failures, those engineers probably revised the fluid spec to the lighter weight. Sure there is an effect on MPG but because that front diff is so small the fluid has to get some serious abuse and thus the uncertainty in an exact spec.

75W140 Mopar synthetic

Who is online