Community Forums

89fltioga · 03-13-2014, 10:52 AM

thanks for all the input, ill go with synthetic 75w140, i think i can get away with spending less than $50.00 for it as i can get an amsoil dealer to get it for me at a discount .

EngineerMike · 03-13-2014, 11:13 AM

30 years ago I rebuilt an outdrive due to a leaky seal, & used 80w90 or something close cuz I had it on hand. Manual called for 90wt hypoid gear oil. Within 10 hours of use the hypoid gears overheated & broke. $850, 3 weeks for parts & my labor later (not to mention the tow of the lake) and I learned my lesson. If there is a special oil spec (like "hypoid gear") them make sure I follow it to the letter.
The new hypoid gear oil had a different feel than the standard 90wt, and a different smell. And it lasted till I sold the boat years later.

89fltioga · 03-13-2014, 11:23 AM

i just came across a youtube video the other night where a man took a car into a shop for an oil change and the tech put in gear oil and the car only got less than a mile down the road and the shop would not do anything at all for the guy.

TeJay · 03-13-2014, 01:27 PM

That's one of those deals where you have to do something. Get a sample of the oil they used from the bad engine. Send it in and have it analyzed. Go to court with proof that the gear oil does not work in an engine. They will have to pay but they won't do it unless they are forced to do so. Maybe just showing up to collect some oil from the ruined engine would be enough. Also contact a gear oil company and have them present technical reasons why gear oil is not good for an internal combustion engine. Two reports presented to the dealer should do the trick.

I think that approach should be several thousand reasons why the company that messed up should take care of the problem.

TeJay

jamesrxx951 · 03-13-2014, 05:17 PM

Quote:

Originally Posted by Red-Rover

If you have a limited slip differential, you will also need to add a friction modifier to the oil?
My 2002 requires this but don't know about a 1996. Check the owners manual.

Not all limited slip rear differentials Ford uses (not sure about other manufactures) require friction modifier. For instance, the Dana rear ends typically do not use friction modifier. Some year DANA 80's use the modifier and some years do not. Friction modifier is very year and axle specific for limited slip differentials.