Was told not to change gear oil?

[MarshallGirvin]

I've been looking at an 01 F350 SC and I brought to a buddies last night to have it looked at. He told me that if the gear oil (front and back) hasn't been changed than I shouldn't change it. He says that as the gears wear and metal comes off, they take up the missing space in the gears. If I change the oil and remove these pieces the gears will slap and I will blow my diffs up. He says hes seen it time and time again.

I've never heard of that. I'm curious as to what everyone else thinks. Should I not change my gear oil?

[Mikey's250]

I changed mine at 125k miles, I know Ford says you dont need to change it unless there is a leak/repair etc but I just couldnt make my self leave it in there, no oil can last forever. I would change it, I know they say not to flush a trans if it hasnt not been done for a lot of miles but I dont think the same applies for a diff.

[2006PSDSD]

That's as foolish a statement I have heard in a while . Change the fluid if you're at the interval, or are doubting

[matty21]

theres a reason you've never heard of it. !!

while your at it don't change your engine oil because the little metal filings will be flushed out and cause your cams and pistons and oil pump to "clap" then ruin your engine.

what a tard. so if you forget to do proper maintenance the idea here is to just leave it longer
haha. he's a snake oil salesman who has no sales until you have to replace the entire unit, being engine tray diffs, etc.

[Fantom]

Originally Posted by matty21

theres a reason you've never heard of it. !!

while your at it don't change your engine oil because the little metal filings will be flushed out and cause your cams and pistons and oil pump to "clap" then ruin your engine.

what a tard. so if you forget to do proper maintenance the idea here is to just leave it longer
haha. he's a snake oil salesman who has no sales until you have to replace the entire unit, being engine tray diffs, etc.

Man, that is gonna save me so much money

[MarshallGirvin]

Alright thanks guys.

[ToMang07]

Yeah.... tell your friend to stop smoking pot while working on cars.


In fact... just don't listen to ANYTHING he says....just to be safe!

[HaysKSFirefighter]

Originally Posted by MarshallGirvin

I've been looking at an 01 F350 SC and I brought to a buddies last night to have it looked at. He told me that if the gear oil (front and back) hasn't been changed than I shouldn't change it. He says that as the gears wear and metal comes off, they take up the missing space in the gears. If I change the oil and remove these pieces the gears will slap and I will blow my diffs up. He says hes seen it time and time again.

I've never heard of that. I'm curious as to what everyone else thinks. Should I not change my gear oil?

Tell your buddy he's a dumb@ss and shouldn't be giving people advice...an individual with less smarts might believe him and not ask for a second opinion from folks like us who know better.

[lcducote]

the gears really don't wear down that much to be honest.. and the plug doubles as a magnet that keeps the filings out of the gears.. your friend is completely and totally wrong bro. haha

[skooter]

bet he told ya your truck would run better on gasoline too huh? lmao