I changed My ATF Today*Pics* (no 56k)
06-10-2010, 11:31 AM
#51
4th Gear Member
Join Date: Feb 2008
Location: Pensacola, Florida
Posts: 1,465
I was reading the Ford service manual yesterday. I wanted to know at what mileage Ford recommended changed the rear end differential fluid. Ford says, "It's a synthetic fluid that does not require changing unless the axle has been submerged in water". Umm, yeah....nice try Ford, but I would never leave the same fluid in my rear diff forever.
06-13-2010, 01:20 AM
#53
Some ATF info....
Automatic Transmission Fluid Temperature
Automatic transmission fluid (ATF) has a life of about
100,000 miles at 175 o F. At high temperatures, it oxidizes,
turns from red to brown and exhibits a burnt smell. In
addition to reducing the oil’s lubricating quality, high
temperature produces a varnish on internal parts
interfering with the operation of the transmission. Above
250oF., rubber seals harden, leading to pressure loss and
leaks. Also, the transmission can slip. In the worst cases,
clutches fail and costly repairs result.
ATF manufacturers suggest that for every 20oF. increase
in operating temperature above 175oF., the life of the fluid
is cut in half. Hence at 195oF., oil life will be about 50,000
miles. Above 240oF., it becomes nil.
Automatic Transmission Fluid Temperature
Automatic transmission fluid (ATF) has a life of about
100,000 miles at 175 o F. At high temperatures, it oxidizes,
turns from red to brown and exhibits a burnt smell. In
addition to reducing the oil’s lubricating quality, high
temperature produces a varnish on internal parts
interfering with the operation of the transmission. Above
250oF., rubber seals harden, leading to pressure loss and
leaks. Also, the transmission can slip. In the worst cases,
clutches fail and costly repairs result.
ATF manufacturers suggest that for every 20oF. increase
in operating temperature above 175oF., the life of the fluid
is cut in half. Hence at 195oF., oil life will be about 50,000
miles. Above 240oF., it becomes nil.
06-13-2010, 02:28 PM
#54
3rd Gear Member
Join Date: Dec 2006
Location: Georgia
Posts: 595
Very cool. I've never done a transmission oil change. I wonder how much different it is for a manual transmission? I wanted to change it a while ago, and now at 33k miles I wonder if that's still too early?
Side note, what's the shelf life on synthetic oil? I still have my Royal Purple Tranny fluid that I never used.
Side note, what's the shelf life on synthetic oil? I still have my Royal Purple Tranny fluid that I never used.
06-13-2010, 04:04 PM
#55
I am closing in on 94,000 how many do you have right now?
Last edited by ShadyNinja; 06-13-2010 at 04:12 PM.
08-12-2010, 10:40 AM
#58
5th Gear Member
Join Date: Jul 2007
Location: TX
Posts: 4,897
If you're talking about the front hub/bearings, they're super easy to swap. A shop quoted me $500+ to change mine so I ordered two new hub/bearing assemblies from Rock Auto @ $90 each and swapped them on myself in about 30 minutes!
Remove wheels, spindle nuts, two bolts on the calipers. Swing calipers up, slide off the old hub, on with the new after applying a bit of axle grease on the spindle shafts and torque to spec. Nothing to it. I even rented a spindle nut tool from autozone but didn't need it.
Remove wheels, spindle nuts, two bolts on the calipers. Swing calipers up, slide off the old hub, on with the new after applying a bit of axle grease on the spindle shafts and torque to spec. Nothing to it. I even rented a spindle nut tool from autozone but didn't need it.
08-12-2010, 12:54 PM
#60
5th Gear Member
Join Date: Jul 2007
Location: TX
Posts: 4,897
I was reading the Ford service manual yesterday. I wanted to know at what mileage Ford recommended changed the rear end differential fluid. Ford says, "It's a synthetic fluid that does not require changing unless the axle has been submerged in water". Umm, yeah....nice try Ford, but I would never leave the same fluid in my rear diff forever.