I have a rear gear problem-please help

acmillr · July 9th, 2006, 08:20 PM

OK here's the deal- I have a 2003 GT and it is a daily driver. When I drive it to and from work ( about 8 miles), I don't have any problems. However, if I drive it a while ( 50+ miles or so) it begins to sound like the rear gears are binding when I turn at slow speeds. Has anyone had this problem or know what the problem might be??

Twist 2 Go · July 9th, 2006, 09:35 PM

rear diff clutches are grabbing. Replacing the gear oil and additive might help but Ford also has some new carbon-fiber diff clutches out to address this concern as well. If you're still under warranty, should be covered w/ no problem.

97Cobra · July 9th, 2006, 09:36 PM

did you check the rear suspenshion?axel bearings etc etc. did you ever get new gears put in 3.73, 4.10s?????

acmillr · July 9th, 2006, 09:41 PM

I'm not under warranty anymore. I haven't opened up the rearend at all. It still has stock 3.26 gears with 39000 miles on them. How much money am I looking at to fix this problem if I have to go into the rearend? Also, is this a common problem with this model??

Twist 2 Go · July 9th, 2006, 09:43 PM

yes, it's fairly common although we replace them in the trucks and expeditions more frequently. the clutch kit is around $125 or so and installation takes about 1-2 hrs depending on your skill level.

97Cobra · July 9th, 2006, 09:47 PM

Twist 2 Go and his infinant fouintain of knowledge

acmillr · July 9th, 2006, 10:12 PM

What do I need to do to properly assess the situation, and where do I need to get the parts from? ( Ford dealer? )

Twist 2 Go · July 10th, 2006, 02:08 PM

parts are available at any Ford dealer. Here is a list of what is needed.
F5AZ-4947-BA 8.8" Axle Clutch Kit
XY-75W140-QL Rear Axle Lubricant need3
XL-3 Additive Friction Modifier need 2
F3TZ-4121-AA Metal Tag - 75W140

acmillr · July 12th, 2006, 08:44 AM

Thanks alot for your help.

July 9th, 2006, 08:20 PM	#1
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	I have a rear gear problem-please help OK here's the deal- I have a 2003 GT and it is a daily driver. When I drive it to and from work ( about 8 miles), I don't have any problems. However, if I drive it a while ( 50+ miles or so) it begins to sound like the rear gears are binding when I turn at slow speeds. Has anyone had this problem or know what the problem might be??

July 9th, 2006, 09:35 PM	#2
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	rear diff clutches are grabbing. Replacing the gear oil and additive might help but Ford also has some new carbon-fiber diff clutches out to address this concern as well. If you're still under warranty, should be covered w/ no problem. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

July 9th, 2006, 09:36 PM	#3
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Colorado Springs Posts: 6,521 iTrader: 1 reviews	did you check the rear suspenshion?axel bearings etc etc. did you ever get new gears put in 3.73, 4.10s????? __________________ Modifications and pics in my Garage... Reps Appreciated!

July 9th, 2006, 09:41 PM	#4
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	I'm not under warranty anymore. I haven't opened up the rearend at all. It still has stock 3.26 gears with 39000 miles on them. How much money am I looking at to fix this problem if I have to go into the rearend? Also, is this a common problem with this model?? __________________

July 9th, 2006, 09:43 PM	#5
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	yes, it's fairly common although we replace them in the trucks and expeditions more frequently. the clutch kit is around $125 or so and installation takes about 1-2 hrs depending on your skill level. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

July 9th, 2006, 09:47 PM	#6
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Colorado Springs Posts: 6,521 iTrader: 1 reviews	Twist 2 Go and his infinant fouintain of knowledge __________________ Modifications and pics in my Garage... Reps Appreciated!

July 9th, 2006, 10:12 PM	#7
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	What do I need to do to properly assess the situation, and where do I need to get the parts from? ( Ford dealer? )

July 10th, 2006, 02:08 PM	#8
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	parts are available at any Ford dealer. Here is a list of what is needed. F5AZ-4947-BA 8.8" Axle Clutch Kit XY-75W140-QL Rear Axle Lubricant need3 XL-3 Additive Friction Modifier need 2 F3TZ-4121-AA Metal Tag - 75W140 __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

July 12th, 2006, 08:44 AM	#9
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,111 iTrader: 2 reviews	Thanks alot for your help.

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