Rear diff on a 05 Sport Trac XLT

DoItBig · 10-24-2008, 01:18 AM

I've been wanting to suprise my pop with a locking rear diff since his truck at work (2006 Dodge Dakota 4x4) has one.

I've been doing a lot of research and needing 4WD for much of the things he does is overrated, he does off roading, just not anything that you'd need full blown 4WD. I have found out that he does need a locking rear diff. Personal experience. I tried driving up a good sized hill, dropped it into 2nd for more torque before the climb, and she started climbing. Halfway there she stalls (stopped moving, not turned off) and the rear right wheel starts spinning. (i knew this because a. you heard the obligatory whine of lost traction b. dirt was begining to fling from that side) Just great. So i back down and try again from a different angle, and she does the same. Well having that happening to me was enough to worry about my dad. Hes an agressive pedaler and will give the engine just a bit too much gas on a grade, he also hates it when i drop the truck into second for more torque. He claims "you'll wear out the transmission faster" So as a general catchall I want to lower his rear end ratio and put an auburn ected on it.

To do this, being a big noob at exploders technical specifications, I need to know how/or what differential is on the rear end of my Sport trac. And what is the stock ratio.

Thanks everybody for all your help.

4LO 4.0 · 10-24-2008, 06:19 AM

Sport tracs have a 31 spline 8.8
To find out what gears you have from the factory, climb under it and look on the pan, it should have tag that will tell you the gears.

Check out this link, it will tel you how to read the tag.

http://www.therangerstation.com/tech_library/Axles.html

DoItBig · 10-24-2008, 07:30 AM

Quote:

Originally Posted by 4LO 4.0

Sport tracs have a 31 spline 8.8
To find out what gears you have from the factory, climb under it and look on the pan, it should have tag that will tell you the gears.

Check out this link, it will tel you how to read the tag.

http://www.therangerstation.com/tech_library/Axles.html

Thanks for the info!

ericautopart · 10-24-2008, 09:11 AM

I've got Ford OEM Trac Locks on sale right now for 190 if that would interest you.

10-24-2008, 01:18 AM	#1
DoItBig Wannabe Elite Explorer Enterprise, Alabama '05 SportTrac XLT 2WD 4.0 Join Date: Nov 2007 Posts: 77 Vehicle Specs (Original Poster)	Rear diff on a 05 Sport Trac XLT I've been wanting to suprise my pop with a locking rear diff since his truck at work (2006 Dodge Dakota 4x4) has one. I've been doing a lot of research and needing 4WD for much of the things he does is overrated, he does off roading, just not anything that you'd need full blown 4WD. I have found out that he does need a locking rear diff. Personal experience. I tried driving up a good sized hill, dropped it into 2nd for more torque before the climb, and she started climbing. Halfway there she stalls (stopped moving, not turned off) and the rear right wheel starts spinning. (i knew this because a. you heard the obligatory whine of lost traction b. dirt was begining to fling from that side) Just great. So i back down and try again from a different angle, and she does the same. Well having that happening to me was enough to worry about my dad. Hes an agressive pedaler and will give the engine just a bit too much gas on a grade, he also hates it when i drop the truck into second for more torque. He claims "you'll wear out the transmission faster" So as a general catchall I want to lower his rear end ratio and put an auburn ected on it. To do this, being a big noob at exploders technical specifications, I need to know how/or what differential is on the rear end of my Sport trac. And what is the stock ratio. Thanks everybody for all your help. __________________ Current DD: 1999 Jeep Wrangler SE My Garage Sitter:[Link]

10-24-2008, 06:19 AM	#2
4LO 4.0 Wannabe Elite Explorer AUGUSTA, GA 98 RANGER 4X4 Join Date: Jun 2007 Posts: 40 Vehicle Specs	Sport tracs have a 31 spline 8.8 To find out what gears you have from the factory, climb under it and look on the pan, it should have tag that will tell you the gears. Check out this link, it will tel you how to read the tag. http://www.therangerstation.com/tech_library/Axles.html

10-24-2008, 09:11 AM	#4
ericautopart Wannabe Elite Explorer Jersey Shore 1998 XLT 5.0L AWD Join Date: Feb 2008 Posts: 919 Vehicle Specs	I've got Ford OEM Trac Locks on sale right now for 190 if that would interest you.