View Full Version : limited slip to posi

01-19-2009, 09:20 PM
i have a stock 03 ranger edge with limited slip and was wondering if they made a conversion to make it posi ive heard of some sort of tube that goes between the two axle halves to link them and then remove the spider gears? any help on where to get one or if its even worth it would be appreciated.

01-19-2009, 09:24 PM
limited slip is posi. Chevrolet uses the term "posi" for their limited slip. Ford uses the term "trac-lok" for limited slip.

01-19-2009, 09:30 PM
alright i HAVE: 1 wheel Peel I WANT 2 wheel Peel

01-19-2009, 09:32 PM
yo uhave an open rear end then and want a limited slip, wat rear end do u have 7.5 or 8?

01-19-2009, 09:35 PM
im not sure what rear i have its stock 03 4wd 3.0 ranger with 5 speed

01-19-2009, 09:35 PM
Look into a trac-lok unit. First you need to find out if you have a 7.5" axle or an 8.8" rear end. You might want to look into a powertrax no-slip unit. This can be installed in the driveway.

01-19-2009, 09:39 PM
im not sure what rear i have its stock 03 4wd 3.0 ranger with 5 speed

The easiest way to find out is to look at the sticker behind the drivers side door. You will see an axle code. Look that up and then tell us what it is. Its going to be a 2 digit code. We can then tell you what size rear end you have, what gears it has, and whether or not its limited slip. (you might have worn out clutches) You can also give us the information on the axle's tag.

01-19-2009, 09:42 PM
A 3rd easy way to find out is to take a look at the differential cover. If you have the 7.5" rear end, the top and bottom of the cover will be flat and the two sides will have curves in them, like these... ( ). An 8.8" axle will be more boxy with all four sides relativly flat with rounded corners.

01-19-2009, 09:47 PM
heres a muddy pic of the rear http://www.facebook.com/photo.php?pid=30108511&id=1053919342#/photo.php?pid=30108509&id=1053919342

01-19-2009, 09:51 PM
I don't have a facebook account so it won't let me view the picture.

01-19-2009, 09:54 PM
ill try again

01-19-2009, 09:57 PM

01-19-2009, 09:58 PM
Its very muddy but it looks like the 7.5" rear end.

01-19-2009, 09:59 PM
me thinks, 7.5

01-19-2009, 10:00 PM
it is a ranger and they tend to randomly drive into and most of the time out of MUD Holes. anyway thanks for the help.

01-20-2009, 12:35 AM
if its posi now, your clutches are fried. replace them and it will fix it

01-20-2009, 01:59 AM
being an edge I would guess 8.8, just look at the tag

01-21-2009, 02:18 PM
thats an 8.8

01-21-2009, 02:43 PM
You think so? I'm actually at a toss up. Too much mud caked on the corners and the top I can't see. The only thing I can clearly (kinda) see is the bottom. The 8.8" diff cover has a slight curve on the bottom where as the 7.5" is completely straight on bottom. Post the 2 digit code.

01-21-2009, 03:32 PM
I was going to say 7.5 just like my 3.0 Edge untill I went back and saw it was a 4x4 so it probably is the 8.8, door tag will tell. Just where abouts in Wisconsin are you at? I'm here in Stevens Point and Gotta_gofast is down Southern Wisconsin somewhere. Best thing is to get one of the "N0-Slip" lockers made by Richmond gear. Do in your driveway with no gear set-up. Got the instruction here if you want to see what is involved.

01-21-2009, 03:53 PM
Milton Wisconsin here! The initial cost of a powertrax no-slip is going to be between $400-$500 depending on the rear end. The trac-lok is going to be about $225. Since you're having a hard time figuring out what axle you have, I'm going to assume you do not know how to set the backlash properly (which will ruin your day). This means that in order to install the cheaper trac-lok, you must pay somebody the labor. This will put you up to about the cost of the no-slip. However, the no-slip guarentees that you will not have one-wheel spin, even if one wheel is suspended off the ground! The trac-lok will not do this. The no-slip can be installed without taking the carrier out of the differential in a couple hours with no special tools needed. So, you can spend the money on cheaper parts & labor costs or just spend the money on better parts!


7.5" Powertrax no-slip P/N = PWT-92-0675-2805 (open case)

8.8" (28spline) Powertrax no-slip P/N = PWT-92-0688-2807 (open case)
8.8" (28spline) Powertrax no-slip P/N = PWT-92-0688-2827 (limited slip case)

8.8" (31spline) Powertrax no-slip P/N = PWT-92-0688-3108 (open case)
8.8" (31spline) Powertrax no-slip P/N = PWT-92-0688-3127 (limited slip case)

EDIT: Do not purchase the cheaper Powertrax lock-rite as these are sometimes known to have rougher street manners.

01-21-2009, 04:10 PM
Well I really didn't want to say where you're from, left that up to you. It's not that hard to do. Had one in my 2000 4x4 for over 30K miles one it with no problem. Pull the axles out, remove the spider gears and put the new unit it. Not working so I thought I'd practice my drawing skills. Here's kind of what you have.


01-21-2009, 06:07 PM
if its a open 8.8, get a diff out of a mustang and throw in it. you can get get em anywhere for 20-50 bucks.

01-22-2009, 09:34 PM
do all mustangs with an 8.8 come with a posi

01-22-2009, 09:40 PM

01-23-2009, 08:22 AM
pretty sure most stang 8.8's are posi. all the ones ive ever seen or rebuilt are.the only one wheelers ive run across were rangers and mark VIII's

01-23-2009, 08:39 AM
'82 and newer mustangs had trac-loc standard.

01-24-2009, 12:01 AM
then why did you just say no

Bent Bolt
01-24-2009, 09:07 AM
mattchow88 seems to have limited mechanical experience so I would strongly suggest that he NOT swap out the carrier from a Mustang into his truck. That would require him to remove the ring gear from his carrier and install it to the Mustang carrier which involves setup, at the very least checking backlash.

01-24-2009, 10:05 PM
it aint that bad

01-26-2009, 09:11 PM
http://therangerstation.com/tech_library/Axles.html this will tell you how to figure out what axle you have