My neighbour wants to put a trak loc unit in his 98 F150. We know it has the 8.8 open diff which is 31spline. The stock trak loc unit would work awesome for him. Do you guys know of anywhere (cheap) to get the unit? Do they show up used very often? What other vehicles are they used in?

We are just interested in the chunk (diff housing, clutches, side/spider gears etc). Ford racing wants $375CAD with no warranty, or $550CAD with a 12 month/20k warranty. That is plus carrier bearings.

Thanks for any help.. ps a shop will be setting them up, we just want to get a hold of the parts.

Thanks.

 

that price sounds resonable, you might try www.4wheelparts.com, i dint find the trac lok in there catalog for the 8.8 tho, good luck

 

Keep an eye on e-bay. I watched several units come and go and finally found one I was comfortable with, good seller, low mileage unit. I got it for $50USD + shipping. Shipping to AK was a bear, but still total was <$120. Had a local shop install it with my 3.73's this summer. Works great, nice and tight. It has made a 100% difference this winter.
There are quite a few units on e-bay...just look for one from someone who is reputable. You can find some units that have been rebuilt (new clutch pack) on there as well..

Good luck.

 

You might do a search (must join to search) at www.fullsizebronco.com. I've read that the carrier from a Ford Explorer 8.8 would fit. Most are LS. There is much info there on 8.8 rears.

 

The 8.8 is all the same. The only difference is the mounts for the rear suspension. You can get a unit froma mustang, thunderbird, explorer, ranger, so forth as long as its the 8.8

 

and as long as it was a 31 spline, some of those you mentioned use a 28 spline and would not work with his axle shafts, just FYI

 

Good point, chip?

 

I have an open diff, would i be able to just buy the limited slip diff clutches and install them into my differential or do I have to buy an entire new unit?

I'm not going for anything with super performance, I just want to get up hills easier on slick days in the winter. The one wheel peel just doesn't do the trick.

 

no you would need the whole LS carrier

 

I have a 2002 5.4 Screw 3.55 open diff.... Where/how do I find what size rear and spline I have.... Like other's looking to find a good stock trak lock unit on Ebay. Thank You

 

Correct me if I'm wrong, but I'm sure you have the 9.75" rear end and that is 34 spline. Hope this helps.

 

no if he has the 4.6 or the 4.2 than he has the 8.8 31 spline rear, if he has the 5.4 than he most likely has the 9.75

 

I have a 2001 screw, what spline is the front 8.8?
Would the Powertrax locker for a rear end 8.8 31 spline work on the front?

 

no it would not the front is a rev 8.8 IFS 28 spline and will not work for the 31 spline rear carriers

 

Auto lockers like the Powertrax, Detroit locker, etc. generally don't work well anyway in front axles with Center Axle Disconnect systems. A CAD system, when operating in 2wd, needs 100% differentiation, meaning the side gears are actually spinning opposite directions.