Hi,
Count splines for 2001 f150 serie 7700 with ifs ?
I´m looking a locker for IFS F150 serie 7700


Thanks!

 

You are looking for a FRONT locker? That's not recommended.

Front is a reverse cut 8.8" 28 spline Ford diff. Rear is a 10.25" 35 spline Sterling diff.

 

Hi glc, thanks for reply.
I explain that in my ranch, my truck towed a livestock trailer on the rugged and steep dirt road in the up hills, where sometimes my truck doesn´t can kept going up with the standard 4x4, it gets stuck and sliding on the uphill.
That's why I need a locker only for limited use to get out of trouble.
The air locker ARB RD82 can converts from open diff to fullly locked. That seems like an interesting option for my truck.
Or other option is a drop-in locker Powertrax No-Slip Traction Systems 9206882807?
What do you think of those lockers?

 

Not familiar with specific lockers, but a selectable locker does sound like what you need. What are you using in the rear?

 

Maybe you need different tires?

 

None, because there are no lockers for sterling 10.25 "with c-clip (semi-floating)

 

It´s equipped with Goodrich All-Terrain tires LT245 / 75 R16E.

 

Does the rear have a factory limited slip?

I think this locker might work, it's the only locker on that site that doesn't specifically say full floating:

http://www.drivetrainshop.com/Yukon_...lf10.25-35.htm

Call them to confirm.