Dexter makes a good axle and the Scamp 13 uses the Torflex #9 axle. With a 81 S-13 the axle swing arms face forward. A lot of people choose to turn the axle around to face to the rear like the newer Scamps when replacing the axle. If you choose to stay with the orig. config. and you add brakes they will have to be swapped to the correct orientation. You will have to order the axle through a distributor usually Redneck Trailer. They will have a worksheet with about 10 option choices and measurements to fill out when you order your new axle. S-13's come with a 10 deg up angle swing arm. I usually go with a 10 deg. down angle for more ground clearance but it also raise your hitch and door sill height.

Eddie

I just got my 1983, Scamp trailer replaced by Little House Custom in TX.  Larry gave me this information.The Bolt on Dextoer axle has 10" Brakes , 4.5 raised up.

The PO on the label is actually our distributors PO to Dexter.  We just order verbally.  If you want permanent documentation of how it was built, it's all on that label.  

HF =hub face dimension

OB = outside of mounting bracket to outside of mounting bracket

10U= 10 degree up

10H= Dexter #10 axle

2500lbs is the suspension capacity, even though a #10 can be built up to 3500lbs capacity.

A replacement could be ordered 20 years from now using that data.

There's also a serial number in front of the word "Capacity"  all of the specifications for that axle are encoded into that serial number in "Dexter speak"    Including the electric brakes and the lug bolt spacing.    The serial number alone is enough to order a replacement from Dexter.

Tom

Plano, TX