31 spline rearend on 2003 mustang gt.

[Speed_Mister]

Im putting on 31 spline axle and a posi differential with 4.10 gears. Am i safe to use slicks/Drag radials? like i wont break my axle will I with sticky tires? and what should i launch at with slicks or radials? my mods are BBK cold air intake, throttle body spacer, steeda underdrive pullies, with Flowmasters. with 8.8 inch. 31 spline rearend with 4.10's.

[t0t4lbl4ck0ut]

I'd hope your rear end wouldn't break with that kind of power lol I've read that with the 31 spline it's the diff that usually goes before anything else. What kind did you get.

[Speed_Mister]

it came out of a explorer. i heard ford explorers diff. can handle lots of power.

---------- Post added at 02:00 PM ---------- Previous post was at 01:57 PM ----------

oh my cars tuned too. if that makes a difference.

[t0t4lbl4ck0ut]

Idk about a explorer rear end. I know if you bought moser axels and a aftermarket diff you'd have a very very strong rear end.

[Speed_Mister]

they are moser 31 spline axles.

[t0t4lbl4ck0ut]

Ah. Well with it being a 31 spline I'd figure it's gonna last longer then a stock 28 spline

[Rm360]

Originally Posted by Speed_Mister

it came out of a explorer. i heard ford explorers diff. can handle lots of power.

---------- Post added at 02:00 PM ---------- Previous post was at 01:57 PM ----------

oh my cars tuned too. if that makes a difference.

I had to ford explorers and both ended with the same problem , leaky axel seals , caused from the drag from towing. The force put on the axels and bearings and seals wears out the housing causing the leaks once they start to leak its almost impossible to get them to stop because the housing becomes ovaled out. IMO I would consider getting a rear out of a mustang

[Speed_Mister]

arent they stronger than the mustang differential im wanting to be able to launch my car at higher rpms with sticky tires for drag racing.

[aegischief]

Originally Posted by Speed_Mister

arent they stronger than the mustang differential im wanting to be able to launch my car at higher rpms with sticky tires for drag racing.

Not sure if the explorer and F150 differentials are made differently or not, but I had a F150 unit with 2 extra clutches in my cobra and it never gave me any trouble. I actually broke 2 eaton differentials before switching to the f150 unit.

I was using moser 31 spline axles with Nitto DRs. Drove it like I stole it when I was at the track.

[tc x 4]

Originally Posted by Rm360

I had to ford explorers and both ended with the same problem , leaky axel seals , caused from the drag from towing. The force put on the axels and bearings and seals wears out the housing causing the leaks once they start to leak its almost impossible to get them to stop because the housing becomes ovaled out. IMO I would consider getting a rear out of a mustang

My f150 has 330,000 mi never a prob with rear end or seals.

[Rm360]

Originally Posted by tc x 4

My f150 has 330,000 mi never a prob with rear end or seals.

The explorer came with 2 different tow packages, standard package was stock suspension , 4x4, trans cooler, etc. and 3.55 gears. The upgrade was the heavy duty package with upgrades to all the above plus 3.73 gears. I should of stated mine were both standard and IMO suspension and such was the cause for failure . If the rear came out of a explorer with the heavy duty package I have no doubt you'll be fine. The f150 rear is a proven winner.

[Speed_Mister]

Well I had my 31 spline axles, 4.10 gears, and f-150 differential installed. Took it too the track with slicks launched at 5500 rpm didn't break anything ran a 1.7 60 foot.

[Mmustang01]

Originally Posted by t0t4lbl4ck0ut

Idk about a explorer rear end. I know if you bought moser axels and a aftermarket diff you'd have a very very strong rear end.

+1