[79Ranger]

I see from the recent post from the Ford Fleet site that the rear axle is a 9.75 Sterling which is great, I also see that you can't get a DRW with the 3.73 ratio in a limited slip unless you can get the ambulance package.
I will be ordering one this year and will have a Detroit Truetrac installed by the dealer I'm ordering from.
Kinda weird why they wouldn't offer the limited slip across the board.

 

[rbisch]

I see from the recent post from the Ford Fleet site that the rear axle is a 9.75 Sterling which is great, I also see that you can't get a DRW with the 3.73 ratio in a limited slip unless you can get the ambulance package.
I will be ordering one this year and will have a Detroit Truetrac installed by the dealer I'm ordering from.
Kinda weird why they wouldn't offer the limited slip across the board.

Do you know if the Sterling 9.75 is for all Transit vans 150,250 and 350 and also if an ARB air locker is available for this rear axle?

 

[79Ranger]

From what was posted in the link to the Ford Fleet website, it would appear so....and it seems that ARB does have one for that axle.
Not what I want, but the guys I know that run them are very happy with them.

ARB AIR LOCKER FORD 9.75 INCH 34 SPLINE (RD150)

 

[rbisch]

From what was posted in the link to the Ford Fleet website, it would appear so....and it seems that ARB does have one for that axle.
Not what I want, but the guys I know that run them are very happy with them.

ARB AIR LOCKER FORD 9.75 INCH 34 SPLINE (RD150)

Thanks for the good information. Have had limited slip axles on my present and past trucks (dodge). Found they just do not work when you need them.

 

[ted]

Thanks for the good information. Have had limited slip axles on my present and past trucks (dodge). Found they just do not work when you need them.

I think thats the case with a number of LSD systems, aside from a lot of sports cars which I never hear complains about the LSD system

 

[79Ranger]

The Detroit Locker and Truetrac units work well as do the Torsen units.

 

[carryon]

Thanks for the good information. Have had limited slip axles on my present and past trucks (dodge). Found they just do not work when you need them.

what do you mean by they do not work?

 

[rbisch]

what do you mean by they do not work?

When you have equally poor traction under both wheels, only one wheel spins.

When stuck on ice, snow or mud only one tire spins. When backing on to my snow or ice covered drive (small incline) only one wheel spins. On dry pavement burn outs both wheels spin.

In other words the limited slip differential on my dodge truck helps me get stuck and then quits working, when I am are stuck. I would prefer it to work the other way around like a "selective locking differential".

 

[Todd]

I put an Eaton posi traction in my last E150. I live on a hill and never got stuck again in the winter. Todd

 

[mlts22]

Would an e-locker be useful for stuff like this?

 

[79Ranger]

Sure it would, just like the ARB.

 

[rbisch]

Would an e-locker be useful for stuff like this?

Any selective locker manual, electric or air is better then an open or limited-slip differential for off road conditions.

 

[ted]

Hmm interesting, I always thought LSD was good for off-road, I guess years ago it was but not now

 

[79Ranger]

They are but they have limitations. A good example is you have a Detroit locker and you are on ice, off camber...not good. Being able to run and open/locked diff is great.
For the street, IMO, a Torsen or Truetrac is the way to go, for me, it's for snow.

 

[JoeMannix]

Was wondering the size of Rear-end of 250 high roof, 9" 9.75" ? Thanks

 

[SuprMover]

They are all 9.75 full floating Sterling axles, 150,250,350. The 350HD has dual rear wheels with a similar axle setup.

 

[Jadist]

What size rear is in the transit now is it a 8.8?

 

[stevenmonrad]

T250 limited slip

When you have equally poor traction under both wheels, only one wheel spins.

When stuck on ice, snow or mud only one tire spins. When backing on to my snow or ice covered drive (small incline) only one wheel spins. On dry pavement burn outs both wheels spin.

In other words the limited slip differential on my dodge truck helps me get stuck and then quits working, when I am are stuck. I would prefer it to work the other way around like a "selective locking differential".

My 2015 T250 with optional limited slip 3.73 does work, easy to test backing up a steep gravel hill empty. Both wheels spin quickly and stay that way.

 

[rbisch]

My 2015 T250 with optional limited slip 3.73 does work, easy to test backing up a steep gravel hill empty. Both wheels spin quickly and stay that way.

You have good traction with both wheels on gravel.
Try same thing on snow, ice or mud where you have poor traction under both wheels.

 

[alarmist]

Where it helps is when one wheel is on a slick surface and the other has traction.