Ford E-450 Cutaway - rear axle ratio code

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Ford E-450 Cutaway - rear axle ratio code

June 28, 2018, 09:27:10 am

Hello everyone - please take a moment and post your rear axle ratio code. Per the attached picture:

Quote

If you do not know the axle ratio of your vehicle, check its Truck Safety Compliance Certification Label (located on the left front door lock facing or the door latch post pillar). Below the bar code, you will see the word AXLE and a two-digit code. Use this chart to find the axle ratio that corresponds to that code:

Rear Axle Ratio Non-Limited Slip Limited Slip
4.10
52/56
E2/E6
4.56
58/83/85
E8/F3/F5

I am most interested in knowing if the axles are non-limited slip or limited slip. Thank you!

Note: this information and picture were pulled from page 17 of the Ford RV & Trailer Towing Guide - see attached PDF.

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #1 – June 28, 2018, 10:16:15 am

1988 MB Ford E350, 4.10 ratio, Transmission G C6, Axle 52.

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #2 – June 28, 2018, 10:27:18 am

The G-30 and E350s have 4.11 ratios
E450s have 4.56.ratios.
I have never seen an LD, Factory equipped, with limited-slip.
No reason why you could've one installed but expect to spend a lot of money, few mechanics works on these monsters .
Axle rebuild-D70 HD | Flickr

LD orders the chassis in bulk, AFAIK, all are equipped the same.

Larry

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #3 – June 28, 2018, 10:38:44 am

I have a 2014 27MB. It has a 4:56 non LS axle. It is OK, so far, in the slippery stuff. This is likely due to the weight on the rear axle and the dual rear wheels.

When talking to Todd about placing an order, I explained that I really wanted the limited slip rear axle option on the chassis, which was, at the time, a $700 option from Ford. Todd stated "We don't do that."

I suspect that with the small number of coaches that Lazy Daze orders, they may not have the ability to specify anything beyond the basic, stripped down model. Our cab is pretty spartan.

Harold

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #4 – June 28, 2018, 11:36:59 am

With our '83, G-30, the only time through ice, snow, or mud I detected any slippage was at the Albuquerque Balloon Fiesta after 4" of rain overnight. The 20' or so of mud we traversed to the gravel camp road showed both duallies flinging mud, progress was steady, and we reached the road with no issues other than a severe mud buildup on both sides to later hose off the chassis. Hard to see ho LS would have made any difference.

Steve

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #5 – June 28, 2018, 12:18:36 pm

This is always a hoot to watch, not a Lazy Daze, tho:

https://www.youtube.com/watch?v=zRlxnKpXUmQ

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #6 – June 28, 2018, 07:35:14 pm

Quote from: Blueox25 - June 28, 2018, 10:38:44 am

. Todd stated "We don't do that."

I was told the same thing 16 years ago.

We have driven Some very iffy roads, in all sort of weather, and never experienced wheel spin.
I do carry snow cables in the winter.

Larry

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #7 – June 28, 2018, 07:46:06 pm

Quote from: HiLola - June 28, 2018, 12:18:36 pm

This is always a hoot to watch, not a Lazy Daze tho

It did quite well considering the size and weight....and without limited slip.

ARB does have a air locker, for the D70 rear axle.
DANA 70 ARB RD172

Larry

Re: Ford E-450 Cutaway - rear axle ratio code

Reply #8 – June 28, 2018, 08:24:39 pm

Quote from: Larry W - June 28, 2018, 07:46:06 pm

It did quite well considering the size and weight....and without limited slip.

ARB does have a air locker, for the D70 rear axle.
DANA 70 ARB RD172

Larry

Yes, on my Jeep I installed and ran ARB air-lockers and 4.88 gears on the front and rear axles. After five or so years I pulled everything, went back to stock 3.73s with the factory limited slip in the rear and a pocket-locker up front.

As you might imagine I recently switched back to Detroit Lockers with new 4.88 gears on the front and rear axles. Front axle was swapped for a high-pinion unit. My son enjoys working on vehicles and breaking them so I though it would be a great time to teach him about setting up hypoid gears. These Dana axles had the shims inside of the pressed on bearings so setting up gear patterns and backlash was especially time consuming.

For street use and especially an RV it seems to me as of the stock open differential is best for most every application. I can never imagine taking a new LD down a bumpy dirt road let alone anything worse. Yikes!

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