OBS F350 brakes

[arse_sidewards]

Also E250’s and 350’s had rear disc brakes,

All vans went disc in '99

(this makes E-150s a source for 5x5.5 rear discs)

those can swapped on F250’s and 350’s without too much trouble. The E series vans used 8 on 6-1/2 bolt pattern wheels for many years.

IIRC it's basically the same rotor as you find on a 10.5 but in 8x6.5 instead of 170.

Someone should fire up Rockauto and fact check me on that though because it's been awhile. But I'm like 99% sure that OD, thickness and depth are all the same.

 

[Gdogg]

All vans went disc in '99

(this makes E-150s a source for 5x5.5 rear discs)

IIRC it's basically the same rotor as you find on a 10.5 but in 8x6.5 instead of 170.

Someone should fire up Rockauto and fact check me on that though because it's been awhile. But I'm like 99% sure that OD, thickness and depth are all the same.

I have a buddy who is scrapping a van and I just told him to cut the rear axle out and save it for me, because of this thread…. it got me thinking.

 

[AKnate]

I can't imagine discs in a 3/4 or 1 ton van are any better than drums on a 1 ton duallie... to the point of screwing with it. Least not on a road truck that sees maybe 3k miles a year.

It stops fine with 4 working brakes. Crazy that just missing braking on 1 rear would make so much difference.

 

[u2slow]

I can't imagine discs in a 3/4 or 1 ton van are any better than drums on a 1 ton duallie... to the point of screwing with it. Least not on a road truck that sees maybe 3k miles a year.

They have the same disc brakes on the dually too.

Drums supposedly fade off quicker.

 

[Gdogg]

They have the same disc brakes on the dually too.

Drums supposedly fade off quicker.

That’s because as something heats up it expands, so as the drum gets hot it gets larger in diameter, then the shoes are out of adjustment.

 

[Tiha]

All vans went disc in '99

(this makes E-150s a source for 5x5.5 rear discs)

IIRC it's basically the same rotor as you find on a 10.5 but in 8x6.5 instead of 170.

Someone should fire up Rockauto and fact check me on that though because it's been awhile. But I'm like 99% sure that OD, thickness and depth are all the same.

Rock auto is actually slightly off on the years when it comes to vans and data.

I went an looked at a power stroke van. It was a 96. It was supposed to have the power steering bracket I needed and the rear disc brakes I wanted.

It actually had neither.

Vans also had semi float and full floating rear ends. If you are just robbing parts for a conversion either rear end will work.

 

[arse_sidewards]

Rock auto is actually slightly off on the years when it comes to vans and data.

I'm quoting the years from first hand experience and also having searched this shit years ago in other parts catalog. I'm saying to use Rockauto for the rotor dimensions.

It was supposed to have the power steering bracket I needed and the rear disc brakes I wanted.

It actually had neither.

I could have told you it wouldn't have the brakes.

 

[u2slow]

Rock auto is actually slightly off on the years when it comes to vans and data.

I went an looked at a power stroke van. It was a 96. It was supposed to have the power steering bracket I needed and the rear disc brakes I wanted.

It actually had neither.

Vans also had semi float and full floating rear ends. If you are just robbing parts for a conversion either rear end will work.

Rockauto merely lists the lookup data the jobbers produce. 1stgen CTD (89-93) is another horrible mishmash.

I believe there was an E450 van starting in '96 (which all had rear disc) and that has likely 'polluted' the E-series data thru '98.

 

[AKnate]

What does the van use for a park brake?

 

[u2slow]

What does the van use for a park brake?

Early E450 used a trans/driveline brake like F-superduty.

By '99, wheel brakes (drum-in-hat) showed up. Mine (an e350 dually 70u) has visually identical hardware to the 01-02 dodge ram 2500. (rotor mounts different is about all). The 70HD and 80 were still put in the E450 after '99 without parking brake - not sure how many years.

 

[Tiha]

What does the van use for a park brake?

The semi floating rear end I got from a 97 E250 had the hat style parking brakes. Just like the newer superduties.

The piston area of the Van calipers is slightly bigger than the newer super duty rear ends. Probably not enough to notice, but it shows that it is a worth while swap, you are not just trying to make something work that shouldn't be there. Like the single piston caddy calipers.

 

[arse_sidewards]

What does the van use for a park brake?

drum in hat

 

[arse_sidewards]

Early E450 used a trans/driveline brake like F-superduty.

. Mine (an e350 dually 70u) has visually identical hardware to the 01-02 dodge ram 2500.

This is not the first time (though maybe the first time was you as well) I have heard someone say that the E-van shit matches the "rare" couple years where Dodge had started rear discs but hadn't yet stopped using Dana axles.

FWIW I can tell you that 99 E350 D60 has a different brake flange than a 2nd gen Dodge 3500.

Lbhsbz you got any access to industry insider software shit to do some sleuthing for us?

 

[u2slow]

FWIW I can tell you that 99 E350 D60 has a different brake flange than a 2nd gen Dodge 3500.

Must be a dodge drum flange?

I can confirm that my e350 70u (disc) has the same housing flange as my 02 ram 2500 Dana 80 (disc).

 

[arse_sidewards]

Must be a dodge drum flange?

Yes it's drum. They must have changed the flange when they went disc.

 

[AKnate]

Set of drums and shoes is about $200. Can't think of a reason the headache of swapping to disc would pencil out.

 

[u2slow]

Set of drums and shoes is about $200. Can't think of a reason the headache of swapping to disc would pencil out.

Is the r&p as big as a you want? Ratio? Width? Traction aid? There might be more reasons to change the diff than just the brakes.

Also, rear rotors got bigger for 03+ dodge and 05+ Ford. (17" wheels minimum).

 

[u2slow]

Yes it's drum. They must have changed the flange when they went disc.

Page with pics and CAD drawing - of the disc style flange:

fordmann.com | F-350: Sterling Rear Disc Conversion

 

[AKnate]

Is the r&p as big as a you want? Ratio? Width? Traction aid? There might be more reasons to change the diff than just the brakes.

Yes
Yes
Yes
Yes

Just the brakes sucked which i fixed

 

[arse_sidewards]

Page with pics and CAD drawing - of the disc style flange:

fordmann.com | F-350: Sterling Rear Disc Conversion

I know the Ford drum flange doesn't match the disc flange (for 3/4 ton and larger axles, not true about 9", 8.8, 7.5 and 9.75 shit).

I'm saying that whatever Dana is slapping on the Dana sourced axles isn't the same between 90s Dodge drum and Ford 00s disc, which isn't at all surprising.

 

[Lbhsbz]

This is not the first time (though maybe the first time was you as well) I have heard someone say that the E-van shit matches the "rare" couple years where Dodge had started rear discs but hadn't yet stopped using Dana axles.

FWIW I can tell you that 99 E350 D60 has a different brake flange than a 2nd gen Dodge 3500.

Lbhsbz you got any access to industry insider software shit to do some sleuthing for us?

I'm not reading through 3 pages of shit to figure out what the question is. What's the question?

 

[arse_sidewards]

I'm not reading through 3 pages of shit to figure out what the question is. What's the question?

The root question is basically do you have access to backing plate/caliper mount dimensional info and can you share it with us?

And if so can you let us know if there's any drum brake applications a 2002 E350 single rear wheel backing plate will bolt right onto and if there's any disc brake applications that share a backing plate flange with a 1994 Ford F250. And by "bolt on" I mean "share one locating hole and have enough overlap that any others can be egged out or drilled"

If you can answer those correctly then I have more questions about rotors but I can mostly answer those myself

 

[Lbhsbz]

No.

 

[arse_sidewards]

That's a shame.

 

[rattle_snake]

hydroboost.

I run 1994 F350 axle/brakes and they work fucking awesome. Pile you up in the windshield. Aggressive front pads. No ABS. prop valve at max. way smaller rear wheel cylinders (4-5 sized smaller than stock) to keep rear from locking up.

 

[JR4X]

hydroboost.

I run 1994 F350 axle/brakes and they work fucking awesome. Pile you up in the windshield. Aggressive front pads. No ABS. prop valve at max. way smaller rear wheel cylinders (4-5 sized smaller than stock) to keep rear from locking up.

I think I’ve already said this but I’ll say it again. I have FSuperduty hydroboost in my C350 centurion. Factory brake components on the axles. No RABS and no proportioning valve whatsoever. I didn’t even move the fulcrum pin up on the brake pedal arm. Maybe it having a little extra rear weight bias than an empty pickup truck. I have zero complaints about it and there is nothing to improve. I’ve never skidded the rear tires on it since the HB upgrade.

The reason I embarked on that upgrade was because when the RABS was failing sometimes I had zero brake pressure, the pedal would go straight to the floor. Then the next pedal stroke the rear tires would lock up and skid with the slightest touch of the pedal. So it skids the tires less now than with the factory vacuum boosted system

 

[AKnate]

As far as I can tell it's all working ok.

I'm running Wagner Severe Duty pads on the steer and whatever Schucks had for shoes on the drive.

I mean can't really expect it to stop on a dime with ~4.5-5 tons in the bed.