98 F250 LD manual transmission conversion?

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Originally Posted By: asand1

Anyone have a ZF and like it?


A ZF would be preferable to the M5OD, but will entail more fab work.

As far as I know, the M5OD is the only manual Ford offered in the '97-'03/'04 F-150/F-250 LD, so that's going to be the only relatively bolt up swap for this truck. The M5OD is a pretty light duty transmission to put behind a 5.4, which may be why Ford did not offer that combo.

A ZF with a modular bellhousing pattern will be out of a Super Duty. At the very least, you're looking at fabbing up a crossmember/mount for it. If there are clearance issues with the floor of the cab, you're also looking at a body lift for the truck. As mentioned before, you'll need the computer out of the donor truck. I'd also plan on a custom driveshaft at the least.

The parts you will need for this to be a relatively clean swap probably aren't things yards will just give away. Granted, this is the South, but the only Super Duties I see in yards are either badly wrecked, or totally ragged out 400K mile 2WD 5.4 autos. There aren't an abundance of trucks with the parts you need, and even fewer winding up in junkyards.

It sounds like what you are after is effectively a Super Duty 4x4 manual. If I got a free 2WD F-250 LD with a bad trans, and really wanted a Super Duty 4x4, I'd probably try to find a used trans for the LD and sell it. Even if you can fab things up, have plenty of work/storage space, etc, this sounds like a real headache of a swap to be honest, even if you're going for a trail rig/beater. The parts you need have limited availability and a $150 pile of parts probably won't get you far. You also have to keep in mind that your base truck has features like 4 wheel ABS and such that will need to be eliminated/bypassed/modified. If you're looking for the challenge, that's one thing, but I don't think you will get a good working HD beater with just a few hundred in parts...you will have to invest a lot of time, and are probably looking at thousands of dollars in parts in the end. Personally, I'd buy a Super Duty 4x4 and go from there.
 
Originally Posted By: asand1
I'm not going to ask how much, or how to, I already know the answer to that. I do have two other questions though.

My FIL's '98 F250 LD (F150 on a heavy frame and 7 lug) has a slipping 4R70W again. last time I did a filter and drain & fill X4 pumping from the cooler line. Its been working great for about a year, but it slipped yesterday. He is going to get another truck and asked if I want the F250.
What I want to do is go to the wrecking yard and get a manual trans, flywheel, clutch, starter, pedal assy, etc to swap in.

Does anyone know what trans bolts behind the Ford Modular OHC V8 (4.6 i think)? I would like to swap in a transfer case at the same time for another phase of the modifications. If anyone knows what transmission/transfer case/truck models to keep an eye out for I would surely appreciate it. The more HD the better.


A M5OD-R2 (Built by Mazda) would be the easiest swap, Don't think for a second these things are cheap out of a wreaking yard, They are rare in Modular V8 trucks, And if you do get one from a wreaker...It will probably be worn out & be out of warranty before you pull this swap off.

A ZF-5 is the best Heavy Duty choice, As 01rangerxl pointed out...Will require fab work. And also expensive/rare.

A Borg Warner 4406 is a good Transfer Case match to the M5OD-R2.
A NV-271 behind a ZF-5.

Yeah NP205's are strong as [censored], But the Lo range reduction is minimal, Their noisy, They leak (Usually) & really heavy!

You can run a Transfer case without a front DS & Shifter (Shift Fork in 2-Hi) for now, Forget the Divorced Case debacle later on!
 
If you are going to go as far as putting a ZF5 (As stated, the M5OD isn't exactly known for its strength) in it from a super duty, then you might as well put the 5.4 from the same truck in it as well. Swap the electrical harnesses for the engine and trans and throw in the PCM from the donor truck and pick up a little low-end grunt while you are there.

I think the best option is to get a 4R70 from a 01-03 and use it as a core to build a new trans.
The 01+ got an improved valve body and that will help a lot as most of the changes were in the OD circuit.
Have it built with OE Ford clutches, including the newest OD band, 7L3Z-7F196-A, which is a high-carbon material (more resistant to burning up)
Use a Superior K092 separator plate on the VB and drill the holes out.
JMOD1.JPG

Hole #1 (Intermediate clutch feed post Accumulator) #20
Hole #2 (Intermediate clutch feed pre Accumulator): 7/64
Hole #3 (Intermediate clutch exhaust) #15
Hole #4 & #5 (Direct clutch feed): #33
Hole #6 (Direct clutch exhaust): #20
Hole #7 (Reverse servo feed for Manual 1st): #43
Hole #10 (Reverse feed): #43
Hole #9 & #11 (Forward clutch feed): 1/8
Also install some Sonnax valves into the VB
76948-09 (Pressure regulator) [If you dont mind it hitting gears like a sledge hammer, use 76948-12K instead]
76948-29k (OD Servo Boost valve)
76948-02k (Pressure Reg Boost)
 
For cost and simplicity, I'm thinking about the M5OD. I'm guessing F150's, Explorers, and mustangs maybe? Any others to look for at the yard?

Remember, this is only the 4.6 engine.
 
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Well the local yard here has a few 4R70Ws, but no 5 speeds. I can get a 4R70W for $375, but I would still rather go manual. I'll have to call some yards in Eugene.
 
http://www.burnsideusedtruckparts.com/ in Portland has one from a '01. No miles
Light truck parts, 1-800-452-8004 in Portland has one was well, from a '99 with 163k
http://www.autowrecking.com/ in Albany shows one from a '01 as well, no miles.
These were all RWD trans. Even though I said up though 2008 I don't see any after 02, so I think it was dropped except behind the 6cyl engine after that.
I was just going by what wikipedia said, (who knew it could be wrong) I'd have to find the order guides to figure out kinda when it stopped behind the 4.6, yeah, probably not going to do that.
I might if I get bored.
 
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Swapping in a m5od from the same generation of truck will effectively cut your towing capacity in half. Making a marginally useful truck utterly worthless, imo.

With 3.73 gears, the manual trans f250 is only rated to pull 3200 lbs in regular cab form. With 3.55 it is rated at 2700 lbs.

The m5od sucks that bad.

Just replace or rebuild the 4r70. When not neglected, it is a very good and reliable trans.

As for fluid, the only fluid I use is a synthetic mercon v rated fluid.

Don't ruin your truck with a weak-suck m5od ...
 
I drove it home today and it felt fine. I will try some additive and just drive it, but it will have to wait until I can register and insure it.
 
Originally Posted By: asand1
Im confident I can rebuild my current trans for less than $150 and have a driving truck. According to the instructor/Technician the 4R70W is rated for 700lb ft of torque. I know this trans died of neglect, so I think there is no reason not to fix it and run it.


That rating is AFTER the torque multiplication of the Torque Converter is figured in! Not what the engine puts out at the Flexplate, 350-450 ft. lbs. is a more realistic figure.
 
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