Warren Diesel Transmission 4R100/E4OD OEM+
Warren Diesel Transmission 4R100/E4OD OEM+
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Warren Diesel 4R100/E4OD+: Affordable muscle for your 7.3L Super Duty. Triple-disc billet converter, Exody clutches, beefed-up packs, high-volume pump, and crisp shifts. Tougher than stock, built for towing and daily grind. No-nonsense reliability that lasts.
Our transmissions are built to order for maximum quality and reliability. Due to recent sales surges, delivery times are currently longer than average. When ordering, please plan accordingly—quick delivery isn’t guaranteed, but your patience ensures a top-tier product.
The Warren Diesel 4R100+ Transmission is the entry level, affordable upgrade your 1996-2003 Ford Super Duty with the 7.3L Powerstroke needs—delivering enhanced reliability for daily driving, heavy towing, or job-site demands.
The 4R100+ packs in premium updates that make it far tougher than a stock rebuild, all while keeping costs low and performance practical.
Built for Real-World Durability
This transmission combines targeted upgrades for better clutch holding power, fluid management, and shift quality:
- Triple-disc billet torque converter (sourced from 5R110W platform) with adapter for superior lockup strength and heat dissipation
- Exody high-performance clutches throughout
- OEM input shaft for proven reliability
- High-volume pump for improved pressure and lubrication
- Welded coast clutch for added durability
- Increased clutch packs: 3-pack overdrive, 3-pack intermediate, 5-pack direct, 4-pack forward, and beefy 6-pack low/reverse
- Machined center support for precision and longevity
- Modified valve body for crisp, reliable shifts
- 1800 stall speed converter optimized for diesel torque
- Factory-style Ford pan
These enhancements focus on fixing common 4R100 weak points—especially under load—making it an excellent choice for stock or mildly modified 7.3L trucks.
Easy Core & Shipping Options
No upfront core charge required—choose what works best:
- Return your core within 30 days of delivery → Skip the core fee completely. Warren provides prepaid return shipping for hassle-free convenience.
- Or pay a $800 core charge at checkout → Keep your old transmission (ideal if you’re parting it out or need a spare).
Ready to make your Super Duty more dependable for less? The 4R100+ from Warren Diesel delivers big value in a reliable, no-nonsense package—perfect for owners who want longevity without the high cost of full competition builds.
4R100 gear ratios
4-speed · RWD · 1000 lb-ft
| Gear | Ratio | Reduction | Typical use |
|---|---|---|---|
| 1st | 2.71:1 |
|
Launch from a stop, heavy towing and hauling, low-speed torque multiplication |
| 2nd | 1.54:1 |
|
Acceleration transition, moderate load pulling |
| 3rd | 1.00:1 |
|
Direct drive — general driving, moderate speeds |
| 4th | 0.71:1 |
|
Overdrive — highway cruising, fuel economy at steady speed |
| Rev | 2.18:1 |
|
Backing up |
Core Charge
A core charge is a refundable deposit added to the price. Pay it now, then return your used transmission within 30-days to get your money back!
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FAQ
How long does shipping take?
Most products ship in 3–7 days. Some will take longer. If a product needs more time, it will say so on its product page.
How do I know if a product fits my truck?
Each product page lists the year, make, and model it fits.
If you’re unsure, you can message us through our website, email, or Facebook, and we’ll confirm fitment for you.
Do you offer installation?
Yes. PSC Automotive & Diesel Repair installs everything we sell.
Call or message us to schedule an appointment.
What is your return policy?
- Returns accepted on new, unused items.
Some items are subject to a restocking fee, depending on the manufacturer.
Electrical parts, tuners, and custom-built items are non-returnable.
Full details are on our Refunds page.
What is your warranty policy?
Our warranty matches the manufacturer’s warranty.
If a part fails or has a defect, we will work with the manufacturer to get it replaced.
We do not warranty parts that were:
Installed incorrectly
Damaged by lack of maintenance
Removed or messed with after installation
Installed by another shop after we installed it
Full warranty details are on our Warranty page.
Will I get tracking information?
Yes. Tracking is emailed to you as soon as your order ships.
Check your spam folder if you don’t see it.
Do you offer customer support?
Yes! You can contact us anytime at:
Website chat
Email
Phone
Facebook or Instagram
We reply quickly during business hours.