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Built to go beyond stock limitations, the BD Diesel TowMaster 4R100 Transmission is your solution for upgraded drivetrain durability on 1999–2003 Ford Super Duty trucks with the 7.3L Power Stroke (4WD). Engineered with performance and longevity in mind, this unit includes key upgrades to clutch packs, lubrication, hydraulics, and shift control to improve reliability under load.
From firmer shifts to additional lube circuits, a fully rollerized geartrain, and increased clutch counts, this BD transmission is dyno-tested and designed to handle real-world towing, work, and power demands. A full-flow auxiliary filter kit is included for added protection.
💰 $1,200 USD refundable core deposit required.
Transmission Highlights:
BD Aluminum Deep Pan adds 6 quarts of oil capacity
Includes auxiliary full-flow frame-mounted filter kit (1990–2003)
Recalibrated accumulator body delivers firmer, quicker shifts
Full shift kit with line mod valve for increased pressure
Added lube to overdrive planet, output shaft, and intermediate shaft
Drilled and tapped feed passages to prevent case leaks
Upgraded OD snap ring and machined center support
Reworked front pump and fully rollerized geartrain
Dyno-tested for quality assurance
Clutch Count Upgrades:
Coast Clutch: 2
Forward: 5 (+25%)
Direct: 5
Low Reverse: 7 (+17%)
Intermediate: 4 (+33%)
Overdrive: 4 (+33%)
(BD Diesel Transmissions only have warranty when running a BD Trans & Converter)
1999 Ford F-250 / F-350 / F-450 / F-550 7.3L Power Stroke (4WD)
2000 Ford F-250 / F-350 / F-450 / F-550 7.3L Power Stroke (4WD)
2001 Ford F-250 / F-350 / F-450 / F-550 7.3L Power Stroke (4WD)
2002 Ford F-250 / F-350 / F-450 / F-550 7.3L Power Stroke (4WD)
2003 Ford F-250 / F-350 / F-450 / F-550 7.3L Power Stroke (4WD)
⚠️ Excursion models require use of factory-style transmission pan.
⚠️ 2WD models with driveline brake require 4WD transmission.
⚠️ Converter must be BD brand and installed at time of install to retain warranty.
BD TowMaster 4R100 Transmission Assembly (No Converter)
BD Aluminum Deep Transmission Pan (except Excursion)
Auxiliary Frame-Mounted Full Flow Transmission Filter Kit
Upgraded Clutch Packs (pre-installed)
Machined Center Support
Reworked Front Pump
Aluminum Pressure Plug Kit
Installation Guide
BD Diesel has built its name on engineering transmissions that don’t just match stock—they outlast and outperform. The TowMaster 4R100 is purpose-built for trucks that work harder than factory designs can handle. From its heavy-duty internals to dyno-proven performance, BD delivers a transmission you can trust in demanding environments.
We are open Monday-Friday from 8am-6pm EST
Yes, customers located in and around the the Piedmont area are welcome to pick up their items from our retail location during normal business hours. Our address is:
Elite Race Fab
1514 Holbrook St Suite D-F
Greensboro, NC 27403
Elite Race Fab offers free ground shipping & handling to our retail customers within the lower 48 contiguous United States on most orders totaling $159.99 and higher, when the item being purchased is not a Freight/LTL item! Orders under $159.99 will be subject to a nominal $13.99 Flat shipping charge. Some exceptions and/or exclusions apply, in those scenarios you will be advised of any additional charges in the item details/description stating shipping exclussions/freight shipping required etc.
In regards to expedited and international shipping each order will need to be quoted on a case by case basis. You can obtain a quote two ways:
- From your shopping cart select "Request a Quote" prior to placing your order. We will review your proposed order and promptly respond with shipping estimates.
- Complete your order ahead of time indicating either expedited or international shipping during the checkout process. We will promptly determine shipping rates for your order and email you for approval and additional payment.
-Give us a call and we can ensure your item is shipped right then, to ensure you have it in time for your deadline.
We have been committed to offering all of our customers the lowest pricing throughout our website day in and day out. We value your business so much that we go a step further than our competitors. We use a third party software that proactively monitors all our competitor's websites/pricing so that we can make adjustments accordingly if needed to have the lowest prices. Thats right, no need to spend hours searching for the lowest prices, as ours will be the lowest.
As far as price matching, we dont want to write a check we cant cash, but we certainly want to earn your business. With that said, we will go above and beyond to match our competitor's pricing when it is needed. Simply email us, click the live contact button, or give us a call and be sure to have a link to our competitor's site and please factor in any shipping and handling their website will be charging. We will then ensure you get the lowest price, and either match or beat their pricing.
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