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7.3 Powerstroke Gear Reduction Starter – Denso TG228000-8420
Upgrade your 7.3L Powerstroke with the genuine Denso TG228000-8420 gear reduction starter. This OEM-quality OSGR (Offset Gear Reduction) unit delivers the high-torque cranking power these high-compression diesels demand, especially in cold weather or on high-mileage trucks.
Key Features & Benefits
- Genuine Denso construction – Built to strict OE specifications with premium copper terminals for clean, reliable current flow
- 4.0 kW / ~5.36 HP output – Stronger, more consistent cranking torque than many stock or reman starters
- Gear reduction design – Compact high-speed motor with planetary gear reduction for maximum torque while drawing less amperage from your batteries
- 13-tooth pinion, clockwise rotation, 12-volt system
- Heavy-duty durability – Sealed bearings, robust housing, and impact torque limiter to protect the ring gear
- Proven reliability – Trusted by diesel owners for daily drivers, work trucks, and extreme-condition use
Fitment
Direct-fit replacement for 1994.5–2003 Ford 7.3L Powerstroke / Navistar T444E applications, including:
- F-250 / F-350 / F-450 / F-550 Super Duty
- E-350 / E-450 / E-550 Econoline & Super Duty
- Excursion
- Related chassis and van applications
Cross references / replaces: Lester 17802, Ford F4TZ-11002-A / related numbers, Denso 228000-8420, and many common aftermarket equivalents (e.g., 91-29-5448N, M008T50071, 246-30134).
Installation Notes
This starter mounts with two bolts. Some original applications used three; two bolts provide more than adequate security. The unit is larger and more robust than many factory starters—check clearance to the crossmember on certain OBS models (minor grinding may be needed in tight applications). No core charge on new units.
Condition: Brand new Denso
Typical warranty: 12 months
Give your 7.3 the strong, reliable starts it deserves. The Denso TG228000-8420 is widely regarded as one of the best gear-reduction upgrades available for these engines.
7.3 Powerstroke Gear Reduction Starter – Denso TG228000-8420
Upgrade your 7.3L Powerstroke with the genuine Denso TG228000-8420 gear reduction starter. This OEM-quality OSGR (Offset Gear Reduction) unit delivers the high-torque cranking power these high-compression diesels demand, especially in cold weather or on high-mileage trucks.
Key Features & Benefits
Genuine Denso construction – Built to strict OE specifications with premium copper terminals for clean, reliable current flow
4.0 kW / ~5.36 HP output – Stronger, more consistent cranking torque than many stock or reman starters
Gear reduction design – Compact high-speed motor with planetary gear reduction for maximum torque while drawing less amperage from your batteries
13-tooth pinion, clockwise rotation, 12-volt system
Heavy-duty durability – Sealed bearings, robust housing, and impact torque limiter to protect the ring gear
Proven reliability – Trusted by diesel owners for daily drivers, work trucks, and extreme-condition use
Fitment
Direct-fit replacement for 1994.5–2003 Ford 7.3L Powerstroke / Navistar T444E applica[...]
7.3 Powerstroke Gear Reduction Starter – Denso TG228000-8420
Upgrade your 7.3L Powerstroke with the genuine Denso TG228000-8420 gear reduction starter. This OEM-quality OSGR (Offset Gear Reduction) unit delivers the high-torque cranking power these high-compression diesels demand, especially in cold weather or on high-mileage trucks.
Key Features & Benefits
- Genuine Denso construction – Built to strict OE specifications with premium copper terminals for clean, reliable current flow
- 4.0 kW / ~5.36 HP output – Stronger, more consistent cranking torque than many stock or reman starters
- Gear reduction design – Compact high-speed motor with planetary gear reduction for maximum torque while drawing less amperage from your batteries
- 13-tooth pinion, clockwise rotation, 12-volt system
- Heavy-duty durability – Sealed bearings, robust housing, and impact torque limiter to protect the ring gear
- Proven reliability – Trusted by diesel owners for daily drivers, work trucks, and extreme-condition use
Fitment
Direct-fit replacement for 1994.5–2003 Ford 7.3L Powerstroke / Navistar T444E applications, including:
- F-250 / F-350 / F-450 / F-550 Super Duty
- E-350 / E-450 / E-550 Econoline & Super Duty
- Excursion
- Related chassis and van applications
Cross references / replaces: Lester 17802, Ford F4TZ-11002-A / related numbers, Denso 228000-8420, and many common aftermarket equivalents (e.g., 91-29-5448N, M008T50071, 246-30134).
Installation Notes
This starter mounts with two bolts. Some original applications used three; two bolts provide more than adequate security. The unit is larger and more robust than many factory starters—check clearance to the crossmember on certain OBS models (minor grinding may be needed in tight applications). No core charge on new units.
Condition: Brand new Denso
Typical warranty: 12 months
Give your 7.3 the strong, reliable starts it deserves. The Denso TG228000-8420 is widely regarded as one of the best gear-reduction upgrades available for these engines.
Q
Bart Robards • 03/28/2025, 2:46:18 PM
Is this a true Denso, not a Chinese knock-off?
A
04/02/2025, 3:36:23 PM
All products Full Force Diesel sells are true to manufacturer.
Q
Stephen Anderson • 08/14/2025, 11:43:43 PM
Will this starter fit a 2001 f350 7.3
A
08/15/2025, 9:13:55 PM
7.3 Powerstroke 1994.5-2003. Starters all all the same.
Q
Richard Lutz • 08/18/2025, 0:48:04 AM
Where is this starter manufactured?
A
08/18/2025, 7:17:21 PM
The manufacturer doesn't specify that information.
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5/5 Stars out of 2 Reviews
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Mike (Ca) | April 25th, 2026
For those who dont know this is the starter to get for a 7.3, i have a 97 obs and a 98 e350 and this starter is in both rigs. These things are monsters in sheer size compared to the stock units and spin the motor over with some serious authority you can easily tell the difference just get one itll be thelast starter you need. When chaging out starter make sure to clean all your contacts.
Colton (ID) | October 21st, 2025
This starter made all the difference in my truck. With the old factory starter, it turned slow and made it sound like an old wore out truck. Now with this starter, my truck way happier! It turns over like a 6.7! Couldn’t be more impressed. Full force has the best price out of all the other sites!
Proposition 65 Warning Information -
P65Warnings.ca.gov
Fits: 7.3 Powerstroke 1994-2003
Fits: Universal
Fits: Universal