2021 Used Ram Transmissions For Sale | Auto Power Source

41
verified 2021 ram transmissions
3 years
max warranty
Photos before
shipment
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2021 Used Ram Transmissions For Sale

41 verified 2021 Ram transmissions in stock — 20 Truck 1500 Series units spanning both the Classic Style (5 Lug Wheel) and New Style (6 Lug Wheel) bodies, 14 heavy-duty Truck 3500 Series units, the full 2500 Series gas/diesel grid, and Promaster 1500 / 3500 / City vans. Every unit is inspected by certified technicians, VIN-matched to your truck, photographed before shipment, and backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.

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Up to 3-Year Warranty
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Photos Before Shipment
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Inspected & Verified
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Free Nationwide Shipping
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30-Day Money-Back
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Secure SSL Checkout

Browse 2021 Ram Transmissions by Model

Pick your 2021 Ram model to see exact fitments in stock. 2021 is a split year for the 1500 — the outgoing Classic body and the New Style body were built alongside each other and their transmissions do not interchange. Text us your VIN and a specialist confirms the match.

2021 Truck 1500 Series
20 units — the largest 2021 line, covering two different trucks: Classic Style (5 Lug Wheel) with Opt 850RE (DFT) or 8HP70 (Opt DFD / DFK), and New Style (6 Lug Wheel) with Opt 850RE (DFT), 8HP75 (Opt DFR / DFV) or 8HP95 (DFS). 4X2 and 4X4. Several DFR units also split by build date.
2021 Truck 3500 Series
14 heavy-duty units. 8-speed Pickup and Chassis Cab in 4X2 / 4X4, plus 6-speed AS66RC (6.4L gas) and AS69RC (6.7L diesel) Chassis Cabs with PTO (Left Side) or W/O PTO, and Opt ETL / ETM pickups in both drivetrains.
2021 Truck 2500 Series
4 units covering the complete grid: 4X2 and 4X4 in both Gasoline and Diesel. Confirm fuel type and drivetrain on the door-jamb sticker before ordering.
2021 Promaster
3 van units — Promaster 1500, Promaster 3500 and the smaller Promaster City. All automatic. The City is a separate vehicle from the full-size Promaster; do not cross-order.

Why Buy a 2021 Ram Transmission from Auto Power Source

Every 2021 Ram transmission on this page came out of an inventory-verified donor truck or van, was cataloged against its donor VIN, and is stored securely until it ships to you. Nothing ships without clearing our six-step inspection — VIN-matching, full visual inspection, multi-angle photography, and palletized freight.

Certified technicians visually inspect every unit, match it to your VIN and photograph it from multiple angles before shipment. You pay a fraction of dealer-new pricing for the same Ram engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get up to a 3-year warranty plus 30-day money-back. A 2021 1500 splits three ways — Classic vs New Style body, Opt code, and build date — so the VIN is the only safe way to order. Text your VIN and we will confirm.

📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →

Your 2021 Ram Transmission Options: Compared

Most 2021 Ram owners face four real choices when their transmission fails:

← Swipe sideways to see all columns →
Option Cost Reliability Warranty Fitment Match
Used OEM (this collection) $$$ Best Value High Up to 3 years VIN-matched
New OEM (dealer) $$$$$ 2-4× more High Manufacturer Exact
Aftermarket / Reman $$$$ Varies 6-12 mo May adapt
Junkyard $ Cheapest Unknown None DIY

Inspected used OEM hits the sweet spot — same Ram engineering as new, fraction of the cost.

2021 Ram Transmission Buying Guide

  1. Check your build date on a New Style 1500. This one is specific to 2021: the 8HP75 / Opt DFR units are cataloged by build date — Thru 04/09/21 and From 04/10/21 — so two trucks carrying the same Opt code can still take different units depending on when they were built. The build date is printed on the door-jamb sticker.
  2. Count the lug holes on a 1500. 2021 is a split model year: Ram sold the outgoing Classic Style 1500 (5 Lug Wheel) alongside the New Style 1500 (6 Lug Wheel). They are different trucks and take different transmissions — the single most common 2021 ordering mistake.
  3. Read the Opt code, not the gear count. Our 2021 stock carries 850RE, 8HP70, 8HP75 and 8HP95 units — several are 8-speed and none of them are interchangeable. The sales code (DFT, DFD, DFK, DFR, DFV, DFS) is on the door-jamb build sticker.
  4. On a New Style 1500, check 48-volt vs 12-volt. The eTorque (48 Volt System) and Non-eTorque (12 Volt System) trucks are cataloged separately because the mild-hybrid units differ electrically and will not drop into a 12-volt truck.
  5. On a 2500 or 3500, match fuel, drivetrain and body — and the PTO. Every 2021 line splits 4X2 / 4X4, and the tailshaft and transfer-case adapter differ. The 2500 also splits Gasoline / Diesel, and the 3500 6-speed units are AS66RC behind the 6.4L gas and AS69RC behind the 6.7L diesel, each with PTO (Left Side) or W/O PTO. PTO housings are not interchangeable.

Our ASE-certified technicians verify every one of these points against your VIN before any transmission ships.

📞 Need help choosing the right transmission? Talk to our team live, Mon–Fri 6:30 AM–10:30 PM EST.Call 1-877-313-8995

Frequently Asked Questions

What is the warranty on a 2021 Ram transmission?
Up to 3 years, depending on the specific unit. The exact warranty term is listed on each product page.
What does inspected mean?
Certified technicians visually inspect the unit before the transmission is cleared for sale.
How long until delivery?
Prep and ship time is 3-5 business days. Transit time is 2-3 business days via freight carrier after dispatch.
Can I see photos before it ships?
Yes. Multi-angle photos of the actual unit are sent before shipping.
Do I need my VIN?
Yes — 2021 is one of the trickier Ram years. The 1500 was sold as both a Classic Style (5 Lug Wheel) and a New Style (6 Lug Wheel) truck, several New Style units split by a build date around 04/10/21, and 2021 stock also divides by Opt code, drivetrain and 48-volt eTorque. Your VIN and build date resolve all of it.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
Why is this cheaper than the dealer?
It is the same Ram-engineered OEM unit, recovered from an inventory-verified donor vehicle rather than built new. You skip the new-part markup and still get VIN-matching, inspection and up to a 3-year warranty.
When can I reach your team?
Monday through Friday, 6:30 AM to 10:30 PM EST, at 1-877-313-8995 — or text your VIN any time and we will reply with options.
100K+
Engines+Transmissions In Stock
0%
fitment-related returns
All 50
states covered, free freight
Excellent
Customer Reviews
rated on Trustpilot

Our 6-Step Inspection & Shipping Process

Every 2021 Ram transmission we ship has been through these six steps:

1. VIN-Matching
We match the donor VIN to your VIN to confirm the body style, Opt code, build date, drivetrain and gear count — the five things that decide a 2021 Ram fit.
2. Inspected & Verified
Certified technicians visually inspect every unit.
3. Condition Check
Every unit is checked for completeness and external condition before it is photographed; the warranty covers internal faults.
4. Visual Inspection
Every accessible component is inspected: bellhousing, valve body, pan and seals, tailshaft, PTO housing where fitted, and sensor harnesses.
5. Photograph & Catalog
Multi-angle photos sent to you BEFORE we ship, for your approval.
6. Palletize & Ship
Strapped on a heavy-duty wooden pallet, shipped via freight at no charge.

What Our Customers Say

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Our Photos-Before-Shipment Guarantee

Before any 2021 Ram transmission leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and up to a 3-year warranty.

✉ Email Us at info@autopowersource.com
No match? Text VIN →