2021 Used Ford Mustang Transmissions For Sale | Auto Power Source

5
verified units in stock
3 years
max warranty
Photos before
shipment
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2021 Used Ford Mustang Transmissions For Sale

5 verified 2021 Ford Mustang transmissions in stock — the 2.3L EcoBoost in both 10-speed automatic and 6-speed manual builds, plus the 5.0L Coyote V8 manual (VIN F). Each is VIN-matched to your vehicle, inspected by certified technicians, photographed before shipment, and backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.

Text Your VIN — Match Options↓ Browse all 5 unitsor call 1-877-313-8995 · Mon–Fri 6:30 AM–10:30 PM EST
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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

Why Buy a 2021 Ford Mustang Transmission from Auto Power Source

Every 2021 Mustang transmission we ship is pulled from a low-mileage donor vehicle, cataloged by VIN, and stored securely until it ships to you. Our ASE-certified technicians run each unit through a visual inspection before it is cleared for sale.

The 2021 Mustang splits three ways — a 10-speed automatic and a 6-speed manual behind the 2.3L EcoBoost, and a separate manual gearbox behind the 5.0L Coyote V8 — and casting IDs differ even within the same engine and gearbox type, so VIN-matching is critical. Text your VIN and we will confirm the exact match before you order.

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

Your 2021 Mustang Transmission Options: Compared

Most 2021 Mustang 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 Ford engineering as new, fraction of the cost.

2021 Mustang Transmission Buying Guide

  1. Settle automatic vs manual first. The 2021 Mustang ships with a 10-speed automatic or a 6-speed manual, and a swap between the two is a driveline project, not a drop-in.
  2. Match the engine behind it. The 2.3L EcoBoost and the 5.0L Coyote V8 use different gearboxes — a V8 manual will not bolt to an EcoBoost, and vice versa.
  3. Read the casting ID, not just the displacement. Our 2.3L automatics carry IDs MR3P-7000-MA and JR3P-7000-MB; the manuals carry GR33-7003-EA and FR33-7003-CB thru CD. Same engine, different units.
  4. Confirm the 8th-digit VIN code. VIN F identifies the 5.0L V8 build — check it against your door-jamb tag before ordering a V8 gearbox.
  5. Always run the donor VIN if available. We provide it on request for any 2021 Mustang transmission in inventory to verify mileage and history.

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 Mustang 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 each unit before it 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?
Strongly recommended. The 2021 Mustang spans two engines, automatic and manual gearboxes, and several casting IDs within the same engine.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
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 Mustang transmission we ship has been through these six steps:

1. VIN-Matching
We match the donor VIN to your VIN to confirm transmission code, casting ID, and gearbox type.
2. Inspected & Verified
Certified technicians visually inspect every unit.
3. Condition Check
Checked for completeness and external condition; the warranty covers internal faults.
4. Visual Inspection
Every accessible component is inspected: case, valve body, pan, seals, harness connectors, and mounts.
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 Mustang 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 →