Collection: Used Ram Transmissions For Sale | Auto Power Source

Browse Ram Transmissions by Year

Our Ram transmission inventory covers every model year from 1994 through 2024. Year-specific landing pages are rolling out. In the meantime, text us your VIN and we will match you to the exact transmission code for your truck or car within minutes.

Ram Transmissions We Cover

Seven core Ram / Mopar / ZF transmission families, all in stock and Shift-Tested. Click any card to jump to current inventory.

545RFE 5-Speed Automatic

Ram 1500, Ram Dakota (2001–2013). Ram's most common light-duty RWD/4WD automatic — proven workhorse with electronic shift control behind the 4.7L Magnum and 5.7L HEMI.

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65RFE 6-Speed Automatic

Ram 1500 (2012–present). The 6-speed evolution of the 545RFE — added gear and tighter ratios. Calibrated for the modern HEMI.

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68RFE 6-Speed Automatic (Diesel)

Ram 2500/3500 Cummins (2007.5–present). The heavy-duty 68RFE built for 6.7L Cummins torque. Emissions-year matching matters.

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ZF 8HP70 8-Speed Automatic

Ram 1500 (2013–present). The legendary ZF 8HP behind the 5.7L HEMI and 3.6L Pentastar — strong, smooth, modern.

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46RH / 47RH 4-Speed Automatic

Ram 1500/2500/3500 (1994–2002). The original heavy-duty 4-speed automatics — 46RH light-duty / 47RH diesel duty. Predecessors of the 48RE.

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48RE 4-Speed Automatic (Diesel)

Ram 2500/3500 Cummins (2003–2007). The pre-68RFE Cummins automatic — heavy-duty 4-speed with lockup torque converter.

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NV5600 6-Speed Manual (Diesel)

Ram 2500/3500 Cummins (1999–2005). The 600 lb-ft cast-iron 6-speed — diesel enthusiast favorite.

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G56 6-Speed Manual (Diesel)

Ram 2500/3500 Cummins (2005–2018). Mercedes-built heavy-duty 6-speed for Cummins applications.

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NV4500 5-Speed Manual (Heavy-Duty)

Ram 2500/3500 Cummins (1994–2000). The cast-iron heavy-duty 5-speed manual — predecessor to the NV5600. Diesel and big-block gas applications.

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NV3500 5-Speed Manual

Ram 1500, Ram Dakota (1994–2004). Aluminum-case 5-speed manual — gas truck workhorse.

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Why Buy a Used Ram Transmission from Auto Power Source

Ram runs one of the most varied transmission lineups in North America for a single-brand truck line. Heavy-duty automatics like the 545RFE, 65RFE, and 68RFE survive Ram 1500 and Cummins truck duty; the modern ZF-built 8HP70 powers the 5.7L HEMI Ram 1500; and the legendary NV4500, NV5600, and G56 manuals are still the favorite swap for Cummins-powered HD Rams. Matching the exact transmission code and emissions year is critical — a 68RFE from a 2010 6.7L Cummins is calibrated very differently than a 2013+ unit, and 545RFE generations differ between MDS and non-MDS HEMI applications. Get it wrong and you are looking at a tune at minimum, or a no-start at worst.

Every one of our 1,034+ verified Ram transmissions has been pulled from a low-mileage donor, cataloged by VIN, and held in our climate-controlled warehouse pending sale. Each unit goes through our six-step inspection: VIN-matching, Shift-Testing through every forward and reverse gear under load by our ASE-certified technicians, noise verification on the test stand, full visual inspection including pan and case, multi-angle photography for your approval, and palletized freight shipping. Rejected units never reach the buyer.

You pay a fraction of dealer-new pricing for identical Mopar engineering, ship free on a heavy-duty wooden pallet anywhere in the continental U.S., and you have 30 days from delivery to return for any reason — no restocking fees, no return freight charges. Up to a 3-year warranty covers you after install. Over 46,000 engines and transmissions shipped, 0% fitment-related returns.

Your Ram Transmission Options: Compared

Most Ram owners face four real choices when a transmission fails:

Tested used OEM hits the sweet spot — same Mopar / ZF engineering as new, a fraction of dealer cost.

Ram Transmission Buying Guide

Ram transmissions can be unforgiving when mismatched — the wrong year code can mean a stuck-in-limp-mode truck the day you install it. Five things to verify before you buy:

1. Match the donor's emissions year exactly on 68RFE Cummins units. A 68RFE pulled from a 2010 6.7L Cummins truck has different valve body programming than a 2013+ unit. Mixing them across the 2013 emissions-strategy break will throw codes and require a tune. We document donor year on every 68RFE we list.
2. 2WD vs 4WD is not interchangeable on Ram trucks. 4WD 545RFE, 65RFE, 68RFE, 48RE, and ZF 8HP70 units carry a different rear extension housing and output shaft for the transfer case. Always confirm drivetrain (2WD or 4WD) before ordering — and for the 8HP70, confirm whether the truck originally came with a transfer case adapter.
3. NV5600 6th-gear nut and input-shaft bearing wear is a known service issue. Every NV5600 we sell is stand-tested with audible inspection in all six gears under load. Any unit showing whine, bearing roughness, or a loose 6th-gear retaining nut is rejected. Ask us for the test log.
4. Fluid specs are not interchangeable. Mopar ATF+4 fills 545RFE/68RFE/42RLE/48RE; ZF Lifeguard 8 (HP-AT-FE/ZF Lifeguardfluid 8) is the only fluid for the 8HP70; G56 takes Mopar synthetic manual transmission lubricant. Using the wrong fluid will void your warranty and damage clutch packs within hundreds of miles.
5. Always run the donor VIN before installing. Mopar TIPM data ties the transmission control module to the donor's engine and chassis profile. We can pull and share the donor VIN for any Ram transmission in our inventory on request — it is the single best way to confirm an exact-fit match.

Our ASE-certified technicians verify every point above against your VIN before any transmission ships.

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