---
title: "How to Identify an Aisin AS69RC Transmission in Your Commercial or Ram Chassis Cab"
seoTitle: "How to Identify an Aisin AS69RC Transmission (Sales Code DF2) | Lynch Truck Center"
description: "4 fast ways to verify if your Ram 3500, 4500, or 5500 Chassis Cab has an Aisin AS69RC heavy-duty PTO transmission: driver-side dipstick, code DF2, and PTO ports."
canonicalUrl: "https://www.lynchtruckcenter.com/manufacturer-information/how-to-identify-aisin-transmission"
pageType: "informational-pillar"
updatedAt: "2026-10-21T12:00:00.000Z"
---

# How to Identify an Aisin AS69RC Transmission in Your Commercial or Ram Chassis Cab

> **Powertrain & PTO Engineering Pillar** — Verify under-hood dipstick position, glovebox build code DF2, and dual-side 8-bolt PTO access covers before ordering your wrecker, carrier, or crane body.

## Quick Engineering Answer: How do you tell if a Ram truck has an Aisin transmission?
On Ram 3500, 4500, and 5500 6.7L Cummins Turbo Diesel trucks, check the transmission dipstick location under the hood: the heavy-duty Aisin AS69RC dipstick tube is on the driver's side (left), whereas the standard 68RFE dipstick is on the passenger's side (right). You can also confirm Sales Code DF2 on the build sheet or dual 8-bolt PTO covers on the transmission case.

### Key Fleet Takeaways
- Driver-side transmission dipstick = Aisin AS69RC (Sales Code DF2)
- Passenger-side transmission dipstick = Chrysler 68RFE (Sales Code DG7)
- Dual left & right 8-bolt PTO ports allow direct hydraulic pump mounting for Miller Industries wreckers
- Increases Ram 5500 Max GCWR up to 43,000 lbs with commercial shift calibration

## Key Specifications
- **Aisin Diesel Sales Code:** DF2 (6-Spd Aisin AS69RC HD Auto)
- **Dipstick Location:** Driver Side (Left side of 6.7L Cummins bay)
- **Max Ram 5500 GCWR:** 43,000 lbs (With 4.88 Axle Ratio & DF2)
- **PTO Mounting:** Dual 8-Bolt (Left & Right SAE Openings)

## Step-by-Step Verification Checklist
1. **Inspect the Under-Hood Transmission Dipstick Side** — Stand in front of the truck facing the 6.7L Cummins engine bay. If the transmission fluid dipstick handle is on the Driver Side (left side of the vehicle), it is an Aisin AS69RC. If it is on the Passenger Side near the firewall, it is a 68RFE.
   - *Engineer Note:* Applies to Ram 3500 High-Output and all Ram 3500/4500/5500 Cab & Chassis models.
2. **Verify the 3-Character Sales Code on the Build Sheet or Glovebox Tag** — Request the VIN build sheet or inspect the equipment label. Look for code DF2 (Aisin AS69RC 6-Speed HD Auto with 6.7L Diesel) or DF3 (Aisin AS66RC 6-Speed Auto with 6.4L HEMI Gas).
   - *Engineer Note:* Lynch Commercial Sales can pull full Stellantis build sheets instantly by 17-digit VIN.
3. **Check Underneath for Dual 8-Bolt SAE PTO Access Covers** — Inspect the transmission main case beneath the cab rails. The Aisin AS69RC features stamped steel 8-bolt PTO aperture plates on both the left and right sides, plus a riveted metal Aisin serial tag.
   - *Engineer Note:* Check exhaust routing clearances when selecting left-side vs. right-side Chelsea 272/280 series PTOs.
4. **Confirm Factory Upfitter Electronic Module (VSIM) & Stationary Elevated Idle** — Ensure the chassis includes factory PTO prep wiring so the engine ECM smoothly ramps idle RPM (900–1,500 RPM) when the hydraulic winch or stinger boom is engaged.
   - *Engineer Note:* Our Waterford, Chicago, and Denver upfit bays program custom PTO ramp speeds during body installation.

## Aisin AS69RC vs. Aisin AS66RC vs. Chrysler 68RFE Specifications
| Specification | Aisin AS69RC (Diesel) | Aisin AS66RC (Gas) | Chrysler 68RFE |
| :--- | :--- | :--- | :--- |
| OEM Sales Code | DF2 | DF3 | DG7 |
| Engine Pairing | 6.7L Cummins Turbo Diesel | 6.4L HEMI V8 Gas | 6.7L Cummins Standard Output |
| Dipstick Position | Driver Side (Left) | Passenger Side (Right) | Passenger Side (Right) |
| PTO Access Ports | Dual-Side (Left & Right 8-Bolt) | Dual-Side (Left & Right 8-Bolt) | None (No Heavy PTO Port) |
| 1st Gear / Reverse Ratio | 3.75:1 / 3.54:1 | 3.75:1 / 3.54:1 | 3.23:1 / 4.44:1 |
| Ideal Vocational Upfits | Century/Vulcan Wreckers, 19.5' Carriers, Crane Bodies | Municipal Dump, Service Bodies, Snow Plows | Fifth-Wheel Hauling (Non-PTO) |

## Why Transmission PTO Capability Matters for Wreckers & Vocational Bodies

Mounting an under-hood belt-driven clutch pump on a truck without a factory PTO port limits hydraulic flow (GPM) and operating pressure under heavy winching loads.

With an **Aisin AS69RC (Sales Code DF2)** on a Ram 4500/5500 or an **Aisin A465** on an Isuzu NPR-HD/NRR cabover, our upfit team mounts a direct-coupled **Chelsea 272/280** or **Muncie** wet-spline hydraulic pump for continuous recovery, rollback deck, or crane performance.

> **dot-compliance:** Always program Stationary Elevated Idle Control (SEIC) via the Ram VSIM module when installing a live-drive PTO so hydraulic GPM stays constant under load.

## Frequently Asked Questions
### Do all Ram 4500 and 5500 Chassis Cabs come with an Aisin transmission?
Yes. Every Ram 4500 and 5500 Chassis Cab equipped with the 6.7L Cummins Turbo Diesel comes standard with the 6-speed Aisin AS69RC (Sales Code DF2).

### What transmission fluid does the Aisin AS69RC require?
The Aisin AS69RC requires Mopar ASRC (Aisin Warner AW-1 / JWS 3309 spec) automatic transmission fluid—do not mix with ATF+4. Under severe commercial towing or PTO duty, service every 30,000 miles or 250 PTO hours.

### Can Lynch Truck Center install a Chelsea PTO on my Aisin transmission?
Yes. Waterford WI, Chicago IL, and Denver CO all stock genuine Chelsea and Muncie PTOs, hydraulic pumps, and Miller Industries components.

---
*Published by Lynch Truck Center (Waterford, WI • Chicago, IL • Denver, CO) — https://www.lynchtruckcenter.com/manufacturer-information/how-to-identify-aisin-transmission*