Allison Transmission Fluid Capacity Chart(All Models)

Using the wrong amount of fluid can lead to overheating, slipping, harsh shifts, or even transmission failure. This guide provides a detailed fluid capacity chart for nearly all major Allison transmission models, helping you perform fast and accurate maintenance.

Allison Transmission Fluid Capacity Chart

Transmission Model	Dry Capacity (Quarts)	Initial Fill (Quarts)	Drain & Refill Capacity (Quarts)
Allison 1000	17–19 qt	7.4–8 qt	7–10 qt
Allison 1000 (Deep Pan)	19–20 qt	8–9 qt	8–12 qt
Allison 1500	18–20 qt	8–9 qt	7–10 qt
Allison 2000 Series	17–20 qt	10 qt	7–10 qt
Allison 2100	18–21 qt	10–11 qt	8–11 qt
Allison 2200	18–22 qt	10–11 qt	8–11 qt
Allison 2300	19–22 qt	11 qt	8–12 qt
Allison 2400	19–22 qt	10 qt	8–11 qt
Allison 2500	19–22 qt	10 qt	8–11 qt
Allison 2550	19–23 qt	10–11 qt	8–12 qt
Allison EVS (Fire/Rescue)	22–25 qt	12–14 qt	10–14 qt
Allison 3000 Series	28–30 qt	17 qt	14–17 qt
Allison 3000 MH (RV)	28–31 qt	17–18 qt	15–18 qt
Allison 3060	29–31 qt	17 qt	14–17 qt
Allison 3070	30–33 qt	17–19 qt	15–18 qt
Allison 3200	28–30 qt	17 qt	15–17 qt
Allison 3300	29–32 qt	18 qt	15–18 qt
Allison B300	29–33 qt	18–22 qt	15–22 qt
Allison S300	28–34 qt	18–21 qt	14–21 qt
Allison 4000 Series	39–45 qt	29 qt	25–29 qt
Allison 4000 MH (RV/Coach)	40–47 qt	29–33 qt	26–33 qt
Allison 4500	42–48 qt	30 qt	25–30 qt
Allison 4700	45–53 qt	32 qt	28–32 qt
Allison 4800	45–55 qt	32 qt	28–32 qt
Allison B400	40–48 qt	25–32 qt	20–32 qt
Allison S400	42–49 qt	26–33 qt	22–33 qt
Allison 5000 Series	52–60 qt	40 qt	34–40 qt
Allison 6000 Series	55–65 qt	45 qt	35–45 qt
Allison 6600	55–68 qt	45–50 qt	35–50 qt
Allison 8000 Series	70–90 qt	55–65 qt	45–55 qt
Allison 9000 Series	95–120 qt	75–85 qt	60–80 qt
Allison AT545	16–20 qt	10 qt	6–10 qt
Allison AT540	14–18 qt	10 qt	6–9 qt
Allison AT1545	16–20 qt	10 qt	6–10 qt
Allison MT643	19–24 qt	12–15 qt	10–15 qt
Allison MT653	22–26 qt	14–16 qt	11–16 qt
Allison MT654	22–27 qt	14–17 qt	11–17 qt
Allison HT740	30–36 qt	26 qt	20–26 qt
Allison HT747	34–40 qt	26–28 qt	20–28 qt
Allison HT750	36–42 qt	28–30 qt	22–30 qt
Allison VR731 (Transit Bus)	38–45 qt	24–29 qt	20–29 qt
Allison V730 (GM Transit Bus)	32–40 qt	20–25 qt	15–25 qt
Allison CLT/CRT Series (Industrial)	45–70 qt	35–50 qt	25–50 qt
Allison Off-Highway (General)	50–120 qt	40–90 qt	30–80 qt

Related Check Allison Transmission Fluid Level(Step by Step)

Best Allison-Approved Transmission Fluids

1. Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid

• Fully synthetic formulation designed specifically for Allison automatic transmissions
• Meets Allison TES-668 specification (backward compatible with TES-295)
• Excellent thermal stability for heavy-duty and high-temperature operation
• Helps extend transmission service intervals and component life
• Commonly used in trucks, buses, RVs, and commercial vehicles

2. Mobil Delvac Synthetic ATF (Allison Approved)

• High-performance synthetic automatic transmission fluid for Allison transmissions
• Approved to Allison TES-295 / TES-668 standards (depending on packaging)
• Provides strong protection against wear, oxidation, and fluid breakdown
• Ensures smooth shifting under heavy loads and demanding conditions
• Suitable for on-highway and vocational heavy-duty applications

3. CITGO Syndurance 668 Synthetic ATF

• Fully synthetic ATF approved for Allison TES-668 transmissions
• Backward compatible with older Allison TES-295 requirements
• Excellent shear stability for long-drain service intervals
• Helps reduce transmission heat and maintain consistent shift quality
• Designed for commercial trucks, buses, and severe-duty service

Related Transmission Fluid for Allison 1000(Top 5 Best Picks 2026)

What Affects Allison Fluid Capacity?

Fluid capacity can differ depending on:

1. Pan Depth

Shallow pans hold less fluid; deep pans or aftermarket pans increase capacity.

2. Filter Type

Some models use internal filters plus external spin-on filters that add extra volume.

3. Cooler Lines & Radiators

Longer or larger coolers add fluid capacity.

4. Application (Truck vs Bus vs Industrial)

Commercial buses often use larger coolers and extended pans.

5. Dry vs Wet Capacity

• Dry capacity = completely empty transmission (after overhaul).
• Drain & fill capacity = only a portion of the fluid exits during a standard service.

Related Transmission Fluid Temperature Chart(Complete Guide)

Recommended Fluid Types for Allison Transmissions

Allison recommends using TES-295 or TES-668 approved fluids for maximum protection.

TES-295 (Synthetic)

• Longest drain intervals (up to 300,000 miles in some cases)
• Best performance and heat resistance
• Examples: Transynd, Mobil Delvac Synthetic ATF

TES-668 (Newer Standard)

• Improved thermal stability
• Enhanced clutch material compatibility
• Backward compatible with TES-295

DEXRON III / HD ATF (Non-synthetic)

• Acceptable for older models like AT/MT/HT series
• Shorter change intervals

Related Automatic Transmission Fluid Color Chart(All Colors)

How Often Should You Change Allison Transmission Fluid?

Use Case	TES-295 Synthetic Interval	Conventional ATF Interval
Normal Duty	150,000–300,000 miles	25,000–50,000 miles
Severe Duty	75,000–150,000 miles	15,000–25,000 miles
Off-Highway	Hours-based	Hours-based

FAQs

How much fluid does my Allison transmission hold?

The fluid capacity depends on your specific Allison model, pan depth, and whether you’re doing a drain-and-fill or a complete dry fill.

• Allison 1000/2000 Series: 7–10 qt (drain & fill), 17–20 qt (dry).
• Allison 3000 Series: 14–17 qt (drain & fill), 28–30 qt (dry).
• Allison 4000 Series: 25–29 qt (drain & fill), 39–45 qt (dry).
• Consult your transmission tag or owner’s manual for exact configurations.

What kind of fluid does an Allison 3000 transmission take?

The Allison 3000 Series is designed to use Allison-approved TES-295 or TES-668 synthetic ATF, such as:

• Transynd (TES-295)
• Mobil Delvac Synthetic ATF
• Castrol TranSynd
• These fluids offer superior heat resistance, longer shift performance, and extended service intervals. Conventional ATF is not recommended in modern 3000 Series transmissions.

What is the capacity of the Allison 4000 transmission?

The typical fluid capacity for an Allison 4000 Series is:

• Drain & Refill: 25–29 quarts
• Dry Capacity: 39–45 quarts
• This varies depending on cooler size, pan depth, and external filter configuration. Vehicles like fire trucks and heavy vocational rigs often sit at the higher end due to larger cooling circuits.

What is the capacity of the Allison 3000 transmission?

The Allison 3000 Series generally holds:

• Drain & Refill: 14–17 quarts.
• Dry Capacity: 28–30 quarts
• Exact capacity varies by model (3000, 3060, 3070, B300, S300) and cooler line routing.

How to check Allison transmission fluid level?

Use one of the following methods depending on your model:

1. Using the Shift Selector (Most Common Method)

1. Park on level ground.
2. Bring the transmission to operating temp (160–200°F).
3. Put the transmission in Neutral and apply the parking brake.
4. Press the UP and DOWN arrows together on the Allison shift pad.
5. Wait for the display to show “oL” (oil level).
6. The screen will show “OK,” “Lo,” or “Hi” along with how many quarts you are off.

2. Using the Dipstick (Older Models)

1. Warm up the transmission.
2. Leave engine idling in Neutral.
3. Pull the dipstick, wipe it, reinsert, and pull again.
4. Fluid should be between “HOT RUN” marks.

Make sure to use only Allison-approved ATF for accurate readings and performance.

Final Thoughts

Servicing an Allison transmission is easy when you have accurate fluid capacity information. The chart above covers the most widely used models in the 1000 through 9000 series, along with AT/MT/HT units that remain popular in older trucks and buses.

Whether you’re maintaining a personal RV or managing a fleet of vocational trucks, correct fluid levels, TES-approved fluids, and timely service will keep your Allison transmission running smoothly for years.