A deep pan on an Allison 1000 isn't just for looks. More fluid capacity means cooler operation under tow load and longer service intervals.
Benefits of deep pan
- More fluid (3-5 extra quarts)
- Cooler operation (more thermal mass)
- Magnet often included (better debris capture)
- Some include drain plug (easier service)
- Read our deep transmission pan
Capacity comparison
Stock pan:
- Service capacity ~6-7 quarts
- Standard for light use
Deep pan:
- Service capacity 9-12 quarts
- 3-5 quart additional thermal mass
- Significant temp benefit under tow
Temperature benefit
- Stock pan: trans hits 230°F+ heavy tow grade
- Deep pan: trans stays 200-215°F same conditions
- 15-25°F lower = longer fluid life
- Combined with aux cooler: dramatic improvement
- Read our transmission temperature monitoring
Common deep pan brands
- Mag-Hytec (premium, cast aluminum)
- PPE (HD tow specific)
- BD Diesel (Allison-focused)
- Aftermarket cast aluminum (various)
Cost
- Premium cast deep pan: $250-$450
- Standard aftermarket deep: $150-$300
- Installation: 2-3 hours DIY
- Plus extra fluid for capacity increase
- Read our Allison 1000 fluid capacity
Install considerations
- Check filter extension needed
- Verify clearance to chassis
- Use specified gasket or sealant
- Read our transmission seal vs gasket
Pair with these upgrades
- Aux cooler for max heat reduction
- Read our transmission cooler installation
- Thermostatic bypass
- Read our transmission cooler thermostat
- Trans temp gauge
When NOT worth it
- Stock truck, no tow
- Warm climate, normal driving
- Stock pan adequate
Service intervals with deep pan
- Same service intervals work
- But you have more thermal margin
- Tow use still favors 30,000 mile service
- Read our how to flush transmission fluid
Need Allison deep pan or service parts? Shop our Allison catalog. Deep pans, filters, fluid. Free shipping over $70.
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