---
title: Transfer Flow 40 Gallon In-Bed Fuel Tank | TruckBedShop
url: https://truckbedshop.com/shop/accessories/transfer-flow-40-gallon-in-bed-auxiliary-fuel-tank/
description: Buy the Transfer Flow 40 gallon in-bed auxiliary fuel tank system for full-size diesel trucks. Extra range for work and towing.
updated: 2026-10-15
---

Transfer Flow

# Transfer Flow 40 Gallon In-Bed Auxiliary Fuel Tank System

$2,100.99

Free shipping to the US and Canada. Most orders dispatch within 2 business days.

**Compatible with**Compatible with almost any full-size diesel truck. You must give the year, make, model, bed length and fuel type, and the price may depend on the truck. Email us before ordering.

[Check fit for my truck](mailto:info@truckbedshop.com?subject=Fit%20check%3A%20Transfer%20Flow%2040%20Gallon%20In-Bed%20Auxiliary%20Fuel%20Tank%20System)

- Free shipping to the US and Canada over $1,000
- Minimum order $300 across your cart
- Guest checkout: Zelle, Apple Pay, bank transfer or crypto
- 30-day returns on unused items
- Fit help from our team: info@truckbedshop.com

## Specifications

| Capacity | 40 gallons |
| --- | --- |
| Type | In-bed auxiliary fuel tank system |
| Material | American-made 14-gauge aluminized steel |
| Fit | Almost any full-size diesel truck |
| Needed to order | Year, make, model, bed length and fuel type |

## About this product

The Transfer Flow 40 gallon in-bed system adds an auxiliary fuel tank to a full-size truck for longer range between stops. The tank is made in the USA from 14-gauge aluminized steel.

Fit and price depend on your truck, so send us your year, make, model, bed length and fuel type before you order.

## Transfer Flow 40 Gallon In-Bed Auxiliary Fuel Tank System: frequently asked questions

**How much is the Transfer Flow 40 gallon fuel tank?**

The price on this page is $2,100.99. Shipping is free over $1,000, and below that it is quoted on your invoice from your location and order weight.

**How big is the Transfer Flow in-bed tank?**

This listing is the 40 gallon in-bed auxiliary fuel tank system.

**What is the tank made of?**

Transfer Flow describes the tank as American-made 14-gauge aluminized steel.

**Will it fit my truck?**

It is made for almost any full-size diesel truck. Year, make, model, bed length and fuel type decide the exact kit.

**How do I order the Transfer Flow 40 gallon fuel tank or check fit?**

Add it to your cart, or email info@truckbedshop.com with your year, make, model and bed length and we confirm before you pay. Orders start at $300.

## Not sure this fits your truck?

Send your truck make, model, year and bed length and we confirm the fit before you order.

[Ask a fit question](mailto:info@truckbedshop.com?subject=Fit%20check%3A%20Transfer%20Flow%2040%20Gallon%20In-Bed%20Auxiliary%20Fuel%20Tank%20System)