What are the key differences between the 351M and 400 engines in Ford trucks from 1980 to 1986?
This Q&A session is powered by Bullnose Bill, Bullnose Garage’s advanced AI mechanic.
Have your own question? Ask Bill!
Great question! The 351M and the 400 are both part of Ford’s "M" family of engines, and they share quite a bit in common, but there are important differences that can affect your classic Bullnose truck.
Engine Size and Design:
- 351M (Modified): This engine displaces 351 cubic inches and is often found in later model Fords. It’s known for its torque and was designed for better low-end performance.
- 400: This engine has a larger displacement of 400 cubic inches, which gives it even more torque and power. It was designed for heavier-duty applications, making it a popular choice for trucks and larger vehicles.
Components:
- Both engines share many components, such as the block design and certain internals, but the 400 typically has a larger crankshaft and a different bore and stroke configuration, which contributes to its higher displacement.
Performance:
- The 400 engine generally provides more horsepower and torque due to its larger size, making it a preferred choice if you’re looking for extra power for towing or hauling.
- The 351M, while slightly less powerful, is still a solid performer and can be a great option if you want a balance of efficiency and capability.
Applications:
- The 351M was often used in lighter Ford trucks and vans, while the 400 was more commonly found in heavier vehicles like larger trucks and certain motorhomes.
A lot of Bullnose enthusiasts enjoy swapping between these engines for different performance needs. If you’re considering an upgrade or a swap in your Bullnose, think about what you’ll be using the truck for!
For more detailed insights, the Bullnose Garage YouTube channel has some great content on engine swaps and performance upgrades that you might find helpful. Just remember, every truck is unique, so tailor your engine choice to fit your specific needs!
If you have any more questions, feel free to ask!
How can I identify the transfer case in my Ford truck?
Identifying the transfer case in your Bullnose Ford can be a bit tricky, but I’ve got you covered! Here’s a straightforward way to determine which transfer case you have:
Step-by-Step Guide to Identify Your Transfer Case:
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Check Your Owner’s Manual: This is your best starting point. The manual typically includes specifications for the drivetrain, including the transfer case model.
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Look for Identification Tags: Most transfer cases have a metal tag attached to them that includes the model number and other specifications. You’ll usually find this tag on one of the mounting bolts. Clean off any dirt or grime to make it easier to read.
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Physical Inspection: If the tag is missing or unreadable, you can look at the physical characteristics of the transfer case:
- Shape and Size: Common transfer cases for Bullnose models include the NP205 (known for its robustness) and the Borg-Warner 1356. The NP205 is a bit larger and has a more square appearance, while the BW1356 is smaller and more rounded.
- Output Shaft Location: The output shaft location can also help. The NP205 typically has a rear output that is centered, while the BW1356 has a side-mounted output.
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Look at the Drive Configuration: Check the number of bolts on the transfer case and the configuration of the driveshafts. Also, note if your truck is two-wheel drive or four-wheel drive, as this will narrow it down.
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VIN Decoding: Your truck’s Vehicle Identification Number (VIN) can provide insight into the original drivetrain setup. You can use online VIN decoders or refer to forums like the Bullnose Ford subreddit for help.
Online Resources
You may also want to check out forums and communities like the F150 Forum or the Bullnose Ford subreddit, where fellow enthusiasts can help you pinpoint your transfer case based on your truck’s specifics.
Identifying your transfer case is crucial, especially if you’re considering upgrades or repairs. If you have any more questions or need further assistance, feel free to ask!
Disclaimer: The preceding text was generated by Bullnose Bill, an AI. It is possible that the information provided is not accurate. Always double-check advice and consult multiple sources before undertaking any maintenance or repair tasks. For real hands-on information, you can always visit Bullnose Garage on YouTube or check in with the BullnoseFord SubReddit.
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