Ford's position on adding a ground from the body to the transmission - Ford Powerstroke Diesel Forum
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post #1 of 55 Old 11-06-2019, 09:24 AM Thread Starter
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Ford's position on adding a ground from the body to the transmission

I have seen this come up a few times. Thought I would confirm Ford's position on it.

Ford states:
Do not ground the body to the transmission or transmission crossmember.

https://madocumentupload.marketingas...e7606&v5=False

Mark
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Last edited by bismic; 11-06-2019 at 10:29 AM.
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post #2 of 55 Old 11-06-2019, 09:50 AM
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Imo, your statement is taking what the document says out of context.

Ford does not want you to ground the aftermarket body, like an ambulance body, to the trans. This does not mean that you cannot run a ground strap from the engine to the transmission.

Regardless, the engine block is grounded to the frame, and the trans is bolted to the block. All you are doing is improving the ground path by providing a wire instead of bolts.

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post #3 of 55 Old 11-06-2019, 10:25 AM
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Quote:
Originally Posted by PrecisionEngine View Post
Imo, your statement is taking what the document says out of context.

Ford does not want you to ground the aftermarket body, like an ambulance body, to the trans. This does not mean that you cannot run a ground strap from the engine to the transmission.

Regardless, the engine block is grounded to the frame, and the trans is bolted to the block. All you are doing is improving the ground path by providing a wire instead of bolts.
https://fordbbas.com/home

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So says the internet... ...and so it shall be.
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OK, thanks for the info. To show my ignorance, what is the problem with 3 nipples...
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post #4 of 55 Old 11-06-2019, 10:27 AM Thread Starter
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Quote:
Originally Posted by PrecisionEngine View Post
Imo, your statement is taking what the document says out of context.

Ford does not want you to ground the aftermarket body, like an ambulance body, to the trans. This does not mean that you cannot run a ground strap from the engine to the transmission.

Regardless, the engine block is grounded to the frame, and the trans is bolted to the block. All you are doing is improving the ground path by providing a wire instead of bolts.

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Edit (again) - since this is a body builders document and a guide to interfacing w/ the Ford electrical system, I see your point regarding the document.

I still think there is a common theme that improving the ground circuit from the body or frame to the transmission is not necessary or desirable (and I have seen it recommended several times). No electricity is intended to flow through the transmission in the first place.

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Last edited by bismic; 11-07-2019 at 05:48 PM.
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post #5 of 55 Old 11-06-2019, 10:33 AM
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Quote:
Originally Posted by bismic View Post
Their statement was simply "don't ground the body to the transmission". They didn't mention an "aftermarket body".

I posted the content as they wrote it.
The document is intended for aftermarket body installers. You cant read stuff out of context.

In addition the document does not say I cannot ground the transmission to the frame or the engine.

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post #6 of 55 Old 11-06-2019, 10:48 AM Thread Starter
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I see your point on the document's intent - I edited the previous post earlier. The document is entitled General Electrical Practices, but it is included in the Body Builders Advisory Service.

Out of original context or not ..... Since they are saying that you shouldn't ground a second body unit to the transmission, (IMO) they are saying that they want a better grounding location/path. Clearly they don't say that improving the grounding to the existing transmission is a recommended option. I just don't think that (transmission to frame) grounding path is helpful (as some suggest), and certainly not necessary.

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Last edited by bismic; 11-07-2019 at 05:50 PM.
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post #7 of 55 Old 11-06-2019, 10:48 AM
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Quote:
Originally Posted by PrecisionEngine View Post
You cant read stuff out of context.

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post #8 of 55 Old 11-06-2019, 10:56 AM Thread Starter
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lol - Not the first time to read more into something than intended!
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post #9 of 55 Old 11-06-2019, 11:55 AM
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At the end of the day, you do not have to add grounds to YOUR trans.

But most 6.0s on the road have corroded and failing grounds, they could use all the help they can get.

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Quote:
Originally Posted by djmaguire View Post
So says the internet... ...and so it shall be.
Quote:
Originally Posted by G8orFord View Post
OK, thanks for the info. To show my ignorance, what is the problem with 3 nipples...
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post #10 of 55 Old 11-06-2019, 12:09 PM
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Not only is the trans grounded to the frame through the motor, but it is also grounded through the transfer case, driveshafts, rear axle, etc...

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