YeeeeHawwww
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Joined: Mar 2003
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YeeeeHawwww
Isn't the whine from the turbo when the tranny downshifts during braking the most incredible sound?!? I turn the CD off and open the windows just to hear it! {Please forgive a diesel newby"s enthusiasm for his "real" truck} 900 trouble-free miles so far, and still haven't been able to put enough wieght-logs-in the back to tell.
Post Fiend
Joined: Aug 2002
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From: Denton,TX
YeeeeHawwww
Originally posted by mjstef
Anyone Know if the 6 speeds hold back when downshifted???
Anyone Know if the 6 speeds hold back when downshifted???
Senior User
Joined: Jul 2001
Posts: 126
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From: Montana
YeeeeHawwww
Originally posted by johnsdiesel
Of course it does. All the new 5 speed auto does is imitate how you would use engine braking in a manual transmission.
Of course it does. All the new 5 speed auto does is imitate how you would use engine braking in a manual transmission.
Post Fiend
Joined: Aug 2002
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From: Denton,TX
YeeeeHawwww
Originally posted by mjstef
I didn't explain myself. I have heard that the new VVT acted somewhat like an exhaust brake, electronically manipulating the vanes to create backpreassure. This could be achieved in an auto by using the same signal the pcm gives the trans to downshift. I wondered if it really worked that way or not?
I didn't explain myself. I have heard that the new VVT acted somewhat like an exhaust brake, electronically manipulating the vanes to create backpreassure. This could be achieved in an auto by using the same signal the pcm gives the trans to downshift. I wondered if it really worked that way or not?
Senior User
Joined: Jul 2001
Posts: 126
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From: Montana
YeeeeHawwww
The Exhaust brake on a 7.3 is a non-issue. I know Ford dealers that install them. My 2000 has 100,000 miles on the clock, 60+000 towing with an exhaust brake and it has never been in the shop for anything. My 95 had 170,000 on it when i sold it. I do wonder about the 6.0 and an exhaust brake and the more complicated turbo though.
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Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
YeeeeHawwww
mjstef, an exhaust brake IS an issue. Remember, Ford Motor Company holds your warranty, not an individual dealer. Here's a notice by Ford regarding the issue:
SSM # 10389 states: "Some aftermarket products may cause severe engine and/or transmission damage. There are various manufacturers offering devices to increase turbocharger boost, exhaust brakes to increase stopping/hauling capacity or other such devices to increase the power/torque of the 7.3L DIT. Severe powertrain damage may result from use of these aftermarket products, which will not be covered by the Ford warranty."
I'm sure the same applies to the 6.0.
SSM # 10389 states: "Some aftermarket products may cause severe engine and/or transmission damage. There are various manufacturers offering devices to increase turbocharger boost, exhaust brakes to increase stopping/hauling capacity or other such devices to increase the power/torque of the 7.3L DIT. Severe powertrain damage may result from use of these aftermarket products, which will not be covered by the Ford warranty."
I'm sure the same applies to the 6.0.
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Senior User
Joined: Jul 2001
Posts: 126
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From: Montana
YeeeeHawwww
"IF" An aftermarket product causes failure. Not "JUST" because you have it on. Like I said 270,000 miles between 2 trucks without a hitch. Chip, Exhaust brake,Ram-air ect and my dealer has no problems with the products. BUT,,,, IF i run the crap out of the truck with the chip and burn up the turbo, NO Ford will not pay.
Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
YeeeeHawwww
Interpret it how you want, but it's all there in black and white. Some dealers might not have a problem with it until there is a warranty concern simply because they are selling you the products. Certain parts of the engine are not made to handle the backpressure that an exhaust brake gives and can fail (I think lifters and a few other things). Call Ford and ask them what there policy is and they'll quote what I just posted.
Senior User
Joined: Jul 2001
Posts: 126
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From: Montana
YeeeeHawwww
"Severe powertrain damage may result from use of these aftermarket products, which will not be covered by the Ford warranty."
The Ford EBV valve is what i use as an Exhaust brake. There is no more strain engaging this as a brake than when the PCM engages it at -20 degrees to warm the engine up. Mark wildman From Navistar told me at our rally 2 years ago that the EBV would not cause damage engaged until well after the redline of the engine.
The Ford EBV valve is what i use as an Exhaust brake. There is no more strain engaging this as a brake than when the PCM engages it at -20 degrees to warm the engine up. Mark wildman From Navistar told me at our rally 2 years ago that the EBV would not cause damage engaged until well after the redline of the engine.
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
YeeeeHawwww
Originally posted by mjstef
"Severe powertrain damage may result from use of these aftermarket products, which will not be covered by the Ford warranty."
The Ford EBV valve is what i use as an Exhaust brake. There is no more strain engaging this as a brake than when the PCM engages it at -20 degrees to warm the engine up. Mark wildman From Navistar told me at our rally 2 years ago that the EBV would not cause damage engaged until well after the redline of the engine.
"Severe powertrain damage may result from use of these aftermarket products, which will not be covered by the Ford warranty."
The Ford EBV valve is what i use as an Exhaust brake. There is no more strain engaging this as a brake than when the PCM engages it at -20 degrees to warm the engine up. Mark wildman From Navistar told me at our rally 2 years ago that the EBV would not cause damage engaged until well after the redline of the engine.
Senior User
Joined: Jul 2001
Posts: 126
Likes: 3
From: Montana
YeeeeHawwww
If Ford made the braking better on these trucks no-one would be putting these things on. Until then they will. It feels real good going down an 8-10% grade at 40MPH with the Ex brake on not having to use the service brakes at all. On the other hand the same hill at 25mph without an ex brake gives me a real bad feeling! If you pull gross weight across colorado and Montana you will know what i mean.