Question About AOD
More Turbo
Joined: Oct 2020
Posts: 529
Likes: 54
From: Houston
It almost felt like a bad CVT.
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4wd Low
Joined: Apr 2023
Posts: 10
Likes: 1
Off hand, I'd say not.
The TV cable regulates pressure. Loose cable= lower pressure and causes clutches to slip which causes heat which causes more slip, more wear. A downward spiral until the vehicle won't move. If the rumble is indeed coming from the transmission I'd suspect something other than clutch/steel wear. The pressure also dictates shift timing which you do not complain about.
AS mentioned, since everything seems to work okay it would be hard to guess what the problem could be. Something like center support retaining ring broken comes to mind.
A simple check for TV cable: Move the throttle linkage at the carb and note that the TV cable has no slack. Goldilocks cable needs to be just right. Not loose, not tight. The cable should pull the transmission lever with any movement of the throttle.
The TV cable regulates pressure. Loose cable= lower pressure and causes clutches to slip which causes heat which causes more slip, more wear. A downward spiral until the vehicle won't move. If the rumble is indeed coming from the transmission I'd suspect something other than clutch/steel wear. The pressure also dictates shift timing which you do not complain about.
AS mentioned, since everything seems to work okay it would be hard to guess what the problem could be. Something like center support retaining ring broken comes to mind.
A simple check for TV cable: Move the throttle linkage at the carb and note that the TV cable has no slack. Goldilocks cable needs to be just right. Not loose, not tight. The cable should pull the transmission lever with any movement of the throttle.
Great information thank you very much! I knoww what I'll be doing after work tomorrow.
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4wd Low
Joined: Apr 2023
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I have had the cable pop off the carb a couple times (old grease on a cold days overpowered the return spring). Shifts from first to second are so soft, it feels like it is skipping second altogether. Over 45/50 it is almost like third and fourth are both pulling at the same time.
It almost felt like a bad CVT.
It almost felt like a bad CVT.
That's very interesting around 55 it almost feels like the drivetrain is fighting itself. If I lift off the pedal that feeling goes away and i feel brief acceleration but due to lifting it doesn't last long. I wonder if 3rd and 4th are fighting. Some more great information thank you very much!
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Joined: Jan 2001
Posts: 56,997
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From: Virginia
That's very interesting around 55 it almost feels like the drivetrain is fighting itself. If I lift off the pedal that feeling goes away and i feel brief acceleration but due to lifting it doesn't last long. I wonder if 3rd and 4th are fighting. Some more great information thank you very much!
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4wd Low
Joined: Apr 2023
Posts: 10
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I definitely haven't ruled that out, it seemed odd that it doesn't do it in other gears under load around 1500 rpm. I am buying the components I need to give it a tune up and reading in how to setup the single barrel carter best. My 91 with a 4.9l definitely has more power than thus truck but, the 91 is EFI and I'm not sure how drastic that change was for the 300.
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