Did something stupid: hurt driveline?
Veteran
Joined: Nov 2012
Posts: 292
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From: Chesapeake, Virginia
In one episode, they wanted to see the fasted way to slow down a car with no brakes, and one of the ideas was shifting an auto into reverse and park (two separate runs) and then trying to shift a manual into reverse. In the auto, the tranny just disengaged and the car coasted.
In the other episode, they modified a Plymouth so that the front u-joint on the driveshaft failed while driving over a pothole to see if the momentum of the car would use the driveshaft to pole vault the car.
Now, related the OP, I thought if the truck was shifted into reverse or park, the tranny disengages and goes into neutral to prevent damage? Or is that something that was introduced in later models?
Administrator
Joined: Apr 2010
Posts: 87,394
Likes: 4,213
From: Clayton MI
Actually, y'all are each thinking of a different episode.
In one episode, they wanted to see the fasted way to slow down a car with no brakes, and one of the ideas was shifting an auto into reverse and park (two separate runs) and then trying to shift a manual into reverse. In the auto, the tranny just disengaged and the car coasted.
In the other episode, they modified a Plymouth so that the front u-joint on the driveshaft failed while driving over a pothole to see if the momentum of the car would use the driveshaft to pole vault the car.
Now, related the OP, I thought if the truck was shifted into reverse or park, the tranny disengages and goes into neutral to prevent damage? Or is that something that was introduced in later models?
In one episode, they wanted to see the fasted way to slow down a car with no brakes, and one of the ideas was shifting an auto into reverse and park (two separate runs) and then trying to shift a manual into reverse. In the auto, the tranny just disengaged and the car coasted.
In the other episode, they modified a Plymouth so that the front u-joint on the driveshaft failed while driving over a pothole to see if the momentum of the car would use the driveshaft to pole vault the car.
Now, related the OP, I thought if the truck was shifted into reverse or park, the tranny disengages and goes into neutral to prevent damage? Or is that something that was introduced in later models?
Rookie
Joined: Aug 2009
Posts: 61
Likes: 0
From: New Hampshire
I have a hypothesis - Trans linkage is slightly misadjusted, and putting in Neural, rooster compb was sitting on detent ball in tranny, and nudged into reverse. Check that adjustment while you are there.
Also +1 on checking mounts and u joints.
Premature speculation, I believe.....
Also +1 on checking mounts and u joints.
Premature speculation, I believe.....
Thread Starter
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Banned Goober Smoocher
Joined: Jun 2010
Posts: 8,916
Likes: 1
Our transmission are simply slightly modified 727's, so, they do what they are told. Put it in reverse at any speed.... and it will try and engage reverse. Then it just becomes a matter of the weakest link.... that is the part that is going to break. If you have limited traction, might just have the effect of locking the rear brakes. If you have good traction, somethin's gotta give.....
I looked at the rubber mount yesterday, even tried to move the t-case up to check for movement, nothing out of the ordinary. Also tried pushing the driveshaft around and there was no weird movement.
Captain
Joined: Oct 2012
Posts: 506
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From: Eganville. On
i have done exactly as descrbed with my old ram trans lasted 100k then i sold it trans woking great
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Banned Goober Smoocher
Joined: Jun 2010
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This is very true. I don't think it had been that long since the trans was serviced or rebuilt when I bought it. Fluid was pretty clean looking and smelling. Only thing that made me take it in for service a while back was the t-case seal.
That could be why it held up so well! Others are right, time will tell. For now, just be observant and do what these trucks were meant to do... drive!
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
Captain
Joined: Oct 2012
Posts: 506
Likes: 0
From: Eganville. On
That could be why it held up so well! Others are right, time will tell. For now, just be observant and do what these trucks were meant to do... drive!
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
or just wants op to pay for a rebuild prematurly
Thread Starter
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Banned Goober Smoocher
Joined: Jun 2010
Posts: 8,916
Likes: 1
That could be why it held up so well! Others are right, time will tell. For now, just be observant and do what these trucks were meant to do... drive!
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
J/W... how do you know two people who just happened to put their automatic transmissions into reverse while cruising foreward at 45+ MPH
