sluggish when first started
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Junior User
Joined: Jan 2006
Posts: 90
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sluggish when first started
I have been recently having an issue with my truck that i believed to be the parking brake sticking...but i believe i have ruled that out.
When the truck has sat for a while, just a matter of a few hours really, and i put it in drive, i literally have to put the accelerator on the ground to get going. At which point the truck will rev up then slowly begin to move.
I noticed the other day, that i dont have this problem in reverse. So instantly the idea of tranny issues popped into my head.
Any ideas?
When the truck has sat for a while, just a matter of a few hours really, and i put it in drive, i literally have to put the accelerator on the ground to get going. At which point the truck will rev up then slowly begin to move.
I noticed the other day, that i dont have this problem in reverse. So instantly the idea of tranny issues popped into my head.
Any ideas?
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Junior User
Joined: Jan 2006
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that sounds logical, but i believe it still shifts 2 more times. It doesn't shift into 2nd easily on a cold morning though. Il have to get it up to about 20 or so and then let off the gas for her to shift.
Elder User
Joined: Feb 2007
Posts: 549
Likes: 1
From: Mississippi
just a thought, but when is the last time a maintenance was done on the tranny such as filter screen cleaning and replacing fluid? not real up on diesel auto trannies, but the c-4 i had in a car had problems shifting when stuff got nasty. also had a bad modulator that had to be replaced. i would have to wind engine up about 2,000 beyond shift point and let off for it to shift up gears. same as you, no problems with reverse. not sure if the c-6 has oneof those or not, but if so, that may be something to look at.
speedrdr
speedrdr
Posting Guru
Joined: Sep 2007
Posts: 2,207
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From: Las vegas
sounds like the tranny doesn't have enough main line presure when cold, the revers clutch gets more presure than the forward clutches. check your fluid and let us know what color it is and what it smells like.
Posting Guru
Joined: Mar 2005
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From: KY
I have seen torque converters do this very thing. Rare in my experience but they can does this. I ran into a Chevy van with a 6.2 in it several years ago that a guy brought me. It was the converter. I had a old auto trans guy put me on to the coverter. He explained to me what happens inside that causes it.
Anybody else remember the engine brakes that Cat used to put on their engines that used engine oil. The Brake Saver. It has that effect.
Anybody else remember the engine brakes that Cat used to put on their engines that used engine oil. The Brake Saver. It has that effect.
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Posting Guru
Joined: Jul 2004
Posts: 1,627
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From: West Valley Utah
It was a retarder that Cat used/uses in place of a jake brake. They worked off oil pressure. Either one was an option for the Cats. The retarder held better than jakes as long as the oil didn't get to hot. You had to keep an eye on the retarder temp and dump the oil when it got hot.
Overall, on a long downgrade, you could raise the total oil temp 20-30 degrees. Retarder was heavier than jakes, about 800lbs if I remember right.
Overall, on a long downgrade, you could raise the total oil temp 20-30 degrees. Retarder was heavier than jakes, about 800lbs if I remember right.
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Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
There are several adjustments......... linkage, VRV setting, and PNP switch also a band tightening any or all may be contributing to the problem.
WAG..... I have heard of the band being too loose, due to the interconnect piece between the adjuster and the band falling out ....... IIRC that would be the symptoms you are getting. I would advise to drop the pan again and see whats in the pan.
WAG..... I have heard of the band being too loose, due to the interconnect piece between the adjuster and the band falling out ....... IIRC that would be the symptoms you are getting. I would advise to drop the pan again and see whats in the pan.
Junior User
Joined: Dec 2007
Posts: 82
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From: WA
"I have seen torque converters do this very thing. Rare in my experience but they can does this. I ran into a Chevy van with a 6.2 in it several years ago that a guy brought me. It was the converter. I had a old auto trans guy put me on to the coverter. He explained to me what happens inside that causes it."
Posting Guru
Joined: Mar 2005
Posts: 1,701
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From: KY
The van that had the bad converter had nothing in the oil that was out of the ordinary and fluid level was fine. Rare failure. It would shift through all the gears and would run out ok out on the road but when you stopped and took off it was like you were tied to a train. You could floor it and it would slowly take off and the motor was lugging hard.