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Old 04-29-2019, 10:12 PM
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1994 Chevy 1500 - Doesn't Move Forward On Its Own When in Drive

Hi All,


Quick question: when I put the transmission into drive and take my foot off the brake pedal, the truck never moves forward under its own power. It takes a bit of pressing the accelerator pedal to get it going, but I assume that's just because it is a big heavy vehicle.


Is this pretty normal? Or am I wrong in thinking that the engine is lacking power somewhere?


Thanks in advance!

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Old 04-29-2019, 11:14 PM
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It means you have the proper stall convertor. the truck should not move until you give it a bit of gas...

Sam
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Old 04-30-2019, 06:05 AM
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I would think the brakes are tight.
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Old 04-30-2019, 07:47 AM
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It could mean your transmission is slipping. Does it seem to go a little easier as it warms up? Or cycle it from D to R back and forth a few times and see if it *grabs* better. My 2000 3500 van with only 100,000 miles on it started to slip on cold days if it sat more than a few days. I added a bottle of snake oil (trans X (?) blue bottle) and the problem went away, for now. I know this means it needs seals, but I'll see how long it keeps going. If yours is slipping, try the snake oil ASAP or you will wear out the clutches, then a rebuild is needed now rather than later.

On a completely different tangent, the fan clutch in my van grabs like heck when first started and it sounds like you are really revving the engine when you just touch the throttle. That too goes away in a minute or two of driving. Been like that from new.

Then again, it could be just like Sam said, normal. Mine is on the loose side but on a flat road it will move forward a little at least without touching the throttle.
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Old 04-30-2019, 02:31 PM
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Does the trans seem to operate normally other than that?......Shift properly etc?

Maybe your idle is just a bit lower than you are used to.
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Old 04-30-2019, 07:18 PM
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Quote:
Originally Posted by OneMoreTime View Post
It means you have the proper stall convertor. the truck should not move until you give it a bit of gas...

Sam
Hey Sam ,

Interesting, learned something new today. Thanks!




Quote:
Originally Posted by 123pugsy View Post
I would think the brakes are tight.
Hey Pugsy, long time no talk! How have you been? Is your ride finally done?

I don't think its the brakes, but I'll check them out.




Quote:
Originally Posted by 55 Tony View Post
It could mean your transmission is slipping. Does it seem to go a little easier as it warms up? Or cycle it from D to R back and forth a few times and see if it *grabs* better. My 2000 3500 van with only 100,000 miles on it started to slip on cold days if it sat more than a few days. I added a bottle of snake oil (trans X (?) blue bottle) and the problem went away, for now. I know this means it needs seals, but I'll see how long it keeps going. If yours is slipping, try the snake oil ASAP or you will wear out the clutches, then a rebuild is needed now rather than later.

On a completely different tangent, the fan clutch in my van grabs like heck when first started and it sounds like you are really revving the engine when you just touch the throttle. That too goes away in a minute or two of driving. Been like that from new.

Then again, it could be just like Sam said, normal. Mine is on the loose side but on a flat road it will move forward a little at least without touching the throttle.
Hey Tony,

I think it does "run better" once warmed up. But I hardly ever drive it so I never notice. Plus, I have a habit of letting it warm for a bit before driving off. On the next drive, I'll pay attention.

I don't think kine has a fan clutch.




Quote:
Originally Posted by poncho62 View Post
Does the trans seem to operate normally other than that?......Shift properly etc?

Maybe your idle is just a bit lower than you are used to.
Hey Poncho, Hope all's well!

The transmission has been having issues shifting into and staying in 4th (more info here and here). Otherwise it seems to be fine and shifts rather smoothly. I just did a full tune up, but haven't had a chance to run it on the freeway to see it made a difference.
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Old 08-06-2019, 01:08 PM
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Just wanted to post a quick update.

The truck was recently sold, and the new owner took it to a mechanic shop where they discovered that the first gear was not functioning due to a bad solenoid.
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Old 08-07-2019, 09:22 AM
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Thanks for that up date. It's good to know.


454 RATTLER
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Old 08-07-2019, 01:29 PM
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I had a work van of that vintage that lost either 1st or 2nd and Overdrive. The dealer found no solenoid signal coming from the computer and installed a new one, which burnt out right away because the solenoid was shorted! Had to wait again for a second computer.
That dealer service center sucked. I had the van to them 5 or so times for a vibration in the rear, more so when braking. First turning the drum, later replacing the drum, then I told them to replace the axle and get it over with. It took a couple more trips there to get a new axle and all was fine. They said the runout on the axle was within GM spec but changed it anyway. I had been giving them good ratings to the GM questionnaires, but after that I let them have it. I don't recall what I went there for again but they were all calling me Sir. LOL
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