Last post on May 23, 2013 at 1:03 PM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck
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#1145 of 1489 My 2001 1500 Silverado w/4.8 auto. stalls when shifting into reverse
Jan 01, 2012 (5:11 pm)
Almost everytime I shift from forward to reverse the engine stalls. Any ideas? Also when I try to back up my utility trailer loaded w/1000lbs, up a slope, the truck doesn't move. I step on the gas pedal,but nothing happens. The motor doesn't rev and the truck won't move. If I can get a little momentum and about 1500 rpm's then she'll move. what do ya think? Also, when I'm stopped in gear the truck sounds like a diesel till I put into neutral. I don't think the engine is bad, it idles with 40lbs oil pressure. Could it be a bad torque converter? I had the truck over to a local chevy dealer to diagnose it and after an hour later, they told me I needed a new trans. because it wasn't shifting right. This truck runs great and shifts perfect except for the few areas I just described. Any ideas?
#1146 of 1489 Re: My 2001 1500 Silverado w/4.8 auto. stalls when shifting into reverse [manyafix]
Jan 01, 2012 (5:35 pm)
It sounds like you need a new transmission. In this case, dealer is correct.
#1147 of 1489 My 2001 chevy silverado stalls when shifting into reverse
Jan 02, 2012 (6:28 am)
this truck drives and shifts with no other issues. why would the trans be bad? could this be a torque converter problem?
#1148 of 1489 Re: My 2001 chevy silverado stalls when shifting into reverse [manyafix]
Jan 02, 2012 (9:37 am)
Yes, it could be a torque converter. But it would be nonsense to change out the converter and not rebuild the rest of the transmission.
You need a rebuild or different transmission.
#1149 of 1489 My 2001 chevy silverado stall when shifting into reverse
Jan 02, 2012 (5:32 pm)
Thanks for your opinion, the previous owner did replace the trans but I suspect he didn't change the converter.
#1150 of 1489 Re: My 2001 chevy silverado stall when shifting into reverse [manyafix]
Jan 02, 2012 (6:16 pm)
That's a half-way repair and proves my point. To go in to a tranny and not rebuild is silly.
Best of luck whatever you decide.
#1151 of 1489 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [galbers2010]
Jan 04, 2012 (11:18 pm)
I have an 07, but the new body style. I had the clunk problem and it was a bad solenoid in the transmission. Was replaced twice... not sure if the same one though. But I've had work performed on the tranny 4 times already.
#1152 of 1489 Re: Any problems with transmission on the 4.8 4 speed? [chuck1]
Jan 05, 2012 (10:34 pm)
Thanks! Chuck1 and Sara
It is or was a little overwhelming when I came across this while researching the truck. I was able to use the extended test drive on a couple of vehicles. 125m worth Per truck! Being a lifeless geek I decided to use the time to examine the reported problems myself..
1) I was able to trigger the reported hesitation on two occasions. It would appear to be triggered by a combination of throttle position and velocity. I believe the situation occurs when the engine is in the upper gear ranges at lower rpm and mph (lugging) when the throttle is depressed… IE trying to enter the freeway. ( acceleration traveling up or down the ramp followed by slowing or pause in acceleration to mesh with traffic) My experience, I noticed the truck in 4v mode and likely 5-6th gear at 40 to 45, I depressed the accelerator (1/2 to 2/3 never to the floor just enough to force down shift) and noted a short pause….. keep in mind I was trying to throw the software a curve!!!
+++(Note) I noticed that the read outs don’t always concur… v4 is shown and mpg dips into the single digit range, how is the data provided to the display??? Real time? if so could the problem be communication on the bus? Is there and interrupt that is not getting serviced?
2) The roads I used had fairly drastic changes in elevation. The mileage appears to take a big hit with any sort of hill climb, flat roads using the accelerator I found 17-22mpg, flat roads using the cruise control I found 17-26mpg. Hill climbs with the accelerator 3-10mpg Hill climbs with the cruise control 3-13mpg .
I feel for you guys been there myself with Toyota…. You spend your hard earned cash and have nothing to show for it and to top it off no one appears to care. They send you to arbitration where you sit across the table from Toyota executives who decide if they want your truck…
It would be interesting to compile a list of the vehicles with the problem and compare. What are the models, what options, average air temps, road conditions, Speed, manufacturing date, etc. Find the commonalties.
Anyhow I m still on the fence……
#1153 of 1489 Re: Any problems with transmission on the 4.8 4 speed? [asho]
Jan 05, 2012 (11:48 pm)
If you combine Chevy and GMC pickup truck sales for 2011 they come pretty close to Ford. While I respect your taking time for the test drive, obviously, based on the numbers sold and the number of posters (last count 15ish) who say they have problems, most people are not finding a severe problem that keeps them up at night.
Congrats on GM for selling large numbers against new redesigned Ford F150!
P.S.-I just returned from a trip after Christmas from Salt Lake City NV to Southern California. I make this trip often, and I decided to let the AFM "do it's thing" and keep the cruise control set to 70mph. Consequently, the truck achieved 21.2 mpg between Mesquite NV and the Inland Empire portion of Southern California where I live. That was very impressive. (2011 Silverado Crew Cab w/5.3).
#1154 of 1489 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [shawn2e]
Jan 07, 2012 (9:39 am)
I just wanted to make sure that you are not experiencing any current concerns? I would be happy to assist to the best of my abilities if you were.
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