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Chevy Silverado and GMC Sierra Transmission Problems

503 messages,  Last post on Nov 10, 2009 at 5:28 PM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck

#162 of 503 Re: Brand new '07 Silverado w/ transmission leak [1offroader] by mdsxs4 Oct 06, 2007 (2:50 pm)
Replying to: 1offroader (Sep 29, 2007 8:10 am) It is actually a 2006 1/2. It is the old body style 2007. The first time the transmission lost all but 1st and reverse. the second time the transmission would shift so hard that the rear end would bang. I was afraid that it would ruin the rear end. When the dealer took it apart they said that it was full of metal shavings. I drive the truck for work on the highway a average of 50,000 to 60,000 miles a year but they are all highway miles and I don't pull a trailer.
#163 of 503 You folks are making me nervous. by 07chevy1500lt2 Oct 08, 2007 (6:45 pm)
All you folks with these 2007 1500 tranny problems..tell me a liitle more about what you have. Are they 4x4's, what size motors, what kind of driving are you doing, what were the remedies, did you follow break in procedures correctly? The reason I ask is I just purchased a 2007 with the new body style, it has the 5.3, LT2 package, 4x2, HD towing. I have only owned mine for 2 days now but I must say..I LOVE MY NEW TRUCK!!! To me this new Chevy is the best thing since sliced bread. The ride is far better than ANY truck I drove to include all manufacturers except Nissan. The interior in the LT2 with Leather is far nicer to anyone else and the 5.3 has plenty of power and better fuel economy than the smaller 4.8. So please tell me a little more about your rigs and how you drive em and the reasons for the failures. Thanks Replies to this message: bumperdude (Oct 09, 2007 4:22 pm) 07chevy1500lt2 (Oct 09, 2007 6:32 pm)
#164 of 503 Re: You folks are making me nervous. [07chevy1500lt2] by bumperdude Oct 09, 2007 (4:22 pm)
Replying to: 07chevy1500lt2 (Oct 08, 2007 6:45 pm) My truck is the new body 07. 6.0 vortec max 1500 (HD tranny tow package) (4x4 not Z71, just 4x4) A/T tranny, 20" factory street wheels, LTZ 4door, w/all the bells. The tranny always had a slight fluid pump type noise(only slight) and started screwing up and went out over a weekend. It seemed to free wheel and the tranny temp was much higher than normal. Dealer said to went to pieces when they opened it. they thought something must have got left out in assy. The new one seems fine and no more fluid whine noise. 14,000 miles now and all is well. Replies to this message: 07chevy1500lt2 (Oct 09, 2007 6:32 pm)
#165 of 503 Re: You folks are making me nervous. [bumperdude] by 07chevy1500lt2 Oct 09, 2007 (6:32 pm)
Replying to: bumperdude (Oct 09, 2007 4:22 pm) Thanks for the info BD. I'm still in the break in process and fully intend to do the recommendations. Day 3 now and still no problems for me.   Thanks again.
#166 of 503 Re: 93 shift problem [fgr8frk] by fgr8frk Oct 12, 2007 (11:06 am)
Replying to: fgr8frk (Sep 27, 2007 8:21 pm) Found the problem. A guy told me to check the brake light switch and make sure it was adjusted correctly, and it wasn't. Everytime it hit a bump the pedal would bounce slightly and the switch was cancelling overdrive.
#167 of 503 More Problems 93 5.7/4l60 not shifting by fgr8frk Oct 14, 2007 (12:01 pm)
Fixed one problem, now have a bigger one.   Truck has 190,000 miles. It does not shift out of 1st unless you run it up alittle and let off the throttle and then I think it shifts straight to 3rd, not sure though, it feels like it is in between(doesn't feel like 2nd), and still pulls good. It does feel like it is shifting to overdrive at about 35-40 but not locking up. Rpm's seem to high for 3rd gear though. Reverse works and it pulls fine. Will not shift manually, and if you put shifter in 2nd it disengages like you put it in neutral. I changed fluid and filter, and 2 shift solenoids(1-2 & 2-3) first, still the same. Changed pressure silenoid and it did make it(when it does shift)shift harder. It has not set any trouble codes. Anything would be helpful, Thanks Replies to this message: bamagal1 (Nov 06, 2007 11:24 am)
#168 of 503 Transmission Oil Change Question by maxwell10 Oct 14, 2007 (4:28 pm)
Had the transmission oil changed in my 2000 oldstyle Chevy 3/4 ton at 60K. Do not know if Chevy dealer changed filter and oil or back flushed system.   Question: Is it better to drain oil and change filter or have transmission back flushed? Replies to this message: 1offroader (Oct 14, 2007 6:27 pm) maxwell10 (Oct 20, 2007 5:42 pm) 1offroader (Oct 20, 2007 7:06 pm)
#169 of 503 Re: Transmission Oil Change Question [maxwell10] by 1offroader Oct 14, 2007 (6:27 pm)
Replying to: maxwell10 (Oct 14, 2007 4:28 pm) Backflushing removes all of the old fluid. Just draining does not get rid of the several quarts that are inside the torque converter. But backflushing can be a lot more $, esp. at the dealer. I drain ATF about every 30K miles and don't worry about backflushing, or second draining, because the ATF is always pretty fresh. But, if it's been awhile, you can drain it, refill, then drive around for a week or so and drain it again. That will get rid of about 80% of the old fluid (along with a lot of the new fluid from the first draining ). It's cheaper than a backflush and you can do it yourself.   An analogy is the radiator coolant - drain, fill with water, drive around, and drain again and refill w/new coolant. This gets out all the coolant that is sitting in the engine block that doesn't come out when you just drain the radiator.   1offroader Replies to this message: maxwell10 (Oct 20, 2007 5:42 pm) 1offroader (Oct 20, 2007 7:06 pm)
#170 of 503 Re: Transmission Oil Change Question [1offroader] by maxwell10 Oct 20, 2007 (5:42 pm)
Replying to: 1offroader (Oct 14, 2007 6:27 pm) Thanks for the reply,   sounds like draining is right for me, my 4l80e transmission has a drain plug.   What about changing filter,   I had transmission oil changed at GM dealership (60K). Nothing was said about a backflush so I am sure I got a oil/filter change.   Truck now has (77K)   Do you change filter and oil every 30K? Replies to this message: 1offroader (Oct 20, 2007 7:06 pm)
#171 of 503 Re: Transmission Oil Change Question [maxwell10] by 1offroader Oct 20, 2007 (7:06 pm)
Replying to: maxwell10 (Oct 20, 2007 5:42 pm) I've done trans filter changes before but I notice that most trans "filters" aren't really filters at all, they're just coarse screens, almost like window screen size mesh. Take a look at it, if there's no junk on it leave it alone and save your $. Those kind of filters are just there to catch big chunks, not really fine particles. I can't personally say about yours, haven't seen it.   I have a 99 Trooper, it has a GM trans in it, you can't even get inside to change a filter (if it even has one), I just drain the ATF and refill. No trans probs at 70K.   1offroader

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