1st to 2nd shifts funny

Skip Talker · April 9, 2012

2010 5.3 with 6 speed. I recently got a flush and filter change and it has 103000 miles on it. When it shifts from 1st to 2nd going slow it does a studder. If I'm acelerating or going up hill putting any load at all it shifts normal. In stop and go traffic its anoying as hell. I've started to just keep in in 1st when traffic is stalled. It's out of warranty. Any one reconize this problem?

vkjohnson · April 9, 2012

holy cow 103,000 in 2 years???

Skip Talker · April 9, 2012

Well, in May it will be 2 years. Yeah my carbon footprint is nothing to brag about. Just hope it lasts until it is paid for. My 04 had 280,000 in 6 years. Would have kept it but it was just a matter of time before something went wrong with it.

gmtech4 · April 10, 2012

you need a duramax with an Allison ,,,,,as for the tranny ,another flush victim or coincedence,,,,,

i say the later ,,,,,have a tranny tech diagnose it ,internet cant help unless the oil is dark,,,,then you have problems,

IDK the 6speeds at all to help ,maybe a current tech can give his 2 cents

never flush a tranny,,the service recomendations from the General never says to do it...(im not saying that caused this symtom)

Skip Talker · April 11, 2012

The duramax are supposed to out last the gas counterparts, but in my industry I see a lot of them with problems. A lot of has to do with the way they are driven I suppose. The fleet trucks are beat to death but even a couple of the owners that take care of them are always telling me of a problem. At a 100K and this is my first problem, and turns out to be user induced. Though I did take a duramax that had all those little HP goodies added and was surprised how hard it pulled. Though it did ride a lot rougher and cost way more than my gas burner.

Oh and after I got the dipstick tube replace I was able to check the level. It's amazing what a little ATF will do....

Spark plugs are next I guess, but that would be another topic.

BlackZ71Silverado · April 12, 2012

Did you fix the shift issue when you added fluid?

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Skip Talker · April 13, 2012

Yes everything shift normal. Was a quart low. I would have thought if the fluid was low it would act up at higher speeds not at low speeds. But I guess that's why I'm not a mechanic... After the ATF was added 1-2 shifts fine at any speed.

jdelrizzle · April 13, 2012

How do you not know its a quart low.

txab · April 13, 2012

How do you not know its a quart low.

IIRC, he had another thread where his dipstick tube was broken or something like that

Skip Talker · April 14, 2012

What he said. I never claimed to be smart.

jdelrizzle · April 14, 2012

What he said. I never claimed to be smart.

Oh, That was you, the broken dipstick, I didn't mean it like that, I'm sure plenty of people think I'm an idiot after reading my posts,.lol

Skip Talker · April 14, 2012

No problem. I didn't mention that when I tried to hold the broken tube in place in place with one hand and pull out the dip stick with the other, I didn't want to do it with the engine running. Fluid level was OK then. Then I had my Homer moment. All good now though.