Guys,

Today my transmission was acting kind of funny. To set the stage the only mods are a magnaflow catback and a MIT intake tube (paper filter). I am running the stock tune and my truck has 13,000 miles. I don't beat on the truck that often and there are only 8 runs down the 1/4 mile.

Anyway, I was almost to work (10 miles on back roads) when I got stuck at a red light for a few minutes. Then, when I went to accelerate from the light it seemed like my transmission was slipping for a few seconds (until ~15 mph) and then grabbed. It has acted normal ever since.

I remember reading about this same thing on a few boards awhile ago and it seem that a lot of people had the same problem, every once and a while the trans would slip like that. Has this happened to any of you and what did you do about it (if anything at all)?

Jeff

 

My trans is acting the same way with ZERO mods on my truck, I'm looking for info as well. ttt Anyone else?

Mine does it in other gears sometimes too, like going from a cruise to a light-moderate acceleration.

 

My 99 Sierra did it a few times when it was fairly new with no mods, but it never happened again. I haven't had any probs with my 04

 

Yeah, this has happened a number of times on my '00 Sierra. My recollection of the discussions on this seem to indicate 1 of 2 conditions. First, it's possible that the valve-body needs to be repaired or replaced due to excessive wear or possibly it's just that the transmission didn't or couldn't shift down properly to 1st when you stop. If you aren't abusive in your driving habits, it's probably the second issue. I think there may even be a service bulletin and a software update to fix it.

Anyway, that's what I seem to remember.

 

My truck did the exact same thing this morning. It has 35,986 miles on it. Are there any fixes for this?

 

take to the dealer before your warranty runs out!!

 

Mt truck did the same thing when it was stock. I think it was trying to take off in 2nd and then it woukd switch to 1st. It only happened every once in a while. I think it quit doing that after I got the trans tuned.

 

I had a similar issue. SOmetimes when I would ocme to a stop, the trans would stay in 2nd when I hit the gas. Motor reved a little then slammed down to first. It did it randomly (few times every 30K) until I had FLT rebuild my trans. Hasn't happened in the 10K since.

 

lol take it to the dealer and tell them you want the new 6l70e tranny...
no jk... ive never had that problem when it was new, thats kinda weird. Fluid isnt tainted at all? Stock, does it have a tranny cooler?

 

Ya right,tell them you want a LS7 while they are at it.Its taking off in second. next time it does it pull down quickly into manual low 1st and see what it does.Some here have reported it happend once or twice and never again.