Shifting issues

in my opinion when second gear is the only one affected usually you will find one of two problems either 2nd accumualtor piston and spring have failed or the band is smoked. Before anyone starts saying that if it were the band 4th would be problematic as well, I have heard this theory a hundred times however the servo travels further in fourth gear so it often will apply when second will not, 4th circuit in the servo also has more surface area which also helps. If you have enough horse power the worn band will show up after the 1-2 shift, which may feel fine, takes place the engine will drop rpm as expected then begin to pull through the band causing slip which often times will cause the engine to bounce of the rev limiter. In near stock form you may not even notice it going till its gone. I would follow the above advice and pull the pan and change the filter as well as visually check the fluid and also pull the 3 bolts tha hold on the accumulator to be sure it is ok.

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Originally Posted by decibles

in my opinion when second gear is the only one affected usually you will find one of two problems either 2nd accumualtor piston and spring have failed or the band is smoked. Before anyone starts saying that if it were the band 4th would be problematic as well, I have heard this theory a hundred times however the servo travels further in fourth gear so it often will apply when second will not, 4th circuit in the servo also has more surface area which also helps. If you have enough horse power the worn band will show up after the 1-2 shift, which may feel fine, takes place the engine will drop rpm as expected then begin to pull through the band causing slip which often times will cause the engine to bounce of the rev limiter. In near stock form you may not even notice it going till its gone. I would follow the above advice and pull the pan and change the filter as well as visually check the fluid and also pull the 3 bolts tha hold on the accumulator to be sure it is ok.

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Very solid advise. If a 1-2 accumulator piston is damaged, main line oil on one side of the piston will enter the 2nd gear oil circuit. This will keep the band applied even though the solenoids are both energized. Personally I would get a new 1-2 accumulator piston and seal and while you have the pan down change it unless the pan is full of debris. Vince

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Originally Posted by Vince_B

Very solid advise. If a 1-2 accumulator piston is damaged, main line oil on one side of the piston will enter the 2nd gear oil circuit. This will keep the band applied even though the solenoids are both energized. Personally I would get a new 1-2 accumulator piston and seal and while you have the pan down change it unless the pan is full of debris. Vince

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Thank you both for the advice! I'm leary to tackle the accumulator piston and seal UNless its as easy as simply dropping a few bolts out and exchanging the parts out??
I'm what you call a backyard mechanic with little experiance with the transmissions other than dropping them out and putting in another 1. Dipping into a trans lets just say I've left it to the experts.

I will get under the truck hopefully in the next week or so to adjust or relocate my exhaust as its hitting the tow hitch and its driving me nuts.

Yes, it's easy to change...

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Originally Posted by Vince @ FLT

Here is a photo of the valve body bolted to the trans along with the 1-2 accumulator housing. Bottom left is where the 1-2 accumulator is located. Bottom right is where the forward accumulator is located.

http://i110.photobucket.com/albums/n...t/IMG_1416.jpg

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Originally Posted by Beatdown Z

Yes, it's easy to change...

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Thanks for the feedback. The photo just put me at total easy going in there and replacing both the accumulators. Figure its a lot more practical to replace both of them at the same time versus having to do this twice.

I'm assuming that between the 2 that those are the shift selenoids?

There's a total of three accumulators. Two are easily accessible, the 1-2 and forward accumulator, but for the 3-4 accumulator the valve body must be pulled to replace it.