my transmission stays in first gear, sort of shifts into second- but its like i have a really high stall, i rev it up, and about 3k it "jumps". vaccuum line was connected. pulled the canister out, spring was missing, canister seemed kind of loose? is the tranny fried? i figured i would get a warning of some type... it was fine one night, next morning it was junk! any help/thoughts/ideas are appreciated. thanks

modulator valve, they are not expensive or hard to change. try it before you take it in

this would be where? looks like? how do i test to find if this is the problem? (man i hate sounding so inept-this is how my girlfriend sounds when i tell her to put the air cleaner on http://www.chevelles.com/forum/smile.gif ) thanks again for your help.

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Rich Miller, 1970 Chevelle Malibu 350(soon to be a 468!)
1973 El Camino (wifes car)
My POS(it looks better now, i promise!) (http://www.geocities.com/richrachel_69101)

Rich,

The canister you are referring to sounds like the modulator. The modulator should be on the passenger side above the pan towards the front of the trans. There should be a vacuum tube from it going up along the firewall to the manifold.

There is one bolt that holds it in place, you can buy a new one at any auto parts store. Remove the vacuum line attached to it, remove the bolt and it's out.

Hope this helps.

Rich

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70 SS - L34
Member # 442
www.chevelles.com/showroom/richr1 (http://www.chevelles.com/showroom/richr1)

http://www.my70ss.com

Don't lose the pin when you pull the modulator out!!! There will be a small steel pin in the modulator and they fall out sometimes when remove the modulator from the trans housing. Watch out for it.

how important is the spring that is suppsed to be in there? mine was missing. pin? no pin in here http://www.chevelles.com/forum/smile.gif is it possible that someone already messed with this tranny before? it never shifted right- the epitomy of a slush box. slow and soft. could this be why? thanks

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Rich Miller, 1970 Chevelle Malibu 350(soon to be a 468!)
1973 El Camino (wifes car)
My POS(it looks better now, i promise!) (http://www.geocities.com/richrachel_69101)

I'm a bit confused.......spring, pin......

First, the vac. modulator valve is located on the right rear of the trans. it has a vac. hose going to it. if it was loose it's probably because whomever installed it did'nt push it in flush before re-installing the bolt and retainer. This is the one that has a pin inside that, I've never seen fall out.

Second the Accumulator is located on the left side of the case. It is a domed cover held in place with a wire clip. It has a servo and spring inside. the spring is sometimes removed to make the shifts firmer.

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"Laissez Le Bon Temp Rouler' Cha!"
My Car (http://albums.photopoint.com/j/ViewPhoto?u=1271771&a=9414902&p=30842645)
"Jungle"Jim
A&P/ASE T/C#105
70SS396 & 70 Malibu
"I don't drive FAST, I just FLY low!"