anyone have to wait till thier trans warms up bef driving?

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Jan 30, 2005 | 08:01 PM

#21

willwren

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Quote:

Originally Posted by opensourceguy

All they will do is hook your car up to this machine, that will pump air through your tranny [i think] pushing the fluid out, while replacing it with new fluid. Or just drop the pan, drain refil [not a tranny flush].

-justin

Nope. The machine has a piston in it. The piston is all the way down when you start. Your old fluid is pushed by your own transmission pump into the lower chamber, driving the piston up, which has new fluid on the top side. As the piston rises, new fluid is forced into your trans. No air involved at all.

Air would be really bad news for this type of service.

Jan 31, 2005 | 02:25 AM

#22

zo6vette

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i was wondering what does the vacuum modulator do for the trans? does it deal with transmission shifting? doesn't it provide the trans to shift properly?

Jan 31, 2005 | 02:33 AM

#23

LakevilleSSEi

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Quote:

Originally Posted by zo6vette

i was wondering what does the vacuum modulator do for the trans? does it deal with transmission shifting? doesn't it provide the trans to shift properly?

Modualtes line pressure for your shifts into drive gears or reverse....If the lines going to the modulator are shot...then you're tranny slams into gear like your at the limiter and drop it into gear.