JeaneZ28

iTrader: (3)

Everytime I let off the brake while driving my car it instantly jump 3 to 400 rpms. Any advice would be helpful because this is really annoying.

JeaneZ28

iTrader: (3)

Anyone

JeaneZ28

iTrader: (3)

Help..

Wesmanw02

iTrader: (4)

Automatic??

Sounds like your throttle is sticking...

JeaneZ28

iTrader: (3)

How is possible when the rpms go down as I'm braking.

sroach20

iTrader: (31)

has anything been changed, tuned?

99345hp

Probably a vacuum leak in the brake booster.

JeaneZ28

iTrader: (3)

I swapped my tranny out and since then its been doing it. The tranny sponsor dont have a clue what it could be but a vacuum leak. The hose i can see are plug in.

99345hp

what does that mean? even if all the hoses are plugged in it wont matter, the booster its self can be leaking.

JeaneZ28

iTrader: (3)

It started when I put the new trans in. It wasnt doing it before.

spy2520

iTrader: (3)

vacuum modulated transmission?

maybe its trying to do some odd shifting when you let off the brakes.

JeaneZ28

iTrader: (3)

I dont think it has one its a stage 2 performabuilt.

99345hp

does it do it even if you are just sitting still with the car in park?

JeaneZ28

iTrader: (3)

No its only doing it when I'm above about 20mph

99345hp

did you call the transmission company and ask them if there is a reason why? Could it be in the lockup of the torque converter?

JeaneZ28

iTrader: (3)

I posted up in the trans section and the place I got it from didnt have a clue. The other vendors didnt know what it could be either. All they said was vacuum leak but it just happen right after the swap. I thought it might be the stall but I would like to know before I spend 8 or 900 dollars on a new one.