crapyboy750

Who has a stall converter and when the car shifts gears the car jerks?

I thought this was normal but i was told its not.
Does this mean that i need to get my stall tuned or whats going on, and also i get 13.8 miles to the gallon so im thinking the untuned stall might be causing most of the mpg loss.

If not please let me know what yalls ideas are.

waterbug1999

iTrader: (3)

Its not normal... I cant even hear nor feel my shifts.

crapyboy750

is yours tuned?

waterbug1999

iTrader: (3)

For the most part... Are you talking WOT are a gradual acceleration?

performabuilt

iTrader: (25)

Well my first question is what stall do you have?

crapyboy750

No im talking about just anytime driving city or highway it jerks into each gear.
I thought that was just normal so i haven't worried about it until now.

Now im starting to think if its not the stall then what could it be?

crapyboy750

3200 not sure brand bought by previous owner.

waterbug1999

iTrader: (3)

And other mods..

GT Griller

iTrader: (8)

I can feel mine but thats the way i had the tranny built.

crapyboy750

maybe then thats what it is. The tranny was a stage 3 century rebuild so i guess theres the reason.

performabuilt

iTrader: (25)

Yes it probably has a shift kit and if thats the case the "jerk" would indeed be normal , It was built to do that. So I would say you dont have a problem just a Built Transmission,

crapyboy750

What does the "shift kit" do exactly?

i just still dont understand why im getting such shitty gas mileage though.

GT Griller

iTrader: (8)

its not the trannys fault that ur MPG sucks......in town with a stall ur gas mileage will go down, but if u have a lock up type converter then on the highway there should be no change from a stock converter.

performabuilt

iTrader: (25)

Like he said you have a stall . Your hwy milage depending on the other mods should not be affected by it but your around town milage will suffer considerably its the price you pay for all that go.
A shift kit firms up clutch engagement for performance drivng and to increase duarbility in a performance car. This is not a luxury car you have bought its a performance car , Gas milage and comfort are considered secondary issues here.

crapyboy750

OK ya because i know that a stall decreases mpg so im trying to wonder why i only get 165 miles a tank.

TA1364

iTrader: (11)

Try less hot rodding, LoL

performabuilt

iTrader: (25)

Thats the price, You could return the stall to stock which would improve the MPG but would make the trans feel even harder on the shift "jerk" So then you would need to have the shift kit removed also since likley it would feel very very harsh .

crapyboy750

no man i rarely hot rod it when i get 13 miles to the gallon. and being my DD

waterbug1999

iTrader: (3)

Will a vacum modulated 60E ease the shifts up at part throttle correct? And hit hard at WOT correct?

performabuilt

iTrader: (25)

Its another way of controlling presure in fact in the TRANSGO modulation instructions it says may cause harsh part throttle shifts. The shift kit and how it was set up is more important, How much acumulation restriction and feed hole sizes. Presure settings