Nando92

Okay i dont know much about transmissions so the information i give could be vague..
So in my A4 everytime it shifts gears my wheels completely lock. As in COMPLETELY stops moving like i hit the brakes hard for less then a second...
At first i didnt mind it but since its my DD its starting to annoy me..
Does anyone have ANY idea why my wheels completely lock after every gear shift? it feels the most from 1st to 2nd gear but its still noticable threw every other gear change.

info: a few bolt ons like heads, cam, lid,LTs, 2600 lock-up TC that make 445hp on a dynojet

At first i thought the reason it was called a lock-up TC was cause it made the wheels lock but thats not looking right.. another reason was cause i thought i needed a bigger TC stall but i just have no idea

any help will be greatly appreciated and please dont flame my noob-ness

MasterTomos

iTrader: (15)

...Are you sure you're not just spinning the tires? AKA "chirping" second gear?

Nando92

sorry man i have no idea what that means.. im still learning
When i hit the pedal from first when i shift into second it does make a "churp" noise but when im just crusing and it shifts it feels like im braking hard

shorty(98TA)

Is it actually throwing you forward in your seat like you stomped on the brakes??? I have never heard of a auto trans doing anything like that. I think maybe you mite be confusing the impact of it engagging 2nd gear with what you believe to be locking up the tires. You had it dyno tuned and you have a stall your tunner tuned for it to ensure good firm shifts for max preformance. That my opinion but if your that worried about it find a reputable shop to check it out

shorty(98TA)

Oh and that chirp you are hearing when you shift from first to second while you have your foot in it is your back tires loosing traction and breaking loose

topgeer

iTrader: (2)

i cant really think of a reason why it would feel like hitting brakes. does it slow you down? do u notices the speedometer dropping mph? Are you sure its not just a good hard shift?

Nando92

Yes for a split second i go foward in my seat, then get pushed back.
The person who tuned my car does all LSx work and he didnt even notice the hard shift.. Im really just trying to figure out what the hell it is

Nando92

Im going to try and take a small video of it going down my block later today if that would help

Nando92

It only feels like im hitting the brakes for a split second so no mph drop, and im not sure if its a good hard shift cause i dont know what that is

I never had a car with this much power so im not sure if this is normal

topgeer

iTrader: (2)

you would know it if you felt it, im turbo 350 trans shifted so damn hard you would think it was gonna rip out the car. hard shift is ok but it should be crisp as well, ive never felt like the brake were being hit. it shouldnt throw you forward. video may help any other tranny work besides the converter?

shorty(98TA)

Your gonna be better off to have it checked out we arent gonna be able to diagnose it over the internet. I really think what you are feeling is a drop in acceleration just be for the tranny shifts immedeatly followed by the impact of a good quality shift. But like i said its not going to hurt anything to have it checked out by a shop

01ssreda4

iTrader: (96)

Maybe your chirping tires during shifts......man those feel oh so good.

MasterTomos

iTrader: (15)

my money is on chirping tires...your just losing traction

shorty(98TA)

^x2 mine too. Hes hittn the top of his powerband so acceleration platues then BAM a good hard shift slams him

TImmy_Jones

iTrader: (4)

I think that PCM may have some insanely high line pressure for shifts...coupled with a shift kit.

I had a GTP (yes i know, be nice) and it would shift real hard with performance shift mode and a tune in the PCM.

samson_420

iTrader: (1)

Most likely breaking the tires loose. . . . But, sounds odd.

When you break em' loose between shifts it's not something you can explain, it must be felt for one self . . . . . LMAO

SOMbitch

iTrader: (8)

[QUOTE=TImmy_Jones;14939570]I think that PCM may have some insanely high line pressure for shifts...coupled with a shift kit.QUOTE]


This^^^^

I have a built a4 with a shift kit and mine does this at low rpm shifts (under 2500 or a bit less) but not as dramatically as the op is describing....

Edit: Mine does it worse in 3 for some reason....

Nando92

I cant upload any home videos...
I guess its just a hard shift or something.
When i had my friend record my car driving by it looked like it shifted as hard as a corolla
Yet the video of inside the car you can hear the shift and see the camera jerk

Nando92

this sounds actually pretty accurate.. everytime it shifts from first to second it shift so hard i feel as though the trans is going to shoot out the back of my car and no tranny work besides the converter

garygnu

I to think it is too much line pressure and its messing with the shifts,delaying it.how many miles on the tranns,is it stock?too much line pressure ain't good.