QuickSilver

iTrader: (22)

When at the track if i get any wheel spin it goes right to 2nd, also seems like it almost gets stuck between 1-2. It also shifts very quick when leaving from a stop and not at the track.
The trans was rebuilt with a TCI kit and replaced any broken parts inside(nothing major).

Any ideas??
Josh

Gilbert@Ace Racing

I am going to suggest that there is an issue with the 1/2 shift valve in the valve body.
Does it do this at WOT and part throttle?

g

performabuilt

iTrader: (25)

Are you manually holding second or are you in OD in OD if your wheels spin your PCM is going to assume you are moving much faster than you are and comand a shift. It will also do this in manual low but at a much higher speed. What happens if you launch in such a way as not to spin , If this dosent happen there then the spinning is your issue and it isnt a problem as far as trans and. tuning

QuickSilver

iTrader: (22)

it only quick shifts at wot with wheel spin, doesnt take much just a bit. But when it does it at WOT it doesnt go all the way to the next gear (atleast doesnt feel like)

It is much worse when just trying to street drive it part throttle it is into 3rd befor i hit 20 mph unless i stand on it. then it hold the shifts out.

when i race i keep it in 3rd D
Josh

flynlow3

iTrader: (2)

Sounds to me like your band could be slipping a little if it feels like its in between gears.

performabuilt

iTrader: (25)

The part throttle quick shift wories me you really need to get the car on a scanner or tunner with data capabilites and watch and see what the PCM is comanding , This sounds to me more like a tuning or sensor issue than a mechanical issue, Bear in mind the trans can only do what its told as far as shifting. Be carefull though I have seen the quick shift thing damage the trans to much load on the frictions . You also didnt mention if you had a stall and what it was?

QuickSilver

iTrader: (22)

yank st-3500

performabuilt

iTrader: (25)

You definatly need to look at the tuning and what the PCM is actually comanding shift wise, Until Thats corrected I suggest though I know its hard stay outta the throttle lol

QuickSilver

iTrader: (22)

when i get into the throttle it holds the shifts out like it should. Its just when im easing away from a stop/

Turnin20s

iTrader: (12)

I know what you meen man, my tranny is doing the exact same thing. Under light throttle leaving a stoplight I will be in 3rd by the end to the intersection or about 20 mph. And on WOT runs it acts like its shifting into 2nd, but just revs like its inbetween gears, and when I let off and get back into it it will start slipping again and then catch. But my tranny only seems to do it if it starts to get warm, like alot of in town driving.

But I'm thinking of converting to A3, but I'm having a hard time trying to make up my mind LOL

Gilbert@Ace Racing

It is possible that he PCM is shifting according to the "Hot" or overtemp table on both of the cars mentioned.

Both should be scanned in order to determine the reason for the stack shifts. Gears can have a significant influence on shift timing as well.

g

performabuilt

iTrader: (25)

You could consider and A3 or you could solve the PCM or overtemp issue another option would be a full manual valve body

Turnin20s

iTrader: (12)

I thought that the full manual valve body on the 4l60e was a bad thing to do to these trannys, something like holding the tranny in the gear for too long and tearing up the pump??? I don't remember, but all I know is that I can get a built TH350, 9.5" converter stall of choice, full manual reverse valve body, with a trans brake for less than half the cost of a rebuilt 4l60. And down the road I could always get another 4l60 if I didn't like the A3, but thats just me.

I'll try to see about getting a scan done, but I have to get my buddies laptop, but the datamaster can scan the tranny too right? What do you guys think the problem would be?

Another thing, does anyone have a video of how the 4l60 should shift? I drove my buddies 99 Trans Am and it shifts the same way my car does, so I just figured thats how they are suppost to be.

I'm not trying to argue or jack the thread, just incase I came across like that.