i had a trans 4l60e fully built and a 3200 stall converter (10 inch). im having a problem with the stall speed

after a burnout on m/t drags if i go to stall my car up it starts to load the rear at 1500 and pushes the car at 1800 (back tires rolling not spinning) and front brakes locked and dragging the front tires not rolling them. does this seem like the converter is not at the right stall speed, the shop told me its the brakes in the back are not strong enough to hold the tires ( there new pads and rotors!) and he said that theres nothing that can be done but try it at the track where traction is better???

has anyone else had this problem? i bought the car w/ a 2400 tci converter 3 years ago before i built the motor and never had a problem bringing that converter up to its stall speed?!?!

 

I dont think the brakes are strong enough. A transbrake could tell you for sure

 

My Midwest 3000 would hold until about 2200 rpm before it started to push thru the brakes.

My new Edge 3800 (hits around 4200) will hold to almost 3500 on the brakes before pushing thru.

 

so is it possibly the converter? it flashes around 3500 i think? how can i launch the car at 1500?!?! i know you cant put a trans brake in a 4l60e. is there any way i can make the back brakes stronger? i even tried the e brake still can get it up there?

what can i do to fix this, get it re stalled but more loose?

 

Youre wrong. You CAN get a transbrake for a 4l60e. If you want to brake stall higher you could always get a higher stall.

 

yea you can but every trans shop reccomended me not to put a trans brake in and i posted a thread on here a little while ago and people said its not a good idea on the 4l60e, im sure people have it, so if i want to brake stall it to 3500 i need a larger stall converter like a 4200?

 

Not exactly true. Rosslers has one and I hear it's doing very well. Yank told me to stall at 3500 you would need something like a 4000 stall. My 4000 stall should be here soon. Only problem is I wouldnt get a high stall verter just so your brake stall will be higher. You still have to think about shift extension, STR etc. A 4200 stall would be pointless on a obd1 4l60e.

 

so a 4k stall is the limit i take it? i dont really want a trans brake in my car and i would rather brake stall the car

thanks for all the info. im learning alot here...

 

What are your cam specs? What are all the mods you have? What does your powerband look like? Remember with a 4000 stall tq verter your shift extension will be something like 5k and it's not recomended for use with nitrous. I shift at 6800+. I shouldve dynoed my car first before choosing my stall but I said screw it. Yank and my builder said it would be fine so we shall see. If you ask people on this board (if you even get a reply for this type of question) most will tell you a LT1 shouldnt use anything higher than a 3200 which is bull.

 

i have a le2 cam, w/ le2 heads 9:8:1 cr , 1:6 pro mags, lt4 intake, cai, maf, 30lb injectors, 396 stroker, mad z tune, moser 12 bolt w/ detroit truetrac 33 spline axles, 3:91 gears, M/T drags

hotchkis lca's strut tower brace, subframe connectors and poly bushings chrome zr1 rims thats basicly it.

i shift at 6200 i may use nitrous not sure yet

thanks again

 

Well, here's a thought...

You have the tires to hook, so why not just flash the converter at launch? No need to stall up at all. Yeah, be hard on the rear, but I don't see why the 12 bolt wouldn't take it without complaint.

Give it a shot... but get to the track, because that setup NEEDS to be played with under real track conditions.

And FWIW, if you have skinnies up front, forget holding back the MTs that way.

 

That's what everyone told me to do.