6789olds

Need some help i was leaveing the store the other day and my torque converter would not lock up. It normaly will lock up at 40-45 mph under light to moderate throttle . trans temp was 130*i would shift from 3rd to D and still no lock then i few miles down the road it starts to work great, nice and snappy like it always has . then yesterday on the way back from the dunes its starts doing it again on the free way 55-70mph i stompped on the throttle a few times and didn't really change anything then it would start working again wierd !!! i checked the trans oil its really clean its only got 2500-3500 miles on the converter circle d . I installed new filter and 7 quard pan when i did the converter. any ideas on what it could be ? is there a lock up selenoid that could be going bad ???

6789olds

also does any one know if the 96 tc lock up is on or off ? i have heard of something called pulseing tc lock up gm did ?

AKlowriderZ71

iTrader: (22)

Are you sure it wasn't 4th gear slipping? The description you gave is typical of it. Get a scan tool on there so you can command the converter locked, see the shifts, and see what's really wrong.

bow tie guy

You know of a " scan tool " that's bi directional, one that can command converter lock up? if so I'd like information .......... please

AKlowriderZ71

iTrader: (22)

OTC Genesys, HPTuners, EFI Live, Tech 2, Snap On, almost all of the ones made for professional use.

A "code reader" will not do what a real scan tool can do.

6789olds

no its not 4th sliping cause in my tune my tc will lock when i have it in 3rd as long as i am above 40-45 mph with light throttle . it shifts nice in the 2-3 and 3-4 shifts it just never locks and i can feel my loose rpms cause of the stall . but its not like it stopped working cause sometimes it does and sometimes it dont ?

6789olds

Sears: Online department store featuring appliances, tools, fitness equipment and more would this do the trick ?

Vince B

iTrader: (1)

In your sig it says "B&M" shift improver. Is this a skift kit or an inline programmer? Also how many miles are on this trans?

6789olds

its a black box with a switch the bumps up the line pressure .but i leave it off since i got the balck beartune and vette servo and billet OD servo.

Vince B

iTrader: (1)

I would suggest removing this box to see if it makes a difference. Its possible that this part is manipulating the pwm circuit for lockup and is breaking the connection to the solenoids.