For those that have installed a high stall convertor on a stock tranny, without touching anything else, did your shifts go soft on around town driving since the stall was higher?

 

yes this will happen with any trans that you install a loose converter in,, the converter is absorbing the torque/shock when the trans makes the shift, your trans is still shifting gears at the same rate your just not feeling as much of the jerk between gears

 

^^^^ Exactly. How much stall did you go. The stock tranny's are not gonna hold too high of a stall for a long period of time. Might want to look into getting it built before you have to buy a new tranny and stall. Just from my experiance.

 

I got a 3k stall for my '95 TA with the cam in sig. I haven't driven the car yet, its at a friends tranny shop. He installed the convertor and then said the shifts went soft. His shop does nto specialize in performeance stuff, only stock replacement. He changed the clutches since the tranny has 90k on it and now to firm the shifts back up some they're installing a larger boost valve, billet super servo and shift kit.
I originally thought a 3k may be too large for a street driven daily driver, but after talking to several tranny shops and builders and opions on this board this was the stall I ended up with.
The only other experience I have had putting a higher stall in was on my GN, but the tranny was rebuilt in the process and it shifted just as stiff afterwards as it did before and it was a 3k stall also...don;t have any idea what the builder did to it in the process...trannies are not my thing

 

you are going to need some ecm tuning also if you plan on racing it,, you are going to run into the high stall/ rev limiter problem that most everyone that uses a high stall on an obd1 car gets after the stall converter install

there are several good post on here about how to fix it,, i fixed mine by following all of the steps posted

 

I've already raised the rev limit after the heads/cam install, I believe its set at around 6300 now, on the dyno I pulled it all the way to 6200.
I also have experience changing the shift point tables...they are stock now, but I had to heavily modify them on my LT4 truck compared to the stock f-body settings I started from.

 

there is much more too it than that, do a search

 

All I find says change the 1st gear and the all other gears fuel cut off and fuel return rpms in the Constants tables?? Thats what I did and it pulled fine up to and a little past 6200rpms on the dyno.
If the shift points end up needing changed, I've done that already on my truck with the bazillion tranny tables...there's more tranny control tables than engine tables for LT1s in the PCM, so doing a few on the TA for WOT shifts will be a breeze.
What more would there be that I haven't covered??

 

If you have the OBD1 shift problem look at the pics in my sig. I posted tunercat pics showing what I changed to fix it.

JD

 

Thx for the info JD. So far its not really bouncing off the rev limiter..it just doesn't go anywhere per my other post.... I got the car back and it takes 3k rpms just to get moving normally and 22-2300rpms to cruise at 35mph...
Once I get this corrected I'll come back to this.