I just purchased a tt3k from a member on here, used. It makes a big diffrence in a stock truck... My question is, I can only get it to stall to about 25 or 2600 rpms. Is this about right for a pretty much stock 4.8??? It works awsome, the tcc and everything is perfect. I am just wondering if that is all that my 4.8 will stall it too??? Any help will be greatly appreciated..
Thanks Guys,
Brian

 

Sounds about right. I bet you it flashes higher than that. Brake stalling is usually lower than the rated stall. It can probably stall a little higher as you add more power depending on how loose your converter is.

 

here are trans tables that should be disabled when an agressive torque converter is used. I think they are Torque Management'like tables.

Some people here have noticed that some TC's may loosen or tighten up as they "break-in". IIRC Precsion Industries recimmends that the converter not be ragged on until 50 torque converter lock and unlock cycles has been reached.

My engine will rev to 2500 rpm with the e-brake and foot brake on hrad and the throttle wide open. Its a stock S-10 6 cylinder torque converter. It decreased the rpm drop from gear changesby 400 rpm, it keeps my engine in teh powerband for better acceleration, plus better launches.

Maybe that TC you have will stall to 3000 rpm ona 5.3. The more torque you feed a TC the higher its stall speed. The 5.3 has more torque than the 4.8, and the 6.0 has more torque han the 5.3. That TC will fit the 4.8, 5.3 and 6.0, so your engine will stall at the lower rpm range of the torque range that this TC is rated for.

You can get your TC restalled if you arent happy. Precision Industries offers 1 free stall speed adjustment with its 2 year Warranty period. Any TC can be restalled. I dont know how much that would, you can maybe trade in your TC for a 3200-3500 rpm TC?

Anythind you do to that 4.8 to improve the engines low rpm torque will make your TC stall higher. PCM tune(can bring in more spark advance at lower rpm to boost torque plus disabling TM'like tables), longtube headers, cam, nitrous, blower, will make your engine output more torque and make your TC stall higher.

peace
Hog

 

everyone thinks a 3000 stall will brake stall to 3000 before the truck even moves. That has nothing to do with it. You will probably only be able to brake stall to like 2000 or so before the rear tires spin or the brakes dont hold.

If you are going down the road and slightly punch the gas the rpms will jump up to a EXACT point.. on your 4.8 it should be 2700-2800 since the 5.3 would stall higher to 2900-3100rpms. If you leave a light, notice that on the shifts the rpms drop back to like 2700-2900 instead of like 1800-2100 lol.

but just try going down the road and punch it slightly and notice what the rpms jump to instantly. It shoould be 2800-3000 behind a 4.8

 

The more torque you add... The better it will stall!!!!!