My converter does the same thing and it annoys the absolute hell out of me... I've been told there's no way around it. I like how the 60 stays locked on decel.

I haven't been crazy about the performance of my 80E vs my old FLT-5 65E... But then again I can't say that's fair since this trans has never been 100% healthy. Ill be able to tell something when the trans I picked up today goes in. But yeah, even with my fairly large converter it still feels sluggish in comparison...

 

Theres kinda a difference in a 60E in a 11 second truck and a 60E in a 11 second truck that gets run hard and tows alot with all that power.

I kept breaking output shafts and having problems with torque converters. I got so aggravated with spending all that money and having problems. So got my hands on a 80E and just put a shift kit in it. With the stock cam and lil 60mm turbo it had plenty down low especially towing at 2000rpms.

Now that i have a 76mm and a cam, i lost some low end. but it still has plenty of low end and a monster of a top end.


I know what your talkin about once you let off the throttle and get back in it, the rpms go up then it locks.. Ive learned to ease back in the throttle till it locks then get on it. Theres no way around it that i know of.

id take what i have now over a 4L60E anyday. im not scared to hook up to a 8000# trailer and hold it to the floor


Theres pros and cons about everything, ill take reliabilbity over speed anyday.

 

I know on OBD1 there is a constant I can change to keep the converter locked during coasting so that when I roll back on the throttle its already locked. I just never have invested the time to look through the Hack to find it. My converter is so tight as it is its really not an issue for me. I still don't get why you guys are noticing a sag in take off even with a high stall. Mine only stalls at 1500 and it will rip through first like its nothing and thats with the hot cam.

 

Thats what i needed to know.. Cuz I dont plan on hooking to a trailor with mine...ever.

 

I would say the the 350 has lot more down low then 5.3.

 

Well played with the tcc apply rate, PWM and lock-up feels alot better. It's go into lock alot fast when letting of throttle and getting back on it. There not big delay like i had before.

 

Yeah, that's one of the reasons GEN III/IV powerplants like higher stall speeds. For the most part, the power comes on later...

You put a soggy low end, not in boost yet, a tightish converter and the very large rotating internal mass of the 4L80E not to mention gearing, you've got the recipe for a dog out of the hole and low speed situations for sure...

 

Good point..

 

I have had a 60e forever in a vehicle. Last year I bought a 1500 HD with an 80e. It took sometime getting used to, I sold that truck and bought a Duramax with the Allison and don't notice as much difference from 60 to 80 than 60 to Allison.

 

I tow alot with mine, like i said im not scared to hook up to a 8000# trailer and hold it to the floor

Im goin to mess with the apply rate like he said and see how much that helps on mine.