IamSam

iTrader: (2)

Just did a rebuild on a 4l60e with a new converter from transtar. I installed the superior shift correction kit (4l60E-L) as well. I have built a few 4l60E's and have never had someone come back to me complaining about a shudder. I went for a test drive and sure enough.. it shudders when the TCC locks up.

According to the shift kit, the powervalve sends more fluid to the converter clutch than the stock valve. I told the guy he would need a new converter. Being a bit paranoid that it may be my fault, I would hate to have the guy replace his converter and still have the issue. To some of the other experienced trans guys, what should I check before I tell him to return the converter?

It shifts great in all ranges. No contamination on the fluid. It dosent feel like a misfire. I havent checked line pressure, but I doubt ill have an issue with that. Anything else anyone can think of? I may just be overthinking it!

JKB315

iTrader: (9)

My converter does the same thing . I figured it was just in its way out.

Snap-On

iTrader: (2)

If the tcc valve isn't worn, it's probably the converter piston cracked. I recommend the tcc fix by dr. Tranny, it cures most shudders

gto65lvr

iTrader: (8)

if its a stall converter you will need to tune the shift/lock up MPH to a higher MPH and retest until it goes away and locks when best for DD driving.