Riddle me this..

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
15,681
232
63
Fullerton CA
Had a guy give up and sell his LLY bc of this. Broke 2 flex plates and a flywheel, never figured it out. Fuel pressure at the filter head was spot on and desired and actual were within 4% of each other. We did find that the trans pressures were going nuts during the bad shift, but never could figure out why. Pulled the trans and it was perfect, looked almost new...:mad:

Good luck...

Did you have a pressure gauge on it?
 

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Yep. Its white too. My house now has a total of uhhh 1....2....3.....4.... 4 white vehicles... :happy2: "Hondarider's driveway" IS the definition of White in the dictionary:spit:
 

NC-smokinlmm

<<<Future tuna killer
May 29, 2011
5,195
360
83
At Da Beach
Did you have a pressure gauge on it?

My trans builder did the diagnostics, I have no clue how he determined this, but I will be sure to inquire next time. I did however see him yesterday and he said that he had the same issue with another truck that was totally stock. It ened up being a bad TCM, once it was replaced truck shifted perfectly....
 

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Changed fuel filter to Napa 3960. No change in WOT shifting, still hangs on 2-3 and 3-4 @ 3800rpm's.

Guess Ill never get the chance to figure out why :eek: Teardown starts next weekend, returning it back to stock.


I really do appreciate all the help in the past year I have received from this forum with this shifting issue. Steve, Kory, Ben, James, Mike L and everyone else Ive talked to on the phone trying to resolve this issue, I really do appreciate the help. It's time for me to wash my hands and move on. Im fighting an uphill battle and not winning. Most of the mods im moving over to the single cab, except the trans. I want to start fresh and have Mike go through it.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,664
5,811
113
Phoenix Az
You should really still bring it by tomorrow. I really wanna try swapping tcm's.

Brian, you know your gunna wanna run a tune bigger than stock on that truck and its still gunna hang shifts. I know you wanna quit on this thing but i aint gunna let ya. Bring thay bitch over tomorrow and lets dig in
 

DBUSHLB7

Team DMAX
Mar 9, 2012
2,789
0
0
Albuquerque, NM
You should really still bring it by tomorrow. I really wanna try swapping tcm's.

Brian, you know your gunna wanna run a tune bigger than stock on that truck and its still gunna hang shifts. I know you wanna quit on this thing but i aint gunna let ya. Bring thay bitch over tomorrow and lets dig in

Now that's a friend:thumb:
 

adeso

wait, what?
May 30, 2011
1,569
0
36
Minot, ND
have you tried replacing the fuel pedal/steering wheel/brake pedal interlink logic unit with one that works? Yours sounds defective