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TC LOCK-UP QUESTIONS!!!

4.7K views 12 replies 6 participants last post by  WoodBoy  
#1 ·
The truck in question is an '08 with 3.73 in the diff. I'm running the minimax with the hotdamn and race-shift tunes. Why would the TC lock-up in fourth gear under a heavy load,unlock shift into fifth and lock-up again, is this normal ? I have installed procomp ladder bars for the 6'' lift the truck has and its on 37's. Also what can ido for the limited slip only one spins it sucks? Thanks in advance for any help guys.
 
#2 ·
did you just load up the tune? sometimes the tranny needs a bit of learning time to adjust to the shifts and driving habits.

as far as the one wheeler pealer...it is what it is unless you drop coin and upgrade to something else
 
#6 ·
Mine doesn't lock until after 45 and in drive. But I think if I load the race lock file it locks in every gear, well probably not 1st.

It could be your TCM, like I think my quirk is. Mine shifts into fifth, and stays in it if I am under 2500 rpm or over 3000rpm when it shifts. If not then it drops into OD then out of it into fourth then a sec later back into OD.
 
#9 ·
I had my gears changed too. I have the live wire with Eric's tunes. It compensates for tire and/or gear changes. I have been worried that it could cause damage, just haven't been able to get anyone to narrow it down for sure. Just phone conversations.
 
#11 ·
will do, It has done it since first tuning it and with different tuners. It is about the only thing left it can be.
 
#12 ·
37's and 3.73 gears.
The harder you shock a limited slip the more it grabs, with 3.73 gears you wont be able to shock it too quick. If it were my truck I would have 4.56's in it.
My 04 had 35's with 3.73's. Went to 4.56's, guess what would spin both. I am not saying that yours will too, more so if your clutches are all toast.
On the TC, mine doesnt do that. But I am into OD and locked TC around 35, 4.88's shift quick. I use the firmer than stock and lock from Eric.
In the H&S I am wondering if the tire size is screwing with it.
For the Innovative put the tire size in just a little bigger than what you have and see.