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  1. 8

    2001 LB7 is my Trans toast?

    i got it from transtar its just a stock converter i believe with a billet cover.
  2. 8

    2001 LB7 is my Trans toast?

    She's going strong now got the fluid back to a bright red color and the fluid temp stays where it should. now that the TQ works i noticed when towing in Tow Haul the converter locks really hard mid way through 2nd gear when gaining speed from a stop. sort of like dropping the clutch in a manual...
  3. 8

    2001 LB7 is my Trans toast?

    I did clean my cooler and cooler lines best i could i back flushed with new clean fluid and compressed air. I'm sure theres better ways to go about it, but it did the job. installed a new valve body and so far so good. shifts fine when warmed up now so we'll see once i hookup to my trailer again.
  4. 8

    2001 LB7 is my Trans toast?

    I’ll look into that. Can you not order new valves or is that the best option because the bad valves may have hurt the bores in the valve body?
  5. 8

    2001 LB7 is my Trans toast?

    I’ve tried uploading a picture #33 and #59 are the valves that are all scored up and damaged. F trim valve and I’m not sure of the other valve. Where can I find these parts? Also #16 had some debris in it making it stick pretty good does anyone know exactly what valves these are?
  6. 8

    2001 LB7 is my Trans toast?

    No worries i knew that was coming. i understand an allison tech has the knowledge that i don't know, but that exactly why i do things myself is to learn this knowledge. i have 3 other trucks to use to tow my trailer so I'm not so worried about this one being parked. I know that you should...
  7. 8

    2001 LB7 is my Trans toast?

    Well the truck seemed fine for awhile. started throwing a p0741 code came up the first time towing my trailer taking it pretty easy. it only throws the code when towing my trailer and after the trans was warmed up to operating temp. trans would get hot when this code shows up I'm assuming...
  8. 8

    2001 LB7 is my Trans toast?

    drove around town for 2 days taking it easy ran and shifted good so i hooked it up to my ~8000lb toy hauler and drove 100miles through some hilly terrain down to the sand dunes here in utah and she did the deed just fine. once we slowed down to about 30-40mph the trans started to get a little...
  9. 8

    2001 LB7 is my Trans toast?

    well heres an update. i tore the trans out figured shops charge to much so id save myself some cash and ended up building it myself (first time I've ever looked inside an automatic transmission) my buddy had a book for allisons and i added a transgo jr shift kit, alto red clutches, and billet...
  10. 8

    2001 LB7 is my Trans toast?

    Thanks guys for the replies. I'm just gonna get to pulling the trans and having it built by a reputable shop. or maybe even order a reman unit but i want something that will handle a decent amount of power like a 200hp tune nothing crazy. heaviest thing i own is a 10,000lb max gvwr toy hauler...
  11. 8

    2001 LB7 is my Trans toast?

    That’s what I was afraid of is the Allison a very complicated trans? I’m pretty mechanically inclined and not afraid to tear stuff apart on my own but I’ve never rebuild a transmission would it be a good idea to tear into it and see if I can replace the clutches myself?
  12. 8

    2001 LB7 is my Trans toast?

    Hi, I'm new to the forum Ive searched every forum that i can find on this issue and have tried all the tricks and recommendations. I've just recently bought a 2001 lb7 duramax with the 5 speed allison. I got the truck real cheap and had no idea if it even ran. (Repo truck) batteries were toast...
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