hfthe3rd

iTrader: (1)

Long story short my car was a complete bolt on 99 Camaro that was tuned. I had all bolt ons complete and 4.10 gears with 28” on the car while it got tuned.

So after that tune I put a 3800 FTI stall in brand new and drove it around with no issues at all . It ran great and made a 11 second pass. I always felt like the trans wasn’t giving the quickest shifts but it was shifting fine. Yes I probably should have got it returned but after a little bit of driving I ended up doing a head and cam swap.

The car went right to the tuner and he had issues after a few pulls . The Trans wouldn’t shift out of first under wot and also go into fourth gear. He messed with a handful of things to get the trans to shift but no luck so he did his best and gave me the car back .

I parked it last year not having much time to fix it but now I’m trying to figure out where to start. My first idea was trying to find a used 4L60e and just swap it in thinking maybe the trans burned up while being on the dyno.

MaroonMonsterLS1

So you only had 1st and 4th gear?

If this is the case, you more than likely just have a bad shift solenoid.

If I misread, my apologies

hfthe3rd

iTrader: (1)

MaroonMonsterLS1

if 1st and 3rd only, then the band is probably cooked. You should do a pressure test with a gauge on the line pressure port first and foremost. But chances are the band is toast. You could elongate the pin or buy a longer sonnax pin, but that's merely a bandaid for an issue that's already present.

Do a pressure test first and report back before shotgunning parts at the thing.

Kawabuggy

iTrader: (1)

Or, even faster, hook a scanner up and watch the data screen for gear commanded. Go out, drive the car, and watch the screen to see if the PCM is commanding a 1-2 upshift. If so, you KNOW the band, the reverse input drum, or the 2/4 servo is DONE. Most likely the band is cooked. Lengthening the servo pin will not fix this. If the PCM is commanding the 1-2 shift, and also the 3-4 shift, but the trans is not seeing 2nd, or 4th.. Break out the tools and get ready to drop the trans..

It's possible... but not likely... that the shift B solenoid is faulty, or the shift B valve is stuck in the valve body. Again, possible.. But I'd bet $$ on the band being damaged. If the band is smoked, DO NOT just put a new band on the old reverse input drum... I can guarantee you that if the band is smoked, the mating surface on the R/I drum is also now damaged as well. New band on an old/damaged drum will mean short life and rebuild again soon. Replace band & drum as a pair. In fact, replace drum and then a WIDE band as a pair.

SlasherVRGR

iTrader: (1)

Isn't having only first and third also a sign of a stripped out/broken sun shell? I believe I had this happen in my stock 99 1500 with a 5.3.

MaroonMonsterLS1

If he had also lost reverse, then yes. I see no mention of lost reverse, so that's why I didn't mention the sunshell.

fst100

iTrader: (5)

slightly OT, but hfthe3rd, out of curiosity, do you have a trans cooler installed?