Att: all OBS silverados with NBS 99+ LS conversions... HELP

[BlownChevy06]

ok well i did LS 6.0l swap on a 1999 silverado obs i used the same tranny 4l60e
(4x4) and same converter. i used a special flex-plate and spacer to bolt them right up. ok my question is how did you all get to work the speedometer and Tachometer and the rest of the gauges with ur original cluster? ok i used a wirring kit a company PSI makes realy simple to install just a couple of powers and grounds... the harness has a couple of signal wires ready to hook them rigth up, under dash example like speedometer tachometer MIL light fans ect. and there is 1 wire that is called TCC that i have un hooked (12v brakes off rigth) but dont know how to hook up. the truck turns on nicely runs and everything but only in reverse it can burn sum rubber truck feels realy ligth & in drive the truck runs but it feels realy sluggish realy heavy like if the 4x4 low was on or if the foot brake was engaged but it is not. So what do you think of this. thanks for the help gusy
im getting ready to just order a set of gauges from Atech and install them... need help fast
here are sum pics.

[oleshifty]

I haven't done the swap, but I know most gm's go in 'limp home in 2nd gear' mode whenever they sense a big problem. That's probably why it's such a dog, though i would imagine, you should still have SOME power in 2nd.


TCC is torque converter clutch, that's the one probably causing problems. I don't know where that wire goes, but do a search, there a few pretty good threads on here about this conversion.

[BlownChevy06]

^^^ i kinda know how to hook the TCC wire already but i just need to find sumthing that dose not have power when brakes are applied. truck revs pretty good RPM's are quik when i rev it. its just that when its in drive... it takes around 1600-1900 rpms in drive so the truck can move foward. ill try and get a video tommorow of a test drive.

[danger_ranger83]

The brake signal wire needs 12v without the brake pedal pressed and needs power once the pedal is pressed

[BlownChevy06]

anybody else...? ohh well i just got the new set of diginal guages with white face and im gonna pull down the tranny and inspect it and install a new Trailblazer stall and NBS flywheel. thats for the help guys