Official NBS 4.3v6 to GEN 3 V8 swap Guide

[Fadingglories]

Yes so I went through all the trouble of pulling the motor this morning, replacing the oil pump, reassembling everything but now its on like what may be limp mode (a friend said it could be this but ive never heard of limp mode) and the truck won't shift into 1st or 2nd and when you take off its in 3rd or overdrive. It shifts flawlessly into park, neutral, etc but not 1st or 2nd. any ideas

[zebra]

sounds like the trans is in limp mode - basically in 1:1 gear (3rd) to let you roll around if necessary until you get it fixed.

possible solutions - i got nothing... i'm a standard transmission guy, sorry

[Fadingglories]

Its ok it started slipping today too. time to start saving for a built 4l60... i too have that battery light on and its repeatedly throwing a crank position learning code p1336 or something like that

[Frenchy]

You need to get a crank relearn done

[banker099]

Its ok it started slipping today too. time to start saving for a built 4l60... i too have that battery light on and its repeatedly throwing a crank position learning code p1336 or something like that

did u have tranny problems before the swap?

[Fadingglories]

No no tranny problems before this at all. I just think that it was about to go out anyways. Now i have to limp it around town and stuff till I get enough $ to get a decent tranny. A reputable shop quoted me 1100 for a built tranny with a 1 year warranty, Does this sound about right?

[DennisG_02Silverado]

my tranny went out two weeks ago, when i did my swap about a month ago. tranny lost 2nd completly then couple days later it wouldnt even go in gear. never had any problems with it before

get my built tranny back tomorrow morning

[DennisG_02Silverado]

No no tranny problems before this at all. I just think that it was about to go out anyways. Now i have to limp it around town and stuff till I get enough $ to get a decent tranny. A reputable shop quoted me 1100 for a built tranny with a 1 year warranty, Does this sound about right?

thats pretty resonable..... i paid a couple less than that at local tranny builder, that does nothing but gm rwd transmissions

[banker099]

i guess i better consider myself lucky, im still on my original v6 tranny

[DennisG_02Silverado]

ok i got my tranny back yesterday from the shop. took me alittle while but i got it installed. still dont't go in gear

first of all bout three weeks ago, 2nd gear went out. then couple days later the truck just wouldnt do anything while pulling into a parking lot.
emptied tranny fluid, no shavings nor smelled burnt. disconnected lines and no fluid flowing through

got trans back and they said nothing was broken inside but the installed a beast sunshell, however couple of clutches burned and bands. i installed it, put tranny fluid in. let truck run began to put more in and check. put truck in gear nothing.... anyway

they said my converter might not be shimmed right...... i was like ok i drove thetruck for two weeks with no problem after swap. then they said it could be wrong bell housing??? i think they never checked the pump to begin with, bc i'm still not getting fluid flow after their competion rebuild

has anyone ever had to shim the torque converter?
is there a different bell housing for v8 trucks?? called chevy dealer and they said it was the same