700r4 torque converter lockup

[Abaird24]

I picked up a very nice older restored 86 k10 a few months ago.  I did replace the tired 305 with a nicely built 350 that I had.  The truck runs great and shifts fine as well but the 2-3 shift is the where I have concern.  I noticed while swapping engines that the trans is a rebuild that can't have more than a few thousand miles on it.  When it shifts to 3rd gear the torque converter seems to lock up right away and there is a pretty substantial rpm drop that I think is too much.  If I am really putting my foot in it the lock up is a little delayed which is better but I don't know if this is normal or not.  I won't be doing any towing with it and it won't get more than a few thousand miles a year on it anyway but I didn't know if I should be worried or not.  I can provide more info if needed.  Thanks

[VileZambonie]

Tighten the TV cable 1 click at a time until you get it where you like it

[jg1977c20]

Tighten the TV cable 1 click at a time until you get it where you like it

you can only properly adjust the tv cable with a pressure guage hooked up to the transmission or you will kill it in no time - the cable controls line pressure . anything else is a lucky guess .

[VileZambonie]

Tighten the TV cable 1 click at a time until you get it where you like it

you can only properly adjust the tv cable with a pressure guage hooked up to the transmission or you will kill it in no time - the cable controls line pressure . anything else is a lucky guess .

Not true and increasing the tension on the cable will increase TV pressure which will not harm the trans in any way. Going the other way is what can cause low apply pressure and premature clutch failure.

[LTZ C20]

Tighten the TV cable 1 click at a time until you get it where you like it

you can only properly adjust the tv cable with a pressure guage hooked up to the transmission or you will kill it in no time - the cable controls line pressure . anything else is a lucky guess .

Not true, there is a process to adjusting the cable, it is simple, easy, quick and requires no tools or pressure guages. I've done mine multiple times. Not even GM requires a gauge of any sort for cable adjustment.