Tonkaobs
Newbie
hey guys ! First post here I have a 1998 gmc sierra 5.7L 4L60E 4speed NP243C electric transfer case 4wd obviously. 50k on trans 140k on motor. It’s lifted 10 inches on 35s I just wanna give a quick motor and mods list before I go down my rabbit hole.
Ok first problem —
last week my straps flew off my u joints and my drive shaft fell out on the highway. So fun considering I just got this driveshaft cut specifically for my truck build and spent 800$.
Second problem
it split the transfer case adapter in half so I pulled out transfer case rebuilt and re sealed transfer case. put a new adapter in obviously.
Third problem -
All was well besides the fact I way over filled the trans by 3-4 quarts realized this very soon only drove 5 miles like this.
FIX for third problem -
I drop the Trans pan to let fluid out and changed the gasket and filter while I was in there. Yes I put the new seal in for the filter and I dropped the pan twice to make sure the filter was sealing and not sucking air.
Issue four after “fixing” third problem—
After I dropped the pan the first time and bolted her up she would shift from first to fourth but fourth was very soft feeling? After the truck warmed up it would get stuck in a limp mode and not go out of second. Shortly after a few KOEO cycles and me checking harnesses etc. I got a P1810 TFP valve position switch circuit code. I unplugged the battery and reset the codes truck drove fine for about 8 minutes but every time now that my truck gets up to temps it will go in limp mode.
Other odd ends and outs—
I’m at a loss I ordered the new fluid pressure sensor for it. the truck ran great before the drive shaft incident. Very upset as I just overhauled the is trans and put a shift kit in it 8 months ago. Any help would be amazing. One more this I have CEL on for maf and cam sensor I have replaced those twice the truck runs fine no stalling weird idles etc but no matter how much clearing I do the CEL will not go away for those two codes but it’s been that way for years I don’t think that associates. And a ABS code for a broken left front wheel speed sensor. Again been that way forever I’m not sure they correlate. Please help. thanks for reading !
Ok first problem —
last week my straps flew off my u joints and my drive shaft fell out on the highway. So fun considering I just got this driveshaft cut specifically for my truck build and spent 800$.
Second problem
it split the transfer case adapter in half so I pulled out transfer case rebuilt and re sealed transfer case. put a new adapter in obviously.
Third problem -
All was well besides the fact I way over filled the trans by 3-4 quarts realized this very soon only drove 5 miles like this.
FIX for third problem -
I drop the Trans pan to let fluid out and changed the gasket and filter while I was in there. Yes I put the new seal in for the filter and I dropped the pan twice to make sure the filter was sealing and not sucking air.
Issue four after “fixing” third problem—
After I dropped the pan the first time and bolted her up she would shift from first to fourth but fourth was very soft feeling? After the truck warmed up it would get stuck in a limp mode and not go out of second. Shortly after a few KOEO cycles and me checking harnesses etc. I got a P1810 TFP valve position switch circuit code. I unplugged the battery and reset the codes truck drove fine for about 8 minutes but every time now that my truck gets up to temps it will go in limp mode.
Other odd ends and outs—
I’m at a loss I ordered the new fluid pressure sensor for it. the truck ran great before the drive shaft incident. Very upset as I just overhauled the is trans and put a shift kit in it 8 months ago. Any help would be amazing. One more this I have CEL on for maf and cam sensor I have replaced those twice the truck runs fine no stalling weird idles etc but no matter how much clearing I do the CEL will not go away for those two codes but it’s been that way for years I don’t think that associates. And a ABS code for a broken left front wheel speed sensor. Again been that way forever I’m not sure they correlate. Please help. thanks for reading !
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