Since you know she's a keeper, put the transgo kit in, or replace the VB outright. I would really like some input on which option I should take. I have a different vehicle to drive so it's not like I'm without wheels. I'm going to keep this truck for a long time so I'm thinking of just parking it and saving up for that, but part of me wants to try to fix the old transmission first. Having a new remanufactured stock replacement transmission installed would run me about $2500 I'm guessing. Then, I've thrown away $500 just to need a whole new transmission anyway. And, of course, no guarantees this fixes the problem. So we're $500 into the original 213K+ mile 4L60E with questionable maintenance history. Thing is, I don't have a garage or lift, so I probably can't do it myself, and I assume it's gonna run me about 2 hours of labor at a shop, which is like another $250. Now, it seems that most likely I just need to change the valve body, which would run me about $180, then with new fluid and filter and stuff maybe $250: This would explain why DTC 1870 is often accompanied by a complaint of a hard 1-2 upshift." A little research online turned up this: "If at some point the transmission begins to slip, P1870 sets and line pressure is elevated in an attempt to stop any further slippage and prevent further damage. Well by the time I got there I was going the 1-2 shift went from a little annoying to REALLY hard, and the service engine soon light came on. I was stuck in traffic and noticed that the 1-2 shift was a little hard. Been joyfully driving this thing for a whole two days (about 400 miles) before the 4L60E betrayed me. Not sure how much I've posted about my $600 Suburban, but the short version is it took a lot of parts, time, money, and stuff to get it back on the road. ![]()
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