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  1. Engine & Performance
    I was on the road for work the last 2 or so weeks and when I get home today I see this. (1st and 2nd Pic below). The rear I'm pretty sure it's a tail housing seal that needs to be replaced but as I look more forward and see more leakage..... what could the front one on the bell housing come...
  2. Engine & Performance
    I have a '95 G20 with a 5.7L, and my 4L60E overheats. No slipping, or dragging. Only issue is slightly harsh shift from 1st to 2nd. Transmission was bought as "rebuilt", with new torque converter from an online shop. I use my van for occasional towing of a 20' travel trailer, but the trans will...
  3. Engine & Performance
    Hey guys I’m looking at replacing my transmission in my 1997 GMC Sierra 1500 Z71. I found a fairly new GM crate transmission 4L60E out of a 2004 GMC Suburban Z71 local to me. Would I be able to make that trans work in my 97’ or is there too much difference in the newer 4L60E’s? Thanks!
  4. Technical Department
    I purchase a 1999 gmc sierra for $400 that had a bad transmission. I replaced the transmission with one that came out of a wrecked running truck. The truck shifts fine and I can manually put it in 1st-3rd but im getting a bunch of codes related to the transmission along with other codes. I have...
  5. General GM Discussions
    I have a 2004 silverado 2500 6.0 with a 4l60e trans. When I am doing 80 on the freeway, it runs at 3000 rpm. Does this sound right? The shop that had just rebuilt my trans had said that my p0300 (random misfire) code is keeping my torque converter from locking up. Does this sound right?
1-5 of 5 Results