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  1. Vortec 4800 4.8L V8
    Have a 2003 gmc 1500. 4.8. It has 130000 miles on it. It was all stock ran perfect. Everthing worked. Newly rebuilt 4l60 with about 2000 miles on it. Anyway, I put a btr stage 3 cam kit, cold air kit, trailblazer stall, longtube headers wuth cat delete and it has been tuned. Now all my lights...
  2. 4-Speed Automatic Transmission
    I had my 4l60e on my 07 new body style rebuilt last November 2021. Now I have very hard shift from 1st to 2nd. Everything I've researched is pointing to the 1-2 accumulator. Going to drop the pan and replace the old plastic one with a pinless Sonnax. Looking that the fluid the transmission man...
  3. Vortec 4800 4.8L V8
    When I start my truck and idle it has a knocking sound in park and I put it in gear it speeds up the noise beats the faster I go almost sounds like a sewing machine from the cab but it was doing that before and quit now it’s back again and I thought it was the torque converter but I’m not sure...
  4. Vortec 5300 5.3L V8
    Hello im new to this forum, i have a 2001 silverado v6 to v8 swap. Has a 5.3vortec,4l60e stage 2 w/shift kit and 2800stall, and 3.42 gears. When im driving on the highway my rpms are at 3200rpms at 60mph which i think its pretty high. Is this normal??
  5. 4-Speed Automatic Transmission
    2011 Chevrolet Silverado 1500 4.3 l V6 lu3 motor 4L60E transmission two-wheel drive extended cab rust free! 80,000 MI. Has had regular service intervals. The truck is slamming in to second gear. A few months ago it went into limp mode and it went haywire I did some research and changed the TPS...
  6. 4-Speed Automatic Transmission
    I have a 01 Silverado 5.3 2wd & I recently rebuilt the transmission (4L60) & before the rebuild I was missing 2nd & 3rd gear & it still has that same problem we swapped the solenoids twice thinking that was the problem but it wasn't anyone have any idea what it could be?
  7. 4-Speed Automatic Transmission
    Hey guys just got a 02 sierra and have flushed all the fluids and gotten all the lights turned off, new mas,, air filter, cleaned injectors, oil pan gasket, rear diff seals, and throttle position sensor. Engine runs like a champ but has a hard shift between 1-2 only when cold. Once it's ran for...
  8. 4-Speed Automatic Transmission
    I have a '93 Silverado C3500HD 7.4 engine and NV4500 transmission. I have never had a vehicle I enjoyed more. I had an accident in 2019 that Left me without the use of my "clutch foot". Here is my question, I have a donor truck that has an automatic, but it is diesel, and a C2500, can I by a...
  9. 4-Speed Automatic Transmission
    My 2006 Silverado 1500 4.8 is having some trouble shifting into gear. I can move the shifter all through the gears and it revs a little bit like it’s gonna shift but it won’t engage. I dropped the transmission to put the torque converter in correctly, because I didn’t install it correctly when I...
  10. Transmission-Transfer Case-Driveline
    I have a 2008 Silverado 1500 LT ext cab short bed 2wd. 5.3 out of a 09 avalanche 4x4, and the original 08 4l60e trans. The trans just went out 1-4th are all gone...I can go rebuilt brand new from a friend for $1000. Or go the 6l80 route. I have the harness, shifter and ecu from a 2012 with a 5.3...
  11. Transmission-Transfer Case-Driveline
    I've got a Silverado, removed the rear drive shaft to replace u joint and it wont go back in. I've removed drive shaft many times before and never had this problem. It goes in half way and stops completely, you can see the shiny part of the spline that is usually in the transfer case. Ive tried...
  12. 4-Speed Automatic Transmission
    The only way to truly bulletproof the 4l60e is w/ the Mason @4l79 But in my build (only 400rwhp 292cid)NO NITROUS, nitrous builds need some different parts . I feel comfy with oe size clutch pack that's optioned for it...searched a bit first and saw discussions about 4l60e and of course swaps...
  13. 4-Speed Automatic Transmission
    Let me start by saying this is my first post and I’ve spent hours looking through the forums for my issue and couldn’t find anything. If I missed it I apologize. Now the issue. At low rpm barely on the gas pedalI actually first noticed it while driving though a store front parking lot that’s how...
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