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Old 02-21-2021, 11:57 AM   #5
57taskforce
All about them K’s
 
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Join Date: Jun 2014
Location: Farmington, New Mexico
Posts: 6,229
Re: 6l90e no reverse

Like I told 1976gmc20, I’ve had a few of them in company trucks, as a company we’ve had a ton of them. They have been very reliable for us. Only 2 failures in 50+ Trucks that I know of. I’ve beat on the one in my current ‘18 2500 pretty good. 86,000 miles currently and no signs of slowing down. The 6 speed is far superior to the 4l80 or the th400, like 1976gmc20 said, your always in the right gear. I’ve always hated the huge gear drop offs on the 4l80E. It’s either you don’t have enough RPM or your revving to the moon trying to pull a load. Here’s a picture I posted a while back of my current 2500HD. It’s weight, as of a couple weeks ago is 11,500, air compressor, clean and used oil pumps and tanks, torch and tanks, tools, auxiliary battery mounted in bed with power inverter etc. it all adds up. (gross rated at 9800 I believe) so figure close to an average of 2K over weight for the entirety of its life. It’s been mud bogged out in the oil fields with chains on all four wheels, and pulled trailers it probably shouldn’t have. It’s got rear auxiliary air bags that in this picture were inflated past 100lbs (that’s where the air bag compressor gauge stops) pulled it just fine for ~40 miles, up a couple of decent grades with no issues.
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'57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888
'72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's
‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue
‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0
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