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  1. 77 K20

    Traction Aid for 77 K10

    There was an issue with the Eaton E-locker. They are now up to the 4th generation now (I believe). Earlier ones had to unlock then lock again as you shifted from forward to reverse. And sometimes it didn't want to lock back up. I guess the newest ones don't do that anymore- but I don't have one...
  2. 77 K20

    Traction Aid for 77 K10

    eaton's website The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction...
  3. 77 K20

    4.10 gears

    RPM, speed, gear ratio, tire size calculator Spicer has a calculator for this (click link above). It even estimates in torque converter slippage. A 265/75R16 tire is 31.7" in diameter. But the tire will squish down due to weight. Isn't going to be a true 31.7". Lets say 31". With 4.10s you...
  4. 77 K20

    4.10 gears

    Some stock trucks even came with factory 4.56 gears. "Highway" speeds means many different things to people in different states. If you are in Texas with the speed limit of 85 mph and where people do 90 mph... then not so much.
  5. 77 K20

    2003 Acura MDX

    Nice score! And looks to be very clean. And why the hate of VW Touaregs? I have 3 of them. They serve their purpose... All depends on what you are used to. :happy107:
  6. 77 K20

    Spark plug wires

    MSD wires These are the ones I ordered from Summit racing last year. Been happy with them. $135 They technically are for the 454 but a little extra length is good so they can clear the ram horn exhaust manifolds I have.
  7. 77 K20

    Water on drivers floor

    What years was foam installed? What about the plastic? In the 80s?
  8. 77 K20

    Softopper - I've been waiting for

    I believe this is what I bought at Lowes. Rubber weatherstripping, marine/automotive. Weatherstripping link
  9. 77 K20

    Softopper - I've been waiting for

    I stayed away from the typical foam gasket material because I didn't want it to soak up "de-icer water" here and eat my truck more than necessary. I found some stuff that was more like a squishable rubber that wouldn't be as likely to soak up water (and potentially freeze in winter). I ran it...
  10. 77 K20

    Thoughts on going down to 37s?

    If you were to change out wheels also then might keep checking the blem list at Interco if you want a better price: Blem List (click me) For instance they have five 37x12R17 tires for $269 ea Or seven 37x14.50R17 for $275 ea
  11. 77 K20

    Softopper - I've been waiting for

    I think mine is moved closer to the cab than yours. The corners are pretty tight on mine. The directions say pull down on the very top of the corners when snapping/unsnapping. I don't think the snaps will ever pull thru that material- but I did have 2 snaps pull out of the aluminum square...
  12. 77 K20

    Softopper - I've been waiting for

    I previously had an aluminum topper. I started out with just clamps but when off roading and twisting up the frame I found that the topper would start to shift. I ended up just drilling one hole on each side to hold it. The ends still had a little "flex" in the clamps if needed. BUT- with the...
  13. 77 K20

    Softopper - I've been waiting for

    I bought mine used in 2012. It was wadded up behind some guys garage. He managed to stab/rip it somehow on the rear flap/window. Probably a 4" rip. I patched it, that panel is replaceable also but never did. I love it. It can fold down if needed, it is water proof. I've camped in the back of...
  14. 77 K20

    Lifted Dually Suburban wheels/tires?

    I did this once getting 3/4" crushed. Massive loader bucket was around 12' wide- took a big scoop out of the pile and dumped it right in my truck. They weigh you empty and then full... 5,500 lbs of gravel in my K20. Wasn't bottomed out, but anything above 45 mph was very scary. I stayed at 40...
  15. 77 K20

    1985 K20 Suburban stabilizer

    I went back to ORD's website and looked... I see they offer two options. One is their HD tie rod with factory tie rod ends and the other option is with their own design of tie rod ends. And that is the option you must have selected? In that case you would need to get one of their steering...
  16. 77 K20

    1985 K20 Suburban stabilizer

    Guess I don't know what tie rod you went with. The new aluminum one? Cause I have ORD crossover and their thick wall DOM tubing tie rod end and used a steering stabilizer...
  17. 77 K20

    Anyone use edelbrock universal EFI fuel sump Kit w 2 tanks

    I've been using the Edelbrock fuel sump for over 8 years. Haven't had any issues. Like the diagram above, output of the mechanical fuel pump into the sump, then the sump goes to the TBI unit I have and there was also a return (from the overflow vent). I also have dual tanks- no issues...
  18. 77 K20

    NP 203 Shift pattern

    The LOC position actually locks the "center differential" (transfer case). The 203 was supposed to be a full time 4wd transfer case. If the transfer case locked the front and rear axles together then it would fight you when turning sharp as the front and rear drivelines need to turn at...
  19. 77 K20

    Tallest transmission tunnel?

    The 205 was clocked down a bit to lessen the driveline angle for the front driveshaft. With ORDs leaf springs when the front axle is dropped out it was a bad angle for the U-joint at the front diff. Having never had a 205 before this one it is kinda hard for me to know exactly. Here is a pic of...
  20. 77 K20

    Tallest transmission tunnel?

    I had a shop install my magnum doubler in my '77 K20 probably 2 years ago... should have done it myself. They used 2" square stock to drop the transfer case/doubler down from the frame. I don't like this. I have a rear driveline vibration now. Have to tilt the rear axle pinion down or raise the...
  21. 77 K20

    Differential skid plates

    I had bought one of these years ago- 4XDoctor diff guard I drive thru deep snow and can't see hidden items that will smack the differentials. Used it for a while then changed to a full aftermarket diff cover (Riddler). I liked the Riddler covers as they were very "smooth". Bolts were...
  22. 77 K20

    NP 205 rear output change from 1310 to 1350

    Another flange vote here.
  23. 77 K20

    Hello everyone I live in Needles

    Nice looking Suburban! I don't hear of Needles very often, and when I have for the last 40 years it is this:
  24. 77 K20

    Hello from Montana

    Nice truck! :welcome:
  25. 77 K20

    Seriously bummed with this drivetrain setup right now :(

    Driveline angle link I have Tom Wood's front and rear driveshafts (both new). He had this nice page where I had measured everything and then wrote it down. I then lost the paper and need to remeasure it. Might be useful for you.

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