differential

  1. M

    Read differential leak

    Changed the diff. fluid in my C1500 with the G80 (wasn’t leaking). Removed all gasket residue with alcohol and a Brillo pad until bare metal on both mating surfaces, made sure both were clean and dry. Used Permarx Right Stuff 90 minute cure time. Applied, mated the surfaces with finger tight...
  2. HeavyChevyShtbox

    Confused on my rear end

    I have a 91 k2500 HD 7.4/4l80 (8600 8 lug) and I did a diff service last weekend and I realized that I may not have the rear end i thought, it doesn’t look like a g80 (where you can see the spiders) it instead is fully enclosed and has 3 pairs of rods going horizontal that are each about 3/4-1...
  3. M

    Help with replacement np241

    I could use some advice on the wiring involved in the np241. I have a 1998 k1500 and I had my TC go out so I bought a replacement np241 off marketplace. When I removed my case I found that the input shafts were different so I took both apart and swapped them. After putting it back together and...
  4. Gravis

    Whirring between 40 and 60mph - 1997 GMC suburban SLT K1500 5.7L

    So here we are. Brand new drum brakes, new Yukon gear and axle 373 posi, and new bearings. Bear with me here, folks. I am hearing a resonating hum between 45 and 60 mph. It is higher pitched at 60, then dulls, and appears again in the mid 40s mph. This is mostly coasting, but can be...
  5. offroadtahoe

    9.25 IFS Conversion 0-3" lift

    to convert to a 9.25 on a stock or cranked 3" lift truck I'm sure you can use a diff drop kit and modify it,I tried it but you would have to shave the diff side fins a little bit like they do on the 8.25,and it just hangs too low since its already bigger.i didn't like this route so i went...
  6. N

    Differential housing chipped?

    Hey all, new to the forum. Wanted to know if anyone has seen this before and what it means. Can't find a similar issue online anywhere. I'm rebuilding a '98 1500 2WD and opened my diff housing to find what appears to be chipping where the bearings sit? This is at the end of the axle tube, just...
  7. Crankshaft Brad

    10 Bolt to 14 Bolt Full Floater Swap

    First, I apologize in advance for my ignorance. After changing the leaf springs on my 91’ 1500 this weekend, I now have a leaking axle tube. The junk from the roads over the past 30 years had collected in the lower plate that bolts to the axle. When I had to pull the plate off to change the...
  8. Buick

    99 Suburban Highway Rumble

    Hey Guys, been a LONG time lurker on this forum, but I'm finally at wits end with my '99 K1500 Suburban. At highway speeds, between roughly 65-75MPH, there is a pronounced low frequency rumble. It is pretty loud, but difficult to determine where on the vehicle its coming from. Along with the...
    • Buick
    • Thread
    • differential driveline noise driveline vibration driveshaft highway rumble highway vibration rumble ujoints vibration
    • Replies: 21
    • Forum: Engine Performance + Maintenance
  9. David Orum

    Rear end id? please help.

    Hello I have a 1999 Chevrolet Tahoe 2 dr, 2wd, vortec 350. i have made some improvements to the engine and now i want to add a locker to the rear end, BUT i am lost! i really cant identify the rear end in this thing. does anybody know which rear end this is? the cover says Spicer on it. Pic...
  10. C

    Nbs rear end swap questions

    So I'm brand new to this forum so I apologize in advance if I'm posting this in the wrong section but I'm curious on whats involved in a nbs rear end swap . I've looked online and I can't find any definitive info on it . So here are my questions. How different are the track widths . Want to...
  11. Brantly

    Front differential swap

    I bought a 8.25" from a 1992 k1500 PU to put into my 1998 k1500 PU because the gears match my rear. I realized after buying it that the 92' diff that i bought has what i believe to be a thermal actuator or some kind of actuator that my stock 98' differential does not have which means there is an...

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