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2nd blazer same problem when stopping

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **DONOTDELETE**, Apr 5, 2001.

    When i come to a stop in may 89 the back end seems kinda tight or something, when i take my foot off the break the back end makes a little noise and seems to drop down just a bit, then when i give it gas it makes the same noise and the back end seems to drop down a little more. My 84 did the same thing. Both have mild lift kits. My u joints are always in good shape. Does anybody have a similar problem.
     
  1. Emmettology 101

    Emmettology 101 3/4 ton status

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    Have you checked your Ubolts? To make sure they are tight?


    <font color=green><A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A></font color=green>[​IMG]
     
  2. u joints are new
     
  3. 89Blazin

    89Blazin 1/2 ton status

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    Mine's startin to do it a little....the shakle is sticking. Comin to a stop makes it move, and it is not moving free enough. You let off the brake and it "pops" back into place.

    85 Burb and an 89 Blazer
    One just for fun, one simply for pleazer
     
  4. Bondo

    Bondo 1/2 ton status

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    My '90 started doing the same thing about a month ago. It's annoying but I haven't had a chance to look at it yet. What's the best way to fix it?

    BONDO WILL FIX ANYTHING!!!
     
  5. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    The noise is the yolk on the driveshaft that connects to the output shaft of the trans. Take out the driveshaft to the rear axle, and check for any big burs on the output shaft and on the inside spined part of the yolk. Then grease the inside splined part, and put it back on. I took mine to the dealer for this same issue, and they charged my $150 to grease the damn thing, and it never popped or jumped again! Good Luck! Let me know if this helps you!

    <font color=red> Check out my rig @ </font color=red>
    <A target="_blank" HREF=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</A> [​IMG]
    <font color=red> I Love My Blazer! </font color=red>
     
  6. ftn96

    ftn96 1/2 ton status

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    Mine has been doing the same thing since I bought it. Then I found out by mistale or chance, that after I replaced my driveshaft I THOUGHT the problem was the ears on the back of the driveshaft being wollowed out was the problem, cuase after the new one was installed no more butt banging after letting off the brakes after a stop. Then I go an rebuild the rear end, and I have everything apart for a few days, OK a week. then I get it all back together, Then I'll be GD its back. I went back and checked the u-bolts, u everything, R&P, everything looks good.

    Also It does it more so when its cold, IE on the first few miles, then it lessens as I go throughout the day. But never completely goes away. I also found that if you put it in Neutral as you come to a stop it doesn't do it AT ALL.

    So the shackle releasing sounds good but I dont know, and I have heard about the special GM lube for the output shaft spline and driveshaft yoke splines. But I haven't tried this yet.

    Can we all come together and put this BUG to rest?????

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  7. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    I swear to god... I had to at a later date, actually take a jewlers file (small triangle shaped file) and grind off a few burrs from the output shaft of the trans, and there was one bad one on the yolk too. Take a look, I bet you find the same on yours.

    I would put a 6 pack on it! I'm telling you, there is something sticking at that point. Take it off and look, it only take a few seconds to pull the driveshaft anyhow... And YES, it makes a difference if in nuetral... it has something to do with the way the axle loads and unloads pressure from the yolk. IE: stopping pulls the shaft until stops, and then pushes back hard when the weight of the truck settles back. THUS STICKING THE DAMN THING (NO NOISE). Then the truck settles as you creep waiting for the light to change, AND *BUMP* there it goes. Mine was bad when cold too... just trying to help, but I am sure this is your problem.

    <font color=red> Check out my rig @ </font color=red>
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  8. ftn96

    ftn96 1/2 ton status

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    Easy killer. I believe you enuff that Im gonna check it out this weekend. It shouldnt be anything other than what we have al discussed here. It just seems to be a wierd little quirk that has been hard to pin point. I've got 2 of those files. They are great for fixing threads. What kind of lube did you use on yours? that GM $$$$$ stuff or something like HI-Temp wheel bearing grease?

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  9. thanks all. I will check out the spline and shackles this weekend and let everybody know
     
  10. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Sorry, I guess I got a little excited huh?? :)

    Anyhow, I used white lithium grease, and I replaced the rear seal on the trans too. GM used the crazy expensive crap the first time, but it didn't work too well as the noise came back. Good luck!

    <font color=red> Check out my rig @ </font color=red>
    <A target="_blank" HREF=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</A> [​IMG]
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  11. ftn96

    ftn96 1/2 ton status

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    Lucky me. I just replaced the output shaft seal and just got some White Lith grease for setting up ring and pinions. this is too coinsadental. This is a good sign.

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  12. lehtola

    lehtola 1/2 ton status

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    Hmmm...same problem here...good to have support like you all.

    1990 GMC Jimmy 350/TH700R4/NP241/10 bolts, 4" skyjacker lift, 35x12.50R15 BFG All Terrains on 15x10 AR Baja's, Flowmasters.
     
  13. ftn96

    ftn96 1/2 ton status

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    I hope thi sworks. I'll send you a six pack if that is indeed the fix, SH$T, I'll send you a 12 pack. I'll even make sure the born on date is current. LMFAO!!!!!

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  14. arq

    arq 1/2 ton status

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    may want to also check the rear bushings, shakles, and make sure your leafs are tightly screwed on.

    ARQ.
     
  15. 1big78k5

    1big78k5 Registered Member

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    I have been having the same problem with my k5, but the problem I found was that the rear drums had a grove and were worn out pretty good. What was happening when I stopped was one of the rear brake shoes was hanging up in the drum and causing that bumping p[roblem when I stopped. I could actually see the transfer case shifter drop back down when I took off again. It was dropping when the brake shoe unbound from the groove in the drum! I put new drums and shoes on and I have not had a problem since! I'm just letting you know because I have had the same problem but my transfer case does not have a slip yoke to have the problem so you never know!

    '78 k5 sb400, th350, np203, 35" swampers
     
  16. jarheadk5

    jarheadk5 1/2 ton status

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    Mine did that too. It stopped when I replaced my rear u-joints. But it's starting to happen again 'cause my u-joints are shot already. No suspension lift, but there's some kind of problem back there...

    [​IMG] Semper Maintenance!
     
  17. ftn96

    ftn96 1/2 ton status

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    As far as the brake thing goes, that is the first thing I checked. That wasn't the problem.
    And Jarhead...... I have thought about that too.

    Heres my plan of attack. Im gonna grease the crap out of the splines first and see if that works, if not... #2 I will replace the u-joints... if not, #3 I will double check the revolver shackles in the rear.
    If none of the above works, Im gonna blow this mother up.

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  18. 89Blazin

    89Blazin 1/2 ton status

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    I'm doin the shakles after I check the brake drums out. Just bought this one a couple months ago, and haven't inspected rear brakes. Mine seems particular to the driver's side rear. Pulling the rear wheels and drums tomorrow and have a look-see.


    85 Burb and an 89 Blazer
    One just for fun, one simply for pleazer
     
  19. ftn96

    ftn96 1/2 ton status

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    Well, I just pulled my driveshaft and lubed the splines of the yoke with white lithium grease and took it for a test drive and
    WOOOOOOOOOOOOOOOOOOO HOOOOOOOOOOOOOO!!!
    No more clunking..............

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     

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