Author Topic: 205? transfer case problem  (Read 12969 times)

Offline gotsmeuhh350

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205? transfer case problem
« on: May 18, 2011, 11:58:25 pm »
My 86 k10 (350,700r4/205) has an issue with the transfer case and its been driving me crazy. I believe its a np205, as its not full time 4x4. (havent had the time to crawl under it) What happens is if im driving and i have to hit the brakes hard, it makes a quiet ticking sound, not very loud, but just noticable.
And it puts the transfer case into neutral. the transfer case shifter doesnt move, so it switches gears internally. i can give it as much gas as i want and it wont go anywhere. i can put the tranny in any gear, and nothing happens. until i go through all of the gears in the transfer case. then i put the truck in drive, and itll drive again. it makes me angry, because if a guy in front of me hits his brakes hard, and i have to stop, i have to pull over, put the truck in neutral, shut it off, go through the transfer case gears, start it up, and then drive. it would really help me out if anyone could figure this out, because im stumped. should i just look for a new transfer case? get this one rebuilt? i have no idea. or is it  something that can be fixed?
« Last Edit: May 19, 2011, 12:00:02 am by gotsmeuhh350 »
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project

Offline 76k104x4

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Re: 205? transfer case problem
« Reply #1 on: May 19, 2011, 03:58:34 am »
i had that problem with a 208 in my old 82 but i totaled the truck before i could fix it

Offline Irish_Alley

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Re: 205? transfer case problem
« Reply #2 on: May 19, 2011, 09:54:14 am »
to me sounds like a rebuild or swap it out.
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline gotsmeuhh350

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Re: 205? transfer case problem
« Reply #3 on: May 19, 2011, 12:41:17 pm »
yay. lol. my truck doesnt have back brakes if that helps.
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project

Offline bake74

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Re: 205? transfer case problem
« Reply #4 on: May 24, 2011, 06:59:45 pm »
     You need to crawl under and look at the transfer case and yolk.  I am wondering if when you stop quick the mounts are not that good and it is flexing, also make sure your rod that shifts is not weak and maybe flexing, otherwise I am with everyone else, time for a rebuild.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
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Offline 1979C20

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Re: 205? transfer case problem
« Reply #5 on: May 25, 2011, 02:51:31 am »
Youre sure the shifter doesnt move? You may need to check the shift linkage for any slop and also make sure the shifter isnt hitting the hole in the floor
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline Irish_Alley

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Re: 205? transfer case problem
« Reply #6 on: May 25, 2011, 03:51:57 am »
if it did pop out why would he have to cycle threw the gears in order for it to find a gear? I could understand if he just had to select a gear and go but why find all gears before he can go
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline gotsmeuhh350

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Re: 205? transfer case problem
« Reply #7 on: May 27, 2011, 07:45:29 pm »
im positive it doesnt move. it happend twice today also. im not sure what is wrong with it,
but ill check all the linkage tomorrow. thanks.
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project

Offline 1979C20

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Re: 205? transfer case problem
« Reply #8 on: May 28, 2011, 03:06:05 am »
Sounds like maybe the internal shifter fork is going out. Maybe the shifter fork roll pin is letting go? And it may also be the shift rail(s) being worn out and making it pop out of gear  on the top of your transfer case there is a bolt(not sure if theres two) and under the bolt is a spring and a ball bearing. Thats your detent ball, it rests on the 3 groves of the shift rail and it helps keep it from moving when its in gear. That spring could be warn or maybe even missing. And the 3 grooves(hi, neutral, low) could be wearing down causing it to pop out of gear.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline gotsmeuhh350

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Re: 205? transfer case problem
« Reply #9 on: May 28, 2011, 09:23:18 pm »
is that something i can check while its still in the truck, or will i have to drop it and check it out? i mean the detent ball, not the shifter fork.
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project

Offline 1979C20

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Re: 205? transfer case problem
« Reply #10 on: May 28, 2011, 10:12:02 pm »
The detebt ball, possibly. Its on the top of the transfer case about the shift rod that is closest to the input shaft. You can probably get to it by pulling the floor/doghouse. And the shift rail and shifter fork, no. Youd have to drop the transfer case because the tranny will interfere with removing it.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline gotsmeuhh350

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Re: 205? transfer case problem
« Reply #11 on: May 30, 2011, 11:02:30 pm »
alright. ill take a look at that tomorrow morning.
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project

Offline topp

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Re: 205? transfer case problem
« Reply #12 on: May 31, 2011, 01:18:38 am »
Uhm...Unless a PO or you did a swap, an '86 should have a NP 208 Transfer case...

'90 Suburban TBI 350

Offline 76k104x4

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Re: 205? transfer case problem
« Reply #13 on: May 31, 2011, 10:23:11 pm »
if its a 208 id definatly just pull it its pretty light compared to a 205

Offline gotsmeuhh350

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Re: 205? transfer case problem
« Reply #14 on: June 02, 2011, 02:51:18 pm »
ohh. well it must be. i havent been able to crawl under and check because its either been raining, or its been muddy. i really cant have my truck down for more than a day at a time, but how hard is it to drop a 208? if i can find one at a junk yard, i can rebuild it and replace mine. does anyone know of a good rebuild kit that wont empty my wallet? thanks
« Last Edit: June 02, 2011, 02:54:19 pm by gotsmeuhh350 »
87 V10, 350 T350, 2 3/4 stacks, stock tbi (sold)
86 K10, 350 T350, headers, edelbrock carb, duals (scrapped)
86 C10, rust free roller, (sold)
86 C15, 305 700r4, stock. everything. daily driver/project