4wd problems on my 93 H1

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4wd problems on my 93 H1

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4wd problems on my 93 H1 - 8/31/2008 9:27:09 AM

Todd

Posts: 28
Joined: 6/2/2008
Status: offline

My 4wd drive hasn''t worked for a couple weeks but I haven''t needed it, but we just got a lot of rain at the ranch and I need 4wd. I checked all the fuses and its plugged in but its not engaging. A while back I got stuck pretty bad and heard a loud pop and it hasn''t worked since. Also since then its constantly says T/C locked in H/L H & L actually now that I think of it, it doesn''t even work in H just H/L or L which that is when the T/C is locked.

What do you guys suggest? Any ideas?

Thanks

Post #: 1

RE: 4wd problems on my 93 H1 - 8/31/2008 9:35:21 AM

phazer42

Posts: 170
Joined: 4/29/2008
Status: offline

sounds like you broke a half-shaft

it won''t work because when the t-case is in H, the power goes to the path of least resistance.... which means th one with the broken shaft.... when you put it in HL or L it locks the output so the front and rear get the same power.....

sounds like you need a new halfshaft....

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(in reply to Todd)

Post #: 2

RE: 4wd problems on my 93 H1 - 8/31/2008 9:46:18 AM

Todd

Posts: 28
Joined: 6/2/2008
Status: offline

Thanks for the reply.

These Hummers are spanish to me, does a half shaft require a t-case rebuild? It still delivers good power to the rear wheels but the front gets nothing. So by locking the t/c it will allow it to work?

(in reply to phazer42)

Post #: 3

RE: 4wd problems on my 93 H1 - 8/31/2008 12:26:36 PM

Todd

Posts: 28
Joined: 6/2/2008
Status: offline

quote:

ORIGINAL: phazer42

sounds like you broke a half-shaft

it won''''t work because when the t-case is in H, the power goes to the path of least resistance.... which means th one with the broken shaft.... when you put it in HL or L it locks the output so the front and rear get the same power.....

sounds like you need a new halfshaft....

You are exactly correct. My driver front half shaft is snapped in two near the brake.

Thanks!

(in reply to phazer42)

Post #: 4

RE: 4wd problems on my 93 H1 - 8/31/2008 10:43:59 PM

3hummers

Posts: 11819
Joined: 9/23/2007
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and your TC should be fine unless you did something else to it.

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2006 H1 Alpha wagon
2000 H1 Slantback
1997 H1 wagon
2008 H3 Alpha

(in reply to Todd)

Post #: 5

RE: 4wd problems on my 93 H1 - 9/1/2008 9:06:22 PM

Todd

Posts: 28
Joined: 6/2/2008
Status: offline

I ordered all the parts to fix it yesterday. Now I need to add ball joints to the list. I blew out an upper ball joint today.

(in reply to 3hummers)

Post #: 6

RE: 4wd problems on my 93 H1 - 9/2/2008 7:36:36 AM

phazer42

Posts: 170
Joined: 4/29/2008
Status: offline

I hope you aren''t driving it on pavement while the truck is in lock..... that will evenually require a t/c rebuild.....

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Post #: 7

RE: 4wd problems on my 93 H1 - 9/2/2008 8:13:23 AM

Todd

Posts: 28
Joined: 6/2/2008
Status: offline

Just a little pavement time.

(in reply to phazer42)

Post #: 8

RE: 4wd problems on my 93 H1 - 9/2/2008 9:26:56 AM

hummech

Posts: 57
Joined: 4/29/2008
Status: offline

the 93 Hummer h1''s had lite duty halfshafts in them so you are mosy likely going to be getting the newer heavy duty one. the halfshafts were built in as the weak link to break when a tire is spinning and hard brake pressure is applied. the tire weighs over 100 lbs and the brakes are inboard, so when you apply the brakes the drive line stops and the tire tries to keep spinning and snap goes the halfshaft.
just so preventive advise.

(in reply to Todd)

Post #: 9