No gears in 4hi normal, but can put in 4hi lock and will drive

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#11

02-27-2023, 08:37 AM

Disel

Senior Member

Join Date: Jan 2023

Posts: 133

[QUOTE=TAINTER;398892]H3 front prop shafts have toophs? Please, show me where to look for the elusive driveshaft teeth... Are you talking about ring and pinion teeth?[/QUOTE
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#12

02-27-2023, 08:59 AM

Doc Olds

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Join Date: Jul 2007

Location: Boat Town USA MI

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Shafts have SPLINES, not teeth. Gears have teeth.

#13

02-27-2023, 09:38 PM

Disel

Senior Member

Join Date: Jan 2023

Posts: 133

Quote:

Originally Posted by Doc Olds

Shafts have SPLINES, not teeth. Gears have teeth.

I made a mistake. The front cardan is very weak for such a mass of the car (and the front axle). In the mountains it often breaks under load.

#14

03-01-2023, 01:45 PM

Pellicciokm

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Join Date: Feb 2023

Posts: 10

Update - I have NOT attempted this project yet. Hummer has just been sitting because I was stressed about it. Went to move it out of the drive way into the garage to start troubleshooting but it drove fine? Went into hear perfectly and drove with no issues. So now I'm even more confused. Could there me an issue with the shift motor going bad? Ant thoughts?