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Old 08-30-2003, 01:18 AM
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Governor?

A buddy of mine has an '82 Blazer with a '73 Buick 350 and a TH350 out of who-knows-what ;-) It is 4wd, BTW.

Anyway, we were on the dunes last weekend, had to turn it around on an incline, pulled it out of reverse and into drive preparing to go back up the hill. He gave it some gas, the truck lurched forward about a half-inch, then we heard a nice little "ting!" of metal snapping and then it had no forward.

Played around with it a little, here's what it does: won't start out in drive or second, but you can start out in 1st and manually up shift without a problem. Once you come to a stop, you have to pull the lever back in to 1st and up shift manually again. Reverse works just fine. They just drained the pan today and while the filter looked a little gunky, the fluid was pretty clean and didn't have any metal or clutch material in it.

They replaced the vacuum modulator but that didn't seem to have a problem, now I'm thinking it's the governor. What do you all think?

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Old 08-30-2003, 01:26 AM
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Sounds like a broken low roller clutch to me. From what you explained it does not sound governor related but I guess it could be.
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Old 08-30-2003, 08:57 AM
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Cool

as mentioned , the center support or the roller clutch broke.

when you shift to manual low, the reverse/low frictions apply and provide holding power to move the vehicle forward.

In 4x4 situations I would advise my customers to shift to low gear at slow , tight spots to avoid this problem.

the gov, modulator, shift linkage, fluid level have nothing to do with this malfunction you are reporting.


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Old 08-30-2003, 09:55 AM
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That would be the 'Ting' you heard.
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Old 08-30-2003, 12:15 PM
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Thanks for the replies, however depressing they may be
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Old 08-30-2003, 05:11 PM
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Here's something (grasping at straws, I know...) It does shift itself automatically between second and third. When it's ready for second gear, you can toss it up to third and it will shift to second, then third automatically. It will also downshift to second gear from third (I didn't know this before I posted, sorry.)

But from what Crosley said, it still sounds like the roller clutch because you can't start out in any gear but 1st :-(
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Old 08-30-2003, 10:15 PM
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Cool

If I am understanding your comments;


the govenor function has nothing to do with the center support and the roller clutch inside of it.

the roller clutch provides the holding power to move the vehicle forward in the "D" position on the shifter.

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Old 08-30-2003, 10:54 PM
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I realize it's not the governor, I was just putting that detail in there.
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Old 08-31-2003, 08:11 AM
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Cool

I apologize if you thought I was being flip,

so often the un-educated person on these slush box trannys cling to the hope that if they change the oil and walk 3 times around the vehicle backwards with their arms in the air that all will be well.

And I must admit sometimes a fluid service will help.

I told a co-woker 2 years ago to add a quart of 10w-30 motor oil to his Nissan FWD car's trans axle that had morning sickness ( hard internal seals) . The car worked great for about 6 months more then the tranny finally puked.




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Old 08-31-2003, 12:34 PM
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LOL, no problem man, really glad for the response.
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Old 09-05-2003, 02:54 AM
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Thought I'd update this, you guys were dead on the money. The roller clutch center support did, in fact, have a big huge crack through it allowing it the roller clutch to spin both directions.

We tore the tranny down, rebuilt it, goes back in the truck on Saturday. Thanks again!
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Old 09-05-2003, 08:15 AM
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Quote:
Originally posted by mr_josh
Thought I'd update this, you guys were dead on the money. The roller clutch center support did, in fact, have a big huge crack through it allowing it the roller clutch to spin both directions.

We tore the tranny down, rebuilt it, goes back in the truck on Saturday. Thanks again!

========= I am glad it worked out for you.

now I need to print this out for more ppl to see... LOL


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