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#636780 04/11/2010 11:20 PM
Joined: Jul 2005
Posts: 153
H
Wrench Fetcher
Wrench Fetcher
H Offline
Joined: Jul 2005
Posts: 153
I finally got my 70 gmc running. rebuilt 250 with langdon goodies and a rebulit powerglide. Problem is when I put the truck in gear the driveshaft inches forward but no rotation. eventually the wheels spin and then stop. Is this a torque converter issue? Does the rebulit trans need to build pressure? Help I am getting aggravated!

Mac

Joined: Nov 2005
Posts: 6,100
3
3B Offline
'Bolter
'Bolter
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Joined: Nov 2005
Posts: 6,100
Hy handymanmac, I don't quite understand your description of whats going on. Are you sure the tranny is full of fluid? Has the shift linkage been setup properly?

Joined: Mar 2004
Posts: 3,068
'Bolter
'Bolter
Joined: Mar 2004
Posts: 3,068
P/Glides need the torque converter filled before installation, they won't self-fill,
Scott


Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
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1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
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Joined: Jul 2005
Posts: 153
H
Wrench Fetcher
Wrench Fetcher
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Joined: Jul 2005
Posts: 153
I was wondering if it was the torque convereter not filled. Its been over a year but I swore I filled it. It looks like I may need to pull it!! Linkage and fluid level are both good!

Mac

Joined: Nov 2005
Posts: 6,100
3
3B Offline
'Bolter
'Bolter
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Joined: Nov 2005
Posts: 6,100
Hy handymanmac, I'm afraid I have to disagree with 48bigtrucks statement about the converter not self filling, I checked a couple of maintenance manuals just to be sure my memory was correct. The converter does self fill when the engine is running and the transmission pump is turning, fluid is constantly circulating in and out of the converter. The converter is the place in the transmission that generates the most heat into the fluid, if it didn't circulate through there it would burn in no time. You can prime the converter before installing it, but that is more to prevent dry start damage than it is to put the converters oil supply at a working level. It sounds like you have an internal transmission problem to me or a bad converter, if the linkage is correctly adjusted and the fluid level is correct when the tranny is warm, I would contact the tranny shop that rebuilt your tranny and explain the symptoms, and see if they can suggest anything else to check before you pull it. I had a shop rebuild a Hydramatic once, I changed it on the street in front of my parents house, and no go when it was installed. I called the shop, and they said to bring it back, so I took it out and took it back. They called the next day and said it was ready, so I asked what was wrong with it, after some back and forth the guy admitted that they had left out an oil distribution pipe when they assembled it.

Last edited by 3B; 04/12/2010 10:19 PM.
3B #637178 04/13/2010 2:43 AM
Joined: Jan 2004
Posts: 188
5
Shop Shark
Shop Shark
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Joined: Jan 2004
Posts: 188
If the converter is not filled, the pump can run to fill it.


Moderated by  Phak1, Woogeroo 

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