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Author Topic:   Breaking PG cases
jdj9410
Member
posted June 28, 2003 09:45 AM
Have broken second case this year. Both times on tacky fast track. First time track was rough and tacky, thought that was it. This time it was smooth and tacky. First trans broke just in front of where tailshaft and case go together on main case. This time 3-4 inches forward of that. Both times cracked all the way around. Rear support bushing good in both times. Don't use a crossmember (supposed to break cases according to book). Replaced U-joint after first one. No vibrations or anything. Don't even know it's broke till try to back car up, then it leaks. On tape looks like it might be happening right in middle of turn becuae of puff of white smoke.

[This message has been edited by jdj9410 (edited June 28, 2003).]

jammin
Administrator
posted June 28, 2003 10:01 AM
Driveshaft bottoming out?

jammin

jdj9410
Member
posted June 28, 2003 10:20 AM
1 1/2 inch clearance on it, no marks on tail shaft or slip yoke outside. No marks on output shaft or inside of slide yoke either.

[This message has been edited by jdj9410 (edited June 28, 2003).]

[This message has been edited by jdj9410 (edited June 28, 2003).]

Tim Weiss
Member
posted June 28, 2003 10:38 AM
Did you make the driveshaft? Ihave been told it needs balanced we have made all of ours with no problems till we went to a powerglide although we have broken just one case and it could have been the rough track last week the rear seal and tailshaft bushing came out. one of these days we will find the money for a bert or brinn maybe a falcon. good luck


fastow
Member
posted June 28, 2003 05:36 PM
No vibration. Only does it on tacky. Been checking things to do with rearend wrap or the spring torque arm. On dryslick the torque link indicator travels about 2 inches, on tacky travel about 3 inches. Removed the link and rotated the rearend to check for anything binding or running out. Can't find anything hitting. Going to have shaft balanced and try the Burt Brown support kit. Guess maybe just the weight of it hanging in combination with high banked turns might be causing it. Really hooking up hard and slamming into the turns when tacky. Thanks for the ideas and info.


PEDDLER
Member
posted June 29, 2003 08:59 AM
Something to look for..........

1.Make sure, if you are running a motor plate or mid plate, that the alignment pins are long enough and extend into the transmission housing.
2. Go the Chevrolet and get the correct case to block bolts as they have a small sholder on them that keeps the transmission from squirming on the block.

We had the same problem several years ago and our transmission man reccomended the above and it stopped our problem.

The Peddler

[IMG]

Alltel
Member
posted June 29, 2003 04:05 PM
Motor Mounts? It could be a number of things.

jammin

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[This message has been edited by jammin (edited June 29, 2003).]

racnfool
Member
posted June 30, 2003 08:47 AM
I had the same problems last year and finally broke down and bought a Brinn. It was the best thing I ever did. For what ever reason on a tacky track my powerglides would break in the exact same spots. And like yours i wouldent know until i put it in reverse. We did loose one on the track and man it made a mess. I just dont think a 40 year old tranny will work anymore in a 600 hp car on hoosiers. You will spend less money in the long run going to a Brinn or something like it. I wish I would have did it from the start. Good Luck


dirtbuster
Member
posted June 30, 2003 10:06 AM
get a brinn, bert etc and forget about it. We went through the same thing breaking cases. usually go through about 2-3 a year at 700$ ea. Went to a Brinn and haven't touched it for 3 years. Change fluid every other night and run it. I think you can get one for around $12-1300 now and if you get the brinn bellhousing and starter you are still under about $1800. Saved us money in 1 year, let alone over 3 years and going.


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