What the (&^% is going on here?????????????

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What the (&^% is going on here?????????????

Postby Pool Man » Sun Sep 30, 2007 8:07 am

Brian broke his trans case a few weekends ago. Put all the guts into another glide housing along with new bands and pump. Car seems to want to rock forwards and thing back once before settling down on the button. I have adjusted the bands. Seems to be fine one pass and then go you know where the next. Any suggestions on what to look for? Will do a pressure test hopefully today or tomorrow. smiley-help
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Postby Steve from Pa » Sun Sep 30, 2007 9:14 am

Yep it sounds like too low line pressure.
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Postby Pool Man » Sun Sep 30, 2007 6:04 pm

I know of some things that could be wrong. Anyone care to help with things to look at/or for?
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Postby andyval » Sun Sep 30, 2007 10:31 pm

Go on DRR and give transman a shout. He will know.
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Postby drags3078 » Mon Oct 01, 2007 12:07 am

DRR's trans man would definetly know !!...... my hunch is {and its been awhile since I been in a powerglide} is that the reverse is slower to apply than first ....... causing it to rock foward first then lock ...... reverse unit might have a sealing ring leaking or/and lip seal leaking a little making it slow compared to first gear ...... the trans brake holds first and reverse to lock ....... a pressure test would be best if unit is complete ...... other wise a air test with the valve body might be in order, if pressure test good maybe some dirt in the valve body that pertain to first and reverse .... I have some books at the shop I will look up for you tomorrow
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Postby 3dracing » Mon Oct 01, 2007 9:55 am

Rondoyou know what busted the case? It sounds like a pressure problem the case may have a crack in it also.


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Postby Pool Man » Mon Oct 01, 2007 5:05 pm

Steve, i sure do know. It was tire shake. This is a case Brian bought to put the parts into from the old case.
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Postby TS403C » Mon Oct 01, 2007 5:13 pm

Your front pump is your problem. If your pump gears have more than .003 clearence, then you will not build up enough line pressure at idle. Take your front pump apart. Lay the side that holds the gears upright and measure how far the gears go down into the pump. If you have extra gears laying around, you can try and find thicker ones. Hope this helps.
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Postby Steve from Pa » Mon Oct 01, 2007 5:44 pm

Steve, i sure do know. It was tire shake.

Was it from the burnout or is it shaking on launch?

I'd like to help you on the pressure problem but I have a friend that is very good with glides .........thus I don't know anything about them.

....and yes I agree Steve Oldani is the man when it comes to problems with a glide.

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Postby TS403C » Tue Oct 02, 2007 1:38 am

Pool Man, one more item. When you put your parts into the new case, did you put it in a Dedenbear case or a stock case? If it was a stock case, you would have to modify the governor support (drilling hole) and also where the valve body would bolt up too. If you have a stock case, then I would suggest taking your trans to a good trans person and have these modifications done.
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Postby Pool Man » Tue Oct 02, 2007 7:13 am

TS403C wrote:Your front pump is your problem. If your pump gears have more than .003 clearence, then you will not build up enough line pressure.


We put a new pump in. If the pump was the cause, couldnt you just bring the idle up and build pressure? We are bringing the RPM's up to 1500 prior to stagging. Sometimes it will do and other times it is fine. Very inconsistant on when and how much it does it. Yes, it was a stock case and it was drilled. We will probably order a new ATI case today.
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Postby 3dracing » Tue Oct 02, 2007 10:20 am

Ron we had one that did similar things but some time during the night it would not shift also. We changed cases and it cleared up. You can't go wrong with an aftermarket case it may solve your problem.


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Postby 3dracing » Tue Oct 02, 2007 10:23 am

Did you put a new pump or a reconditioned pump in it? Wegot a re-done pump from one supplier and the gears were too thick they ate up the cover and did similar things like yours is doing.


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Postby June » Tue Oct 02, 2007 2:57 pm

since your talking about transmissions can I ask if the trans or converter will cause the tire shake? we have had a tire shake problem on the burnout for some time now.
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Postby TS403C » Tue Oct 02, 2007 4:40 pm

More than likely you do not have enough wheel speed after leaving the water box or your 4-link is set up for too much bite.
Harold Snyder
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2013 SWJDS 12-17 Age Group Champion
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Postby TS403C » Tue Oct 02, 2007 4:44 pm

Pool Man, sometimes 1500 rpm is still not enough if the front pump is weak. I've had to go to 2500 rpm's a few times to get the car to stage.
Harold Snyder
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IHRA Top Sportsman #403C finished #4 in 2008 and
crew chief for my son's 7.90 car #4165
2011 IHRA JR Masters 7.90 Div.4 Champion
2013 SWJDS 12-17 Age Group Champion
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Postby drags3078 » Tue Oct 02, 2007 5:25 pm

is it a full tree brake or pro tree brake ????


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Postby Steve from Pa » Tue Oct 30, 2007 7:13 pm

I was just looking around and ran across this post again....what was the problem Ron?
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