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Author Topic:   More powerglide problems
Tim Weiss
Member
posted June 12, 2003 07:55 PM
Well now our other powerglide is burning up it happened two weeks in a row it is a direct drive just put it back in run it down the road for five minutes so hot you can barely touch it just put new clutches and pump in it we do not run a cooler never have never had problems before any ideas on this one


BayouGent
Member
posted June 13, 2003 12:57 AM
Tim do you run the glide in low or high gear? When you tore it down did you notice any areas that you could have missed installing a brass washer or flat needle bearing? How are you setting the tension on your band? The clutches at the rear of the transmission affect reverse only. Low gear is the band and planetary gear assembly. High gear is enclosed in the high gear clutch drum that the band wraps around. We run a glide with direct drive also. We chose to run a cooler but I know some racers who do not. I have high pressure hoses tapped into the pump through a ball valve to bypass oil while shifting the car. Give me all the info you can and I'll do my best to help you. I build all of my own transmissions and the worst thing I have go wrong on a glide is an occasional worn out band from slipping it during take off and using reverse. Let me know what groove the clip on the pump drive coupler is in. There should be 3 grooves on it.


Tim Weiss
Member
posted June 13, 2003 06:42 AM
We are not rebiulding them ourselves just trying help out rebiulder We do run in high gear. We were running clip in middle groove with engine plate now switched to spacer on crank 1/8 to 1/4 play I will relay reply to our builder Thanks for your help


BayouGent
Member
posted June 15, 2003 04:29 AM
We run in low gear but they will work just as well in high gear if you've got the rear gear at the final drive ratio you want. Not trying to insult your tranny builder or anything, but ask him to make sure that the band is adjusted correctly. Proper setting is tightening center bolt to 12 inch pounds and then backing off three full turns. Then lock down locking nut without turning the center bolt. If that band can't back off far enough of the high gear clutch drum when you're in high gear it will drag and create excessive heat on the drum, which will burn up clutches in a hurry. You might want to consider a billet clutch hub for the high gear if you aren't running one already. Those stock hubs aren't the strongest. I also recommend a hardened input shaft as well. Hope this helps you.


Tim Weiss
Member
posted June 15, 2003 07:45 AM
Thanks I will check that.


Tim Weiss
Member
posted June 15, 2003 07:48 PM
Bayuogent, We checked out the 12" lbs it was closer to 5 rounds out reset it to 3 rounds I dont think that was our problem any more suggestions Thanks for the help


BayouGent
Member
posted June 15, 2003 10:24 PM
I know you said that the transmission was burning up, but do you mean that it is burning up the clutches or just that it is getting hot? We run a cooler on ours, and I've never really tried to touch it after a race. I do know that they get hot because they weren't designed to run under the stress that dirt track racing will create. If the clutches aren't burning up it's possible that the temp is ok. Is the case still vented at the top? Are you blowing any fluid out of the vent? If slipage is a problem oil pressure could be a problem too. I did read where ya'll have installed the wrong gasket on the tailshaft section so I'm wondering if the valve body gaskets might not be the correct ones. Most powerglide gasket sets I get have both sets of gaskets for the different valve bodies. Most of the time when you seperate the valve bodies you can see the pattern of the old gasket, which may help you in checking that to. The differences are minor so it's easy to make a mistake with those. Just a few more things to check. I'm not an expert with 'em but I've gotten ours working pretty good.


Tim Weiss
Member
posted June 16, 2003 08:08 AM
This is a different tranny then the other post and yes it is burning up clutches.It has done it twice now. We changed it between heat and feature it was blistering hot then. Got it rebuilt put it back in and run it down the road about a mile and it was pretty hot so we took it back out and put the other one in.It does not blow oil out of the breather. With the other tranny powerglides had it right the hole in the back of the tranny was in the wrong place. I want to thank you all again for your help. I hope we can fix our latest problem.


powerglides
Member
posted June 16, 2003 03:14 PM
Put the rear on jack stands. Remove the plug in the three bolt cover on the right side. thread in a pressure gage with a capacity of at least 200lb. A grease gun hose will work between gage and port (1/8 pipe). Start car put it in low and bring rpm to 1800 or so. the gage should read at least 110lb with a stock pressure regulator spring. With an aftermarket spring the gage should read at least 150-170lb. If the pressure is low the pump or PR circut may be worn out.

[This message has been edited by powerglides (edited June 16, 2003).]

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