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Author Topic:   Powerglide
doowchuck
Dirt Full Roller

Total posts: 45
posted July 05, 2001 05:28 PM
Ok here we go. I have A stock powerglide, removed the governor, drilled a 1/8 hole in the tube to the servo piston, drilled a 7/64 & 1/16 hole in the rear clutch piston. Reverse works fine but I have major slip in low.
What did I overlook?????????

jammin
Dirt Administrator

Total posts: 3279
posted July 05, 2001 09:11 PM UIN: 16262997
It is supposed to slip until you get the RPM's up enough for it to grab. Did you drill the 1/8 hole in the housing or the tube?

jammin

[This message has been edited by jammin (edited July 05, 2001).]

doowchuck
Dirt Full Roller

Total posts: 45
posted July 06, 2001 07:44 AM
The 1/8 hole is in the tube, same as some other powerglides that I have. Plenty of RPM. I have used these transmissions in the past and thought that I would do the modifications myself. Is there something else other than the holes that needs to be done?
Thanks John

jammin
Dirt Administrator

Total posts: 3279
posted July 06, 2001 12:35 PM UIN: 16262997
John, the one I built works fine. I think its the problem in the tube. I needs to be from the bottom of the housing up thru the outside of the servo piston bore to work correctly.

jammin

doowchuck
Dirt Full Roller

Total posts: 45
posted July 06, 2001 02:34 PM
Jammin, I have other p glides that I had done in a shop. They work with the hole in the tube fine. Shouldn't be any difference which place the hole is. Someone somewhere said the shift valve needs to be locked in the shift position??
I just think I am missing something in this deal.

jammin
Dirt Administrator

Total posts: 3279
posted July 06, 2001 06:07 PM UIN: 16262997
Well..the way I look at it, the pressure is bleeding off before it gets to the correct location, if you do it in the housing, it bleeds off after it gets to that location, you should also adjust your band a little tighter, and it will help you.

jammin
Dirt Administrator

Total posts: 3279
posted July 06, 2001 06:09 PM UIN: 16262997
One more note, I removed the governor and it didnt work at all......plugged holes. I bet one reason that your having problems is that. I put the governor back on so that the fluid could circulate thru it and it worked like a champ.

jammin

doowchuck
Dirt Full Roller

Total posts: 45
posted July 06, 2001 11:10 PM
Thanks for the governor tip, I will try that.
Can't be the hole location because it works with that on my other tranny's.
Thanks again John

doowchuck
Dirt Full Roller

Total posts: 45
posted July 07, 2001 02:33 PM
Jammin, thanks for the help. I put the governor back on and it works perfect now.
John

jammin
Dirt Administrator

Total posts: 3279
posted July 07, 2001 03:13 PM UIN: 16262997
Great. I think the reason is that there is mainline pressure going thru the governor and it has to be redirected back to the clutches for some reason. If I took a look at where to bypass it, I am sure it wouldnt be too hard, but I dont think it is worth the time it would take to find it. There isnt that much weight to be gained there.

jammin

jlfastride
Dirt Full Roller

Total posts: 27
posted July 08, 2001 11:37 AM
myself i simply tap and plug the 2 oil passage holes in the rear govornor housing works just fine bushore has a plate that they sanwich in there to do the same thing. gl jl

jammin
Dirt Administrator

Total posts: 3279
posted July 08, 2001 12:51 PM UIN: 16262997
Yup, it does the same thing, so why even mess with lines and ball valves? I will be building several of these trannies, they are easy to rebuild and are pretty inexpensive.

jlfastride
Dirt Full Roller

Total posts: 27
posted July 08, 2001 10:08 PM
here's two reasons i run the lines and valve myself 1) i can keep the tranny locked up in low gear preventing slippage,not a huge deal just my preferance and 2) i can air test the complete trans through the fitting in the pump with the valve body in place and everything. my personal insurance plan lol

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