ezrider01

Hey there, so I wanted to get some dialogue going on my sluggish window issue as well.

I have put a new motor on the passenger side with no difference in performance. o I didn't other changing the driver side motor at that point. I have removed and cleaned all the window crank assemblies and greased them as well...no improvement. I am wondering if the power window relay could be causing this. The pass and driver side both work from the switch but are very slow and weak.

This is on a 1977 late design.

I welcome all thoughts of wisdom.

LS4 PILOT

I have heard the assist spring in the regulator gets weak , this spring helps the motor lift the window.

Also.....I have taken pwr window motor apart , cleaned the brushes and commutator ....this has helped....got the old hard grease out ...relube ....might help and might not

I suspect the regulator spring ......see what others say

Tell us what you wind up doing.

J.D.78

I have similar issue on my 78. Windows go down fast and go up slow. And I mean sloooooow

std1940

I had the same problem when installed new motors.
Tried new relay and new switchers.
Still very slow.
It turned out to be a weak battery.
I installed a new battery and now they are fast beyond expectations!
Tom.

ezrider01

Will do...thanks!

ezrider01

WOW!!!! That was lucky for you. I have new switches, new battery fully holding charge...have not changed relay yet. Probably need to start there????

ezrider01

Stay tuned...I'll keep you all posted on my own slow process.

commander_47

If you go the door, replace the assist spring. Especially with a new motor.

Those springs wear out even though they may look good.

ezrider01

So I have taken the power window motor apart, cleaned and lubed the guts...but you mention "the brushes and commutator"...I'm not familiar with the names, are these part of the window motor guts(my lay terminology)??? Like I mentioned, I replaced the pass motor with a new one and saw nooo difference between my original power window motor performance and the new one.

Both windows go up and down very slow and weak....I almost have to help them up. and forget about it if the doors are closed and the glass starts to reached the seals....forget it!!!!

So can you be more specific about the "assist spring in the regulator"? Is it about 3-4" in diameter and it wound up in the motor assy???

REELAV8R

Have you tried applying power directly to the motor from the battery (jumper cables or some such thing) to see if there is a difference in performance. This would cut out wiring, switch and relay to either eliminate or confirm a problem with those items. If it's the same then I would suspect the spring.

CVO2FIXUP

I don't have power windows, however it was very hard to turn the handle to lower and raise the windows. I took apart the door and lubed up the entire window mechanism thoroughly. What a difference that made. Can now raise and lower the windows with just the fingertips on the crank. Try that.

drwet

I had the same problem with my '79 a couple of years ago, so I bought a new motor and regulator for the driver's side. I don't remember the details but I do recall there were two separate parts to the motor - the motor itself and an attached gearbox. I found the grease in the gearbox was like glue. My solution was to clean out the old grease and re-lube the gearbox. I also removed the entire window mechanism and cleaned out the old grease, and relubed it. When I was done, the window was unbelievably fast. I still have to do the passenger side, but I've been putting it off because the whole job was no fun! FWIW

dprinter1

It's 38 years old, clean everything and re-lube, BEFORE throwing anymore parts at it.

ezrider01

So I have replaced the relay and it made no real difference.

I have both regulators and two new motors (not rebuilt) coming today hopefully, just decided to go new. I have cleaned and relubed tracks and mech with no real good results.

I will however apply direct power to the current motors as REELAV8R suggusts to see if it makes a difference before changing them out.

Will update with that progress. Laterz

bradleyb66

I just got my 79 windows back together last night after replacing the regulators. I went back and forth as to replace regulators, motors or both. Decided to try regulators first - HUGE difference. Windows go up much faster now, even with the old motors (previously, I would have to 'help' pull them up with my hands). I also cleaned and re-lubed the channels, and replaced the roller on the windows. Both of my assist springs looked good (weren't broken), but obviously they had lost some of their 'spring'.

Since you already have the motors, it's probably easier to just replace both though. The bolts holding the motor to the regulator are 'hidden' when installed in the door, so it's just a little harder to get to them after it's all installed.

And in case you haven't already figured it out, the assist spring is a coiled spring (coiled like a snake) that is attached to the regulator (not the motor). Here is a link to one that Willcox sells, but your new regulators will already have this spring installed: http://willcoxcorvette.com/product_i...ducts_id=25864

labhound

I'll be sure to follow your progress on this, my driver side window was kinda like that so I lubed al the tracks and it seemed to work fine then stopped moving completely . It used to work only with the door partially open..?... now not at all.

labhound

Ok, where is the power window relay...? I checked the ohms in the switch both up and down and it's good.

labhound

....wait here while I try and go back in time to smack the designer that put them here......

but, if one side works fine then wouldn't that rule out the relay?

oledave60

On another forum this is reported to greatly improve power to the motors.

addballer696

had the same problem. check the alternator. even with new battery anbad alternator will cause these symptoms.