Bad fresh 727 noises

[dvw]

Front clutch for performance use is .012"-.015" per friction. So with 5 frictions that's .060-.075". If it's larger it won't kill it. Factory can be .130". Rear clutch .025-.040". There are different thickness steels available as well. I woulldn't worry. You are fine.
Doug

 

[icetech]

So.. i put it back together last weekend and the endplay was .085, i'm not in a rush to put it back in the car so i figure i'll order a .102 pump washer and a input/output thrust washer shim... Parts show up.. they sent a input/output thrust washer instead of the shim... Just an annoyance as it will now wait another week on a $2 part..

Ordered from Transmissionpartsusa.com, they shipped fast which is nice and the prices are really good but... yeah..

Anyway.. since i'm posting.. I have read a couple of 727 books and watched a ton of videos but no one ever explains what the rear pumps actual function is.. i know you could push start a car with a rear pump trans but do they serve another purpose? Also curious if it's possible to make sure the ball bearing stayed in place before butting it all up. (just my paranoid brain messing with me as usual)

 

[Dave6T4]

I always put a glob of grease in the ball socket to hold the ball during assembly.

 

[icetech]

I always put a glob of grease in the ball socket to hold the ball during assembly.

I did the same... i am using that thick blue trans assembly goo.. makes the trans near impossible to turn by hand til it runs though My brain just started thinking bout when i put the rear drum/gearsets in that i was moving the output shaft in and out a bit which made me wonder if the bearing could have fallen out.. I hate my brain it does **** like this to me all the time

 

[dvw]

The rear pump feeds governor pressure. If there is no check ball driving the inner rotor the trans will not shift out of 1st gear. If I remember correctly with a stock valve body the front pump pressure is bypassed and the rear pump supplies fluid pressure for clutches and bands when the vehicle gets up to speed.
Doug

 

[icetech]

The rear pump feeds governor pressure. If there is no check ball driving the inner rotor the trans will not shift out of 1st gear. If I remember correctly with a stock valve body the front pump pressure is bypassed and the rear pump supplies fluid pressure for clutches and bands when the vehicle gets up to speed.
Doug

Thanks doug.. didn't think it did that much, now i know

Place hasn't responded back bout the wrong part shipped.. probably gonna put it back together with what i have, should end up around .065 endplay which is in spec but not great, no biggy.

 

[dvw]

Thanks doug.. didn't think it did that much, now i know

Place hasn't responded back bout the wrong part shipped.. probably gonna put it back together with what i have, should end up around .065 endplay which is in spec but not great, no biggy.

I have shims and thrust washers.
Doug

 

[icetech]

I have shims and thrust washers.
Doug

thanks, they finally emailed me last night and sent the shim.... but i'm thinking 50/50 they will send a second thrust washer..

 

[Dave6T4]

It will dump trans fluid without yoke in it.

 

[oldkimmer]

Thanks doug.. didn't think it did that much, now i know

Place hasn't responded back bout the wrong part shipped.. probably gonna put it back together with what i have, should end up around .065 endplay which is in spec but not great, no biggy.

Just out of curiosity how are u checking the end play? Do u know that u have to have the trans sitting up on the tail shaft to measure end play? Kim

 

[HEMIB]

Ok.. i found the cause of the noise but not the reason... i was looking through pics i took during disassembly, was going to post them to see if i missed something and i found this..

I was looking at all the machines/wear surfaces yesterday and assumed it was deeper in the trans.. but nope..
View attachment 1642433
So it was self clearancing against tis...
View attachment 1642434
BTW.. when i pulled it apart i saw the rough machining on the face of the stator but checked against my old pump and was the same.. didn't even think bout that beveled area since it should never make contact..

I just went and measured, the pump fiber washer in that pic is .083

so i thought maybe i missed the thurst washer between the drums.. but it's there... and measured .062 dead on..


View attachment 1642435


Soo.. now the question i have is what keeps the input shaft from going forward into the pump like that? I had to have missed a washer or something somewhere.. That pump is a 73+ with the wide bushing and matching drum out of a trans i bought to convert to 24 spline..

Is that an input shaft pump hub mismatch some of the input shaft had a larger metal seal ring your input shaft has 2 it looks like the pump hub had a larger ring running inside it eg 2 small 1 large seal ring could be loosing pressure to the clutch in 2nd

 

[icetech]

Just out of curiosity how are u checking the end play? Do u know that u have to have the trans sitting up on the tail shaft to measure end play? Kim

yes... this was all 8 months ago.. got it all sorted and works fine thanks though