.010/lined plate in the Direct Drum: What Does this mean?

[Blown&Injected]

The ASTG says there should be .010" per each lined plate for the Direct Clutch pack but it does not say where or how to measure the .010 per.

There are 6 lined clutches so there should be .060" somewhere to measure for the assembly. The Forward drum says to measure between the Clutch Backing Plate and the Snap Ring. It seems that this would be the only place to make this .060" check.

What's the deal?

TIA,

 

[Nordbert]

ATSG manual

My ATSG (revised edition) makes no mention of clearances, it just says to make sure the composition clutch plates turn freely. How much clearance do you have between the snap ring and the backing plate? .060" doesn't seem excessive to me. BTW, how much clearance do you have between the low/rev clutches and the case?

 

[Blown&Injected]

I will check later today - It is all together but I have to change the selective rear thrust washer - so it is coming apart - should have the part this afternoon - I hope!

 

[HOTTOGO]

.060" sound like a 2-3 fair waiting to happen. Didn't you read the infamous "strengthing the 2004r" article??? .035-.038" is the prefered. ah but how to get that hum... that is the ?! Good luck!!! Best way to check though is with a dail indicator to the top of the backing plate and use compressed air in the center support.

 

[Blown&Injected]

Thanks Mark,

Yeah I read it; I do not know how I missed it???

But how again? The center support is installed on top of the direct drum. Is this checked while out of the trans? Seems like it must be done out of the trans - maybe setting the direct drum on the snout of the center support and then blowing air into a passage on in the center support. I guess I need to build a fixture to hold the thing together and set the dial indicator.

Thanks,

 

[petesgn]

Originally posted by Blown&Injected
Thanks Mark,

Yeah I read it; I do not know how I missed it???

But how again? The center support is installed on top of the direct drum. Is this checked while out of the trans? Seems like it must be done out of the trans - maybe setting the direct drum on the snout of the center support and then blowing air into a passage on in the center support. I guess I need to build a fixture to hold the thing together and set the dial indicator.

Thanks,

Yes check it out of the trans, just flip the center support over and slip direct drum on it .
The way i did it was i used a mag base dial indicator attached the mag base to the band surface apply air to the port on the center support then read my reading.



You have to play around with different steels until you get your clearance right.

 

[HOTTOGO]

petesgn got it right. If you have a soild bench preferable a stell one you mount the indicator on it, if not then just on the drum itself. Best to check it in several places and get the average. Better to error on the lose side then tight side if you are shooting for .035-.038" though. But anythig closer to those #'s is better then .060"

 

[Blown&Injected]

Thanks lots guys.

It sounds like I may need to find some more parts (steels)

I have been just sitting on the trans for weeks waiting on a selective rear thrust washer - I'm about ready to just build up the #3 with some weld and then machine the damn thing down to a size #6.

Any other tricks/methods for ensuring the proper clearences/end play?

--I have the rear end play OK - once I get the washer.

--I now got it for the direct clutches.

--I have .021 on the Forward clutch shaft using a #15 front end play selective washer.
(The ASTG says "...never let rear end play exceed front end play."
It does not seem that this measurement will change when I change the rear selective washer. I did this measurement just by grabbing the end of the shaft with some vice grips and pulling up and down - it was easy to feel the stop on both ends but I first had to put some pressure, and then release, on the back of the output shaft??? The forward clutch shaft would not move up and down until I used the output shaft holding fixture to move things.

--Used a feeler gauge to measure the play between the snap ring on the turbine shaft and the overdrive carrier = .019

--Measured the overdrive end play, I think it was about .035. Subtract the turbine shaft play: .035 - .019 = .016.

Am I missing anything?

Any tips?

Thanks,

 

[petesgn]

Originally posted by Blown&Injected
Thanks lots guys.

It sounds like I may need to find some more parts (steels)

I have been just sitting on the trans for weeks waiting on a selective rear thrust washer - I'm about ready to just build up the #3 with some weld and then machine the damn thing down to a size #6.

Any other tricks/methods for ensuring the proper clearences/end play?

--I have the rear end play OK - once I get the washer.

--I now got it for the direct clutches.

--I have .021 on the Forward clutch shaft using a #15 front end play selective washer.
(The ASTG says "...never let rear end play exceed front end play."
It does not seem that this measurement will change when I change the rear selective washer. I did this measurement just by grabbing the end of the shaft with some vice grips and pulling up and down - it was easy to feel the stop on both ends but I first had to put some pressure, and then release, on the back of the output shaft??? The forward clutch shaft would not move up and down until I used the output shaft holding fixture to move things.

--Used a feeler gauge to measure the play between the snap ring on the turbine shaft and the overdrive carrier = .019

--Measured the overdrive end play, I think it was about .035. Subtract the turbine shaft play: .035 - .019 = .016.

Am I missing anything?

Any tips?

Thanks,

Just take your time

on my trans i set the end play rear .005, middle .019, top .006
I try to set mine to min specs

Seems most of the trans rebuilders around here do not check end play because none of the trans parts houses carried the selective washers i needed


On my direct i had to use a thicker apply ring from the 2004r FWD drum( got a free one from a parts house) then was able to mix and match steel plates to get my clearance right.



Good luck

 

[Blown&Injected]

Man that worked great!!!

Thanks for the direct drum check procedure!

=============================================
>>I have .021 on the Forward clutch shaft using a #15 front end play selective washer.
The ASTG says "...never let rear end play exceed front end play."

--Used a feeler gauge to measure the play between the snap ring on the turbine shaft and the overdrive carrier = .019

--Measured the overdrive end play, I think it was about .035. Subtract the turbine shaft play: .035 - .019 = .016.<<
=============================================

The .021 is in spec on the forward. Would like to get it tighter but I'm using the #15 already.

The .016 is in spec but I can use a bigger selective washer here. Is it worth it to tighten this up a bit?

Thanks,

 

[HOTTOGO]

HINT/TIP, end play's not as critical as you think, if your within spec's your good to go.