TRNW-2: 10R80 CDF air check tool

Wed Oct 1 05:05:31 PDT 2025

I am using the 8 spd vms sizer on the ten speed input shaft
Once the 10 is together I put the 8 speed sizer over the input shaft
Then charge it with 60 psi rergulated air once the rings seal there good
To go   they don’t charge I. try again
The 10 input shaft rings are similar to the old re5 rings the. Act like they have
An internal spine if you expand them too wide to install them they never seal
Hope this helps
John p
Precision international

From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Fred Whitaker via trnw2 <trnw2 at trnw.net>
Date: Wednesday, October 1, 2025 at 7:10 AM
To: Fred Whitaker <ibsprag at hotmail.com>, Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 10R80 CDF air check tool
 I know you are supposed to use "regulated" air. But I don't. I use full pressure shop air. Not sure what it is,but probably around 160 PSI or over. I know it's a no no. But I have always done it that way,and have never blown anything.
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Fred Whitaker via trnw2 <trnw2 at trnw.net>
Sent: Wednesday, October 1, 2025 6:05 AM
To: Phil Materi <materi99 at hotmail.com>; Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 10R80 CDF air check tool

________________________________
From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Phil Materi via trnw2 <trnw2 at trnw.net>
Sent: Tuesday, September 30, 2025 5:26 PM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 10R80 CDF air check tool

Interesting that you guys are having success reusing the original rings.  I tried to reuse them unsuccessfully on the first 2 10R80s, that I did.  Then I tried scarf cutting the originals on the next couple unsuccessfully.  We started replacing the rings with new rings, using old bearing races to expand them and the actual components to resize them which was time consuming but worked.  We bought the VMS tools which have been working very well, but still don’t air check well at times.  Hence why I am asking about the tool.  I’ll start air checking with the old rings again and see if maybe I was just unlucky with the first two.

Thanks,
Phil

On Sep 30, 2025, at 3:44 AM, Fred Whitaker via trnw2 <trnw2 at trnw.net> wrote:

 As Pat said airchecking through the shaft and case works for me. A quick google of 10R80 airchecks shows the passages.
 I only replace blown rings on these from the sleeve walking
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Steve Everett via trnw2 <trnw2 at trnw.net>
Sent: Tuesday, September 30, 2025 4:37 AM
To: Phil Materi <materi99 at hotmail.com>; Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 10R80 CDF air check tool

      I have the sizers for the rings, but on occasion will leave the factory ones in place if its a low mileage unit with no burnt clutches,  just did that yesterday on one with 90k miles,  clutches were like new,  valvebody was the issue with the unit.   the sizers I have are made by VMS Concepts , they work great,

   Steve

On Tue, Sep 30, 2025 at 1:58 AM Phil Materi via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
I check them on the shaft as well as through the case and have found that they are air checking better since getting the 3D printed sizer set, but still get the odd one that I need to add fluid to get to air check well.  I like being able to air check the drum itself to at least eliminate anything within it as being the cause of the poor air check.  I’m sure that I am due for trusting that my slight cross leak air check is the rings, only to find out it is a cut seal or cracked piston.  Just added insurance I guess.

Phil
Sent from my iPad

On Sep 29, 2025, at 4:44 PM, pat schulte <zzyzxpat at gmail.com<mailto:zzyzxpat at gmail.com>> wrote:

Why not just check them through the shaft? Maybe I don't understand. I know some may find differently but I am starting to find they aircheck dead tight leaving the original rings in place. I am in the process of testing now. I check them on the shaft when building and then through the case when finished.

On Mon, Sep 29, 2025 at 3:29 PM Phil Materi via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
Good afternoon everyone.  I am wondering if anyone like Richard Wardell is making an aircheck tool for the 10R80, like his 6L80 tool that I've had for years?  I think I saw a video with Richard or someone else using said 10R80 tool and I keep forgetting to ask if he is making them?  Thanks for any help.

Phil Materi
A&B Transmissions
Langley, B.C.
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--
Pat Schulte
AAMCO Transmissions
Temecula, Ca.
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