[quote=P10crew]? Since the reaction carrier thrust is fubr’d is there any down falls to rollerizing this with the 350 rear pump roller and selectives? After reading more articles in gears magazine it appears to be a good upgrade.
I also notice that this one don’t have the silencer ring do you use them?
This one can be debated to death.....And no one would be right or wrong.
That particular failure IS 99% of the time from overheating coupled with lack of lubrication, With some excessive radial run-out! . The Reaction Carrier ONLY thrusts into the Output Carrier in First Gear & Reverse! This operation duty cycle is so small in the whole scheme of things that ALL 4L80E's had plastic Thrust Washers at this location from the factory! And most live through multiple rebuilds without failure.
To save that Reaction Carrier.....You would have to machine a bearing pocket & use a TH350 pump bearing because the Thrust Surface got tore-up. Even then I would be concerned that steel,bronze,copper,tin debris got into the Pinion Rollers of both carriers.
Christoforos Kokkinos.....The Owner of CK Performance pioneered MANY TH400/4L80E performance modifications & techniques, And I believe this was one of them if the article you read didn't give him credit?
I have a lot of respect for Chris, But his technical information doesn't necessarily apply to every application!
The Silencer Ring was eliminated right around '94/'95.....I use them on ALL 4L80E/TH400 builds to help control Radial Run-Out of the Reaction Carrier & Help the Reaction Carrier Bushing live longer.
The "Self Lubricating" Thrust Washer that CK sends in their calibration kit is a nice piece IF you still have Reaction Carrier end-play with it installed!! Chris specified a thicker than stock washer here because end-play is NORMALLY excessive. But that's not always the case with every unit!
If the CK washer ends up tightening to end-play to much (Less than .005").....Run a Brass Output Thrust Washer between the Reaction & Output Carriers & recheck end-play.
If now excessive (Over .015")......Tighten it to .010" with Sonnax 34006-05 Shims.
The Brass Thrust requires MORE end-play than the CK Thrust minimum of .005"!!
Here's a tech article on TH400/4L80E end-play....... HERE