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08-20-2014, 11:04 PM
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#1 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
3-4 Clutch.
I did 2 Mock-up 3-4 stacks for this thread, I don't keep track of the thicknesses of clutches & steels I use because of the on hand selection I have at work. Use 4L60E Borg Warner Hi-Energy or Raybestos equivalent Frictions ONLY. This is a '88 Input Drum & (#7) 3-4 Apply Ring, AcDelco 8685044 Apply Plate & AcDelco 24212459 Backing Plate (Top Plate), & a .093" thick Snap Ring. Stack No. 1, Apply .222", Backing .159", 7 Frictions & 6 Steels. .222 Apply Plate .080" Friction .077" Steel .080" Friction .077" Steel .080" Friction .077" Steel .067" Friction .077" Steel .067" Friction .077" Steel .067" Friction .077" Steel .067" Friction .159" Backing Plate Stack No. 2, Apply .222", Backing .159", 8 Frictions & 7 Steels. .222" Apply Plate .080" Friction .060" Steel .080" Friction .060" Steel .067" Friction .060" Steel .067" Friction .060" Steel .067" Friction .060" Steel .067" Friction .060" Steel .067" Friction .060" Steel .067" Friction .159" Backing Plate |
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08-21-2014, 08:13 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
3-4 Clutch Continued....
Set 3-4 Clutch Clearance at .035" to .045". After setting Clearance, Remove Snap Ring & Backing Plate. Install the 5 Load Release Spring assemblies. These keep the Clutch plates from dragging when the 3-4 Clutch is released. Many builders don't install the release springs, I have never had an issue with using them. There is plenty of info on the subject & a ATSG bulletin saying not to use them. But I have Never traced a 3-4 failure back to the springs 
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08-21-2014, 09:36 PM
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#3 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
Flip the Drum over.
Replace the 4 Teflon Sealing Rings on the Input/Turbine shaft. Use the One Piece Sealing Rings ONLY, Use Scarf cut or Step cut at your own risk!!!! These are difficult to install without Installer & Resizing tools. There are several DIY methods on the internet/YouTube, Some pointers.... Do not over stretch the Seals, Just enough to go on without damage. Do not Under Size them either! Using hose clamps & what not, Just get them small enough to lightly rock the Stator shaft on them. Install the selective shim & Torrington Bearing on the Input Drum, Slide the Stator Shaft down the Input Shaft to do Final Sizing. Always resize 1 Sealing ring at a time, Start with the Bottom Ring First! The Stator Shaft is bolted to the Pump Body, Use Pump Body/Stator Shaft assembly for Final Sizing.....Just to be clear. Another option is taking the Input Drum to a trans shop for Sealing Ring Install. 1st pic, My install tool. 2nd pic, Found on the internet using a Lip Wizard 
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08-22-2014, 10:03 PM
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#4 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
Next is the Reverse Input Drum.
If reusing this Drum, Replace Both Bushings!!, You have to "Part" the upper Bushing with a Cape Chisel....Find the parting line in the bushing (Not always easy to find) & Carefully part the Bushing. The other Bushing can be driven out. Install the inner & outer Lip Seals on the piston, Lube both with TransJel. Work Inner seal first, Then work the Outer. Compress Return Spring Assembly, Install Snap ring **Early 700R4's used a Steel Piston & a Wave Plate instead of a Belleville Plate, DO NOT interchange ANY parts between Early & Late Drums** Install the Belleville Plate into the Drum (Outer Splined end Down, Contacting the Drum, Inner part of the Plate will face up, Contacting the First Steel. Install First Steel Plate Friction Steel Friction Steel Friction Steel Friction Backing Plate Install Snap Ring. Check Clearance of Reverse Input Clutches, .060" to .080" is good, This Clutch is only applied in Reverse. |
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