4R70W Rebuild Checklist

8/10/2019 4R70W Rebuild Checklist

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4R70W Rebuild Checklist

Note: Some Ford part numbers will be superceeded with updated part numbers. Always verify the new part numberswith your parts advisor.

Teardown

Remove output shaft speed sensor from case before you remove geartrain to prevent breaking sensor. If you beak it the Ford part # F4AZ-7H103-A .

Always replace 1991 - 1994 MLPS. Lots of failures just like early E4OD MLPS. Ford part# F5AZ-7A247-A . With 1995 and up don't put MLPS in parts washer with case. The waterand soap kills them.

MLPS (Manual Lever Position Sensor)

Update New style MLPS released

Date - 1995


2/26

Reason Original style did not have a very good weatherproof seal. This allowed water to enter theconnector and corrode the pins, which caused electrical problems. New MLPS has improvedweatherproof seal.

Parts Changed

1. MLPS

2. Vehicle harness connector

Important The new style MLPS comes with a matching vehicle harness connector. The problem is thatyou have to remove the pins and their wires from the old vehicle harness connector. What ever you dodon't pull all the pins out at the same time because you will never figure out were they go. Easiest thingto do is remove one pin at a time and re-install it into the new connector.

Interchange Will fit all past models.

Part Numbers

MLPS (includes harness connector) F5AZ-7A247-A

Update Output Shaft

Date - 1995

Reason To eliminate governor oil feed bore and 4th sealing ring groove, which is not used on AODE.That means the shaft no longer uses the governor pin, sleeve and snap ring.

Parts Changed Output Shaft changed from 4 ring to 3 ring and has no governor passage.

Interchange Will fit all past models

Part Numbers

Note If you need a shaft check with your hard parts supplier, many of them have good used updated


3/26

output shafts in stock.

Early model output shafts use a pin in governor feed hole. Don't loose it. If you already lostit, the pin measures .180'' Thick by 1.770'' Long.

Be careful, there are 2 different OD assemblies. One uses a rubber sleeve and piston, whilethe other only uses just a piston. It's real common mistake to install small servo withoutcover.

Pump

Inspect pump body for wear. Look closely at area between eyebrows.


4/26

Check pump clearances, must be perfect.

Outer gear to body - .006'' max.Lobe to lobe - .006'' max.Side clearance - .0005'' - .002''


5/26

Loctite and stake pump bushing.

Use your finger to check down inside bore of stator for ring grooves. Late stator will feel

ring grooved because it's stepped from factory. You have to look at it closely.

Flat file stator.


6/26

2nd gear piston bleed hole installs at 12 O'clock - straight across from the feed holes.

Set Total Unit Endplay between .005'' to .020'' (selective washer on stator) Red colored # 4washer will usually get you there.

Update Pump Stator Support

Date - 1994

Reason New stator has a U-groove style bushing to reduce bushing wear, which decreases forwardclutch sealing ring failure.

Recommendation If your stator is still good then there is no reason to update. We have seen just asmany of the updated stators bad as the earlier one's.


7/26

Interchange Will fit all past models and can be I.D. by a step that is machined into the sealing ringbore.

Part Numbers

Pump Stator F4AZ-7A108-A

Reverse, Forward & Direct Drum

Reverse Input Drum

Update Reverse input drum changed from 7-element roller to 14- element, then to mechanical diode.

Date - Late 1997

Reason Reduced failure of the intermediate sprag.

Note The AODE came equipped with the 7- roller element drum. The 4R70W came with the 14- rollerelement drum. The 14-element drum is suppose to be the stronger of the two because it has twice asmany rollers in the element. However, the 14- element sprag still fails in police cars, fleet vehicles, taxisand limousines. In order to reduce sprag failure Ford has released a new design reverse input drumthat uses a mechanical diode.

Parts Changed

Reverse input drum Inner race Outer race Sprag element Retainer and snap ring


Part Numbers

Mechanical Diode Reverse Input Drum (Sprag not included) # F8AZ-7D044-AA

Mechanical Diode Sprag Package # F8AZ-7A089-AA

Reverse drum band surface must be flat. Sand apply and ring surfaces. No more than 1/16''wear allowed on sides of drive lugs.


8/26

2nd gear element springs and rollers, must be perfect to reuse. Inner and outer sprag racesmust also be perfect. Sand outer race with 80 grit.

Sprag Rotation 2nd Gear Sprag - turns LEFT, locks right.Low Sprag - outer race turns LEFT, locks right.


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Always modify sprag retainer on Reverse input drum to keep snap ring from coming off.

1 . Use a hacksaw to cut 4 tabs (5/16'' wide) in the sprag retainer. Cut the tabs just a little deeper than thewith of the snap ring.2 . Bend the tabs up & install retainer on drum.3 . Install snap ring and bend tabs down over it.

On 7 and 14 element Reverse drums the outer race installs with the taper up facing towardsyou.

OK to reuse 7 or 14 element Reverse drums on normal usage cars. Police, taxi, limousineand fleet always update to '' mechanical diode '' style drum - Ford part # F8AZ-7D044-AA (Must be used with sprag package F8AZ-7A089-AA ).

(Mechanical Diode Style)

Update Reverse input drum changed from 7-element roller to 14- element, then to mechanical diode.

Date - Late 1997

Reason Reduced failure of the intermediate sprag.

Note The AODE came equipped with the 7- roller element drum. The 4R70W came with the 14- rollerelement drum. The 14-element drum is suppose to be the stronger of the two because it has twice asmany rollers in the element. However, the 14- element sprag still fails in police cars, fleet vehicles, taxisand limousines. In order to reduce sprag failure Ford has released a new design reverse input drumthat uses a mechanical diode.

Parts Changed

Reverse input drum Inner race Outer race Sprag element Retainer and snap ring


Part Numbers

Mechanical Diode Reverse Input Drum (Sprag not included) # F8AZ-7D044-AA

Mechanical Diode Sprag Package # F8AZ-7A089-AA

Forward drum likes to ring groove on one side only, look closely - Ford part # F3LY-7F207-A . Sand ring surface with 220 grit. Make sure both check balls are free. Use 700solid input shaft rings in place of OEM.

Forward Clutch Sealing Rings


10/26

Update New forward clutch sealing rings released

Date - 1994

Reason Original style rings were prone to wear because stator support does not have a bushing in theend of it like AOD does. So rings are unsupported and move around a lot more. New style rings aremade of a much stronger ''bullet proof'' material.

Parts Changed Forward clutch sealing rings. Can be I.D. by silver color.


Part Numbers

Forward Clutch Sealing Rings (Updated style) F4AZ-7D019-A

Wet air check the forward and reverse drums on the pump. Watch for pump and ring crossleaks.

Direct drum steels must slide up and down freely in drum, if not toss drum. Use 325-4Lsolid input shaft rings in place of OEM. Very hard to size these rings, but fixes ring leakage

problem.


11/26

Check ball in Direct piston likes to leak. Always reseat it with small punch and hammer

Clutch Clearance Forward - .050'' to .070'' (selective snap rings)2nd Gear - .010'' to .020'' (selective steels)Note: Use an H Gauge to check. If you don't have one make sure top steel is flush or just below the pump gasket

surface. Reverse Input - .040'' to .060 (selective snap rings) Direct - (selective snap rings)4 fr iction - .040 to .050''5 fri ction - .050'' to .060''6 fri ction - .060'' to .070''


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4R70W Planetary Parts

Sun Gear Shell - 38 teeth ( 4R70W ) F4SZ-7A019-A Sun Gear Shell to Forward Hub Bearing Sun Gear - 31 teeth ( 4R70W ) F3LY-7A399-A Rear Sun Gear Bearing Planetary - 25 tooth pinions ( 4R70W ) F3LY-7A398-A Planet Ring Gear - Dips in on outside ( 4R70W ) F3LY-7A233-A Ring Gear Hub ( 4R70W ) F3LY-7D164-B Ring Gear Hub Bearing (Enclosed style bearing) F3LY-7F242-A

Case

Check sealing ring bore in case for wear. Bore must be perfect. Worn output shaft case bushing and/or extension housing bushing are what cause case to wear. Always replace both bushings.


13/26

Check case dams and passages for breakage from high line pressure spikes (see TransgoShift Kit) .

Check EPC solenoid bore in case for wear.

EPC Solenoid and Hold Down Bracket

Update New EPC solenoid and bracket

Date EPC solenoid and hold down bracket changed 1993. Hold down bracket changed again in 1996.


14/26

Reason 1993 change was to reduce EPC solenoid clogging and eliminate wear to the snout of thesolenoid. New bracket retains solenoid in case much better then original.

1996 hold down bracket was changed because valve body plate was made thinner.

Recommendation Always replace the EPC solenoid no matter what year. They have a high failure rateand are almost always restricted with debris. Just make sure you are using the correct hold downbracket and be careful not to cut the o-rings on the solenoid when you install it into the case.

Parts Changed 1993

1. EPC solenoid body changed in area of hold down bracket.2. EPC hold down bracket redesigned to fit new solenoid.

1996

1. EPC hold down bracket was made 1/16'' shorter.

Interchange

1993 EPC solenoid and matching bracket will fit 1992 to 1995 transmissions.

1996 and up still use the same EPC solenoid but must use the 1/16'' shorter hold down bracket.

Part Numbers

1992 to 1995 EPC solenoid F5AZ-7G383-AA1992 to 1995 hold down bracket F5AZ-7H111-A

1996 and up EPC solenoid F6AZ-7H111-A

1996 and up hold down bracket (1/16'' shorter f or thin ner VB plate

) F6AZ-7H111-A

Accumulator bores in case like to wear out, especially the 1-2. If worn badly case must bereplaced. If there good or have very minor wear Scotchbrite them so rubber seals don't wearout.


15/26

If ring gear hub fits loose on output shaft peen a couple of the splines over and install hub.

Always replace 1-2 aluminum style accumulator piston with the molded rubber style - Ford part # F7AZ-7F251-AA .

1-2 & 2-3 Accumulator

Update 1-2 & 2-3 accumulator piston changed from aluminum to rubber

Date - 1997

Reason Aluminum style wears out the case and burns up the 2nd clutch.

Recommendation Always update to the rubber accumulator. If the bore is worn in your case you cansalvage it by Scothbriting the bore real good and installing the rubber piston.

Parts Changed

1-2 & 2-3 accumulator piston changed from aluminum to molded rubber. AOD does not have a 1-2accumulator piston.


Part Numbers

1-2 Accumulator Piston AODE (Updated molded rubber style) F7AZ-7F251-AA

2-3 Accumulator Piston AOD/AODE (Updated molded rubber style) F7AP-7H292-AA


16/26

Never reuse the early aluminum style 2-3 accumulator. The Teflon rings leak REAL BAD! Instead use the molded rubber style -Ford Part # F7AP-7H292-AA.

Band Adjustment.

If you changed the Low/Reverse band or the planet check the band adjustment.

Low/Reverse Band - 1/4'' (selective servos)

Here's how to check it

1. Install servo assembly into case.2. Use the back of a hammer handle to push down the servo cover until it stops.3. Measure the distance between the bottom of the snap ring and the servo cover. This isyour clearance.4. Adjust by grinding or welding end of servo pin.

OD Band

Non Adjustable - However, once the pump is tight and the OD servo is installed take a pairof channel locks and make sure you can turn the output shaft in both directions. If theoutput shaft only turns one way the band is too tight. Fix it by grinding the pin shorter.

If you changed the OD band or reverse input drum check the band adjustment.


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Valve Body

Valve Body Check Ball Locations


18/26

Update Valve Body

Date - 1996

Reason To prevent the bolts that hold the valve body cover from loosening up and blowing out thegasket.

Parts Changed

1. Valve body cover was made thinner.

2. EPC solenoid hold down bracket was made 1/16'' shorter to accommodate the thinner cover plate.

3. Guide pin bolts and VB dowels were made smaller. Bolts changed from 13mm head to 10mm.

4. Case dowel holes were made smaller.

Interchange Will fit 1992-1997. SEE FOLLOWING: TSB 97-16-7 & TSB 95-8-3

Part Numbers: F7SZ-7A100-AA (1996-1997 valve body); F6AZ-7K720-A (2 VB alignment dowels);F7AZ-7C155-AA (VB to case gasket)

Note Most hard parts suppliers will have good used 1996 and up valve bodies in stock.

1996 and up hold down bracket (1/16'' shorter for thinner VB plate) F6AZ-7H111-ASee MN12 Performance Valve Body Upgrade for 1992-1995 AODE/4R70W
http://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-97-16-7.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-97-16-7.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-97-16-7.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-8-3.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-8-3.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-8-3.pdfhttp://www.tccoa.com/articles/mn12-techinfo/mn12parts/vb-upgrade/vb-upgrade.htmhttp://www.tccoa.com/articles/mn12-techinfo/mn12parts/vb-upgrade/vb-upgrade.htmhttp://www.tccoa.com/articles/mn12-techinfo/mn12parts/vb-upgrade/vb-upgrade.htmhttp://www.tccoa.com/articles/mn12-techinfo/mn12parts/vb-upgrade/vb-upgrade.htmhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-8-3.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-97-16-7.pdf


19/26


20/26

Inspect pressure regulator boost sleeve and PR valve in valve body for wear. Sonnaxreplacement PR sleeve is part # 76948-02K . Sonnax replacement PR valve is # 76948-01K .


21/26

Drill a .050'' - .055'' line to lube hole in VB dam. This keeps the torque converter charged.

Flat File/Stone VB and Case . Warpage is a big time problem.


22/26

Valve Body Stiffener Plate

Update Large stiffener plate on valve body made thicker

Date - 1995

Reason Eliminate a cross leak between forward and reverse oil circuits.

Recommendation If you have one on the bench and the forward or reverse clutches are burned up andyou can't see why, make sure you update to the thicker plate.

Parts Changed:

1. Stiffener plate made thicker.2. Bolts for plate made longer.

Interchange Will fit all past models. See TSB-94-26-9

Part Numbers

Valve Body Stiffener Plate (Updated style - thicker, includes bolts) Ford Part# F4AZ-7F282-A

If you have to change the VB, make sure you are installing the right one. . VB's arematched to Year of Vehicle and Shift Quadrant.

Always replace the solenoids with new Ford OEM.Shift - F7AP-7G484-AA

TCC (Torque Converter Solenoid) - 2 different ones!1 to 3 ohms - F2VY-7G136-A (1992-1995) Note:This part # F2VY-7G136-A is still the currentnumber.
http://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-94-26-9.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-94-26-9.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-94-26-9.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-94-26-9.pdf


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10 to 16 ohms - F7AP-7G136-AA (1996-up valve body only) (If your vehicle is pre 1996 then use the F2VY-7G136-A TCC solenoid.) If you are unsure check the TCCwith an OHM meter. The 1-3 ohms solenoid should be about 1.3 ohms and the 10-16 ohm solenoid should beabout 10.9 ohms. The 1-3 ohms TCC has a Black connector and the 10-16 ohms TCC has a WHITEconnector.

EPC (Electronic Pressure Solenoid) -1992-95 EPC F5AZ-7G383-A (hold down bracket F5AZ-7H111-A );1996-UP EPC F6AZ-7G383-AA (hold down bracket F6AZ-7H111-A )

Always update this to the latest solenoid and bracket design.Shift Solenoids and TCC Solenoid

Update New shift solenoids and TCC solenoid

Date - 1995

Reason Improved shift solenoids to prevent clogging.

TCC solenoid was changed from 1-3 ohms to 10 to 16 ohms for 1995 Lincoln Town Car, GrandMarquis, Ford Crown Victoria and all 1996 and up models.

Recommendation Always replace the shift solenoids and the TCC solenoid on every overhaul. Theyhave a high failure rate and are always restricted with debris, which causes strange shift and Lock upproblems.

Parts Changed1. Shift solenoids redesigned to reduce clogging.2. TCC solenoid changed from 1-3 ohms to 10 to 16 ohms.

Interchange & Part Numbers

Shift solenoids will fit all past models. F7AZ-7G484-AA

TCC solenoids are not interchangeable. You must use the correct resistance solenoid for year and typeof vehicle.

TCC solenoid - 1 to 3 ohms (Fits 1992 to 1995 except 1995 Lincoln Town Car, Grand Marquis, FordCrown Victoria) F2VY-7G136-A

TCC solenoid - 10 to 16 ohms (Fits 1995 Lincoln Town Car, Grand Marquis, Ford Crown Victoriaand all 1996 and up models) F7AZ-7G136-A


24/26

Solenoid Resistance

Torque Converter

Torque Converter

Update Torque converter Lock up apply surface and piston changed.

Date - 1995

Reason To fix a Lock up shudder that happens in 3rd or 4th gear on light acceleration or during the 3-4or 4-3 shift on 1992 to 1995 vehicles. See TSB's 95-23-4 & 96-25-17

Parts Changed
http://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-23-4.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-23-4.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-23-4.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-96-25-17.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-96-25-17.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-96-25-17.pdfhttp://www.tccoa.com/articles/mn12-techinfo/trans-tech/tsb-95-23-4.pdf


25/26

Lock up apply piston surface made 7/8'' larger.

Lock up pressure plate surface made 7/8'' larger

Interchange: Will fit all past models

Part Numbers: http://www.protorque.com Pro Torque

Note Check with your converter supplier, many of them now have the updated converters in stock.

Coolant Return Lines

AOD - Cooler return is BOTTOM line on case

AODE - Cooler return is TOP line on case

Clutch & Band Application Chart

Gear Clutches Applied Sprags Holding Band Applied Solenoids Energized

"D4"1st gear

Fwd. Low Roller Shift Solenoid 1

"D4"2nd gear

Fwd. and 2nd 2nd Roller Both Sol. are OFF

"D4"3rd gear

Fwd., 2nd and Direct Shift Solenoid 2

"D4"4th gear

2nd and Direct OD Band Shift Sol. 1 & 2

Reverse Rev. Input Low/Reverse

"D3/D2"1st gear

http://www.protorque.com/http://www.protorque.com/http://www.protorque.com/


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"D3/D2"2nd gear

Fwd. and 2nd 2nd Roller Both Sol. are OFF

"D3/D2"3rd gear

Fwd., 2nd and Direct Shift Solenoid 2

"D1"1st gear


Note

When Selector Lever Is In

''OD'' - Vehicle will start off in 1st gear and automatically upshift into all four gears. ''D'' - Vehicle will start off in 1st gear and will automatically upshift to 2nd and 3rd,

but not to 4th. ''1'' - Vehicle will start off in 1st gear and will not upshift.

Transmission Oil Pressure Specs

AODE

Note: All pressure tap locations are clearly MARKED right on the case on AODE's & 4R70W's.

Main Line Pressure

In P/N, OD, D/2, 1 @ Idle Hot - 50 to 75 psi In P/N, OD, D/2, 1 @ Stall Hot - 160 to 210 psi In Reverse @ Idle Hot - 80 to 120 psi In Reverse @ Stall Hot - 220 to 280 psi

EPC Pressure

In P/N, Rev., OD, D/2, 1 @ Idle Hot - 0 to 9 psi In P/N, Rev., OD, D/2, 1 @ Stall Hot - 83 to 93 psi

Clutch Pressure

Note You can check for leaks in the Clutch/Band circuits by comparing them to Main Line Pressure.They should be within 10 psi of each other.

How To Check It

1. Install pressure gauge in line pressure tap.2. Install a 2nd gauge in the clutch tap that you want to check.3. Clutch/Band pressure should be within 10 psi of line pressure when the clutch is applied.

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4R70W Rebuild Checklist

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