1991 FORD FESTIVA differential

Fig. 25: Measuring Differential Bearing Preload

Courtesy of FORD MOTOR CO.
3. Unthread gauge tool until differential bearings are seated. Install Differential Rotator into differential assembly. Using INCH lb. torque
wrench, rotate differential assembly while unthreading gauge tool. Unthread gauge tool until 4.3 INCH lbs. (.5 N.m) of turning torque is
obtained.
4. Using feeler gauge, measure gap of gauge tool. Select correct thrust shim(s) by adding .006" (.15 mm) to measured gauge tool ga p . S h ims
are available from in thicknesses of .043" (1.08 mm) to .079" (2.00 mm) in .040 mm increments.
5. Disassemble case halves. Remove gauge set and spacers. Install selected shim(s) in transaxle case. DO NOT exceed 3 shims. Remove
bearing race from gauge tool and install race in transaxle case. Reassemble transaxle case halves. Install bolts and tighten bolts to
specification. See TORQUE SPECIFICATIONS
.
6. Install Differential Rotator (T88C-77000-L) into differential assembly. Using INCH lb. torque wrench, rotate differential assembly to
confirm correct bearing preload. Turning torque should be 18-25 INCH lbs. (21.-2.8 N.m). If turning torque is not within specification,
repeat steps 1) through 6).
FINAL REASSEMBLY
1. Install low-reverse brake piston by applying even pressure on perimeter of piston while rotating slowly. Install 20 return springs and
low-reverse brake hub. Using appropriate compressor, compress return spring and install snap ring. See Fig. 9
.
2. Install dished plate with small end of dish facing away from piston. Install clutch discs, retainer ring and one-way clutch. Install one-
way clutch machined surface toward retainer ring. Install snap ring.
3. Using a feeler gauge, ensure clearance between one-way clutch and retainer plate is .031-.041" (.80-1.05 mm). If clearance is not within
specification, select correct retainer plate to obtain correct clearance. Retainer plates are available in thicknesses of .063" (1.60 mm)
to .102" (2.60 mm) in .20 mm increments. Apply air pressure to low-reverse oil passage and check for proper clutch operation. See Fig.
10 .
4. Place converter housing on bench with output shaft facing upward. Install needle bearing over output shaft. Install drum hub assembly
onto output shaft spline. Install needle bearing with thrust washer in recess of drum hub. Install rear planetary carrier onto one-way
clutch race. Install snap ring. Install rear planetary assembly into drum hub. Install oil tubes into transaxle case.
5. Install governor into transaxle case. Ensure alignment mark on governor sleeve is aligned with mark on transaxle case. Install go ve r n o r
cover.Tighten bolts to specification. Refer to TORQUE SPECIFICATIONS
. Apply appropriate gasket sealant to converter housing
and install transaxle case. Once case halves are secured in place, ensure all parts previously installed rotate without resistance.
6. Lubricate servo piston with ATF. Assembly servo retainer, piston, piston large seal and spring. Insert assembly into transaxle. Usin g "C"
clamp and socket, compress assembly and install snap ring.
7. Install thrust bearing and thrust washer. Install sun gear shell with sun gear spacer and sun gear. See Fig. 8
. Install front planetary
carrier with thrust washer onto sun gear. Install thrust washer and thrust bearing onto front of front planetary carrier.
8. Install seal sleeve to center of front planetary carrier. Install front ring gear. Install front ring gear needle bearing with rollers facing
upward. Install thrust washer. Match tangs on thrust washer with mating holes in rear clutch assembly.
9. Install rear clutch assembly. Install needle bearing. Companion thrust washer is fitted to oil pump support later in reassembly procedure.
Install front clutch assembly. Install band, band strut and band adjusting stop. Tighten band adjusting stop until band is secured in
place.
TOTAL END PLAY ADJUSTMENT
1. Remove oil pump cover from oil pump housing. Set oil pump housing aside. Coat pump support thrust washer with petroleum jelly and
install on end of pump support. Ensure washer tangs mate with holes in pump support.
2. Install pump cover in front clutch drum. DO NOT have front drum adjusting thrust shim installed. Place a straightedge across transaxle
NOTE:Low/reverse snap ring m ay not have been installed during production. Snap ring is required
during overhaul reassem bly.
Page 23 of 26 MITCHELL 1 ARTICLE - 1988-94 AUTOMATIC TRANSMISSIONS Ford ATX Overhaul
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Differential Backlash.004 (.01)
Front Clutch Drum Bushing Diameter1.735 (44.08)
Front Clutch Pack Clearance.063-.071 (1.6-1.8)
Front Drum End Play.020-.031 (.5-.8)
Front Planetary Pinion Clearance.031 (.8)
Low/Reverse Clutch Pack Clearance.032-.041 (.8-1.05)
Oil Pump Gear Clearance.010 (.25)
Oil Pump Sealing Ring Clearance.016 (.40)
Outer Gear-To-Housing Clearance (1) .10 (.25)
Output Gear End Play.003 (.08)
Rear Clutch Pack Clearance.031-.039 (.8-1.0)
Rear Planetary Pinion Clearance.031 (.8)
(1)Oil pump outer gear.
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00025375
Page 26 of 26 MITCHELL 1 ARTICLE - 1988-94 AUTOMATIC TRANSMISSIONS Ford ATX Overhaul
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1. Check pressure plate surfaces for scoring, cracks or discoloration. Remove minor scratches or discoloration with fine emery cloth. Check
pressure plate diaphragm spring fingers for discoloration, scoring, broken or bent segments. Ensure all spring ends are the same height.
2. Check clutch disc lining surface for hardening or presence of oil. Check for worn clutch disc lining. Check for loose lining rivets.
Measure depth of rivet heads. Minimum allowable rivet depth is .012" (0.3 mm). Check for wear or rust on splines. Rust may be
removed with emery cloth.
3. Check flywheel surface for marks, scoring or discoloration. Minor surface repairs may be removed with fine emery cloth. Flywheel must
be machined if scoring, runout, or discoloration is excessive. Maximum flywheel runout is .008" (0.2 mm). Check for damaged or worn
ring gear teeth.
4. Check pilot bearing for wear. Check clutch release/throw out bearing for damage or wear at contact points. Rotate bearing in both
directions and check for binding or abnormal noise.
Installation
1. Replace release bearing and/or pilot bearing as necessary. Clean sealant from flywheel attaching bolt threads. Replace bolts if sealant
cannot be removed. Coat bolt threads with Stud/Bearing Mount Sealer (EOAZ-19554-B ), and install flywheel. Tighten bolts in a
diagonal sequence to specification. See TORQUE SPECIFICATIONS
at the end of this article.
2. Position clutch disc on flywheel with damper springs facing away from flywheel. Hold clutch disc in place with Clutch Aligner (T77F-
7137-A ). Position pressure plate over clutch disc. See Fig. 4
.
3. If reusing original pressure plate, align marks made during removal. Install pressure plate retaining bolts. Alternately tighten bolts to
specification. See TORQUE SPECIFICATIONS
at the end of this article. Remove clutch aligner. Place transaxle on transmission jack.
4. Lightly coat input shaft splines with Clutch Grease (C1AZ-19590-B ). Install transaxle, taking care to align input shaft through the
clutch disc spline. Align clutch housing onto engine guide bushings.
5. Install transaxle lower attaching bolts and tighten to specification. Using transaxle jack, raise transaxle to correct height and tighten
engine bracket bar hook. Install front engine mount and bracket and tighten to specification. Install starter and lower mounting b o l t s,
tighten to specification.
6. Install control rod to transaxle and tighten bolts and nuts to specification. On Festiva, install crossmember and support braces. Install
support braces. On all models, install exhaust hanger to crossmember. Remove transaxle jack.
7. Install new circlips on each half-shaft with gap at top of clip grove and slide into transaxle differential. After circlip snaps into place,
pull outward on hubs to confirm half-shafts are retained by circlip. Install front suspension components, wire harness, underbody and
fender splash shields and front tire assemblies.
8. Connect neutral and back-up light switch and ground wire. Fill transaxle with Mercon ATF transmission fluid to specification. In st al l
and adjust clutch cable or slave cylinder line bracket. Lower vehicle and remove engine support bar. Install speedometer cable into
transaxle.
9. Install battery and/or connect battery cable. Install air cleaner. Adjust pedal free play. See CLUTCH PEDAL FREE PLAY
under
ADJUSTMENTS. Recheck transaxle fluid level and road test vehicle.

Fig. 4: Exploded View Of Clutch Assembly

Courtesy of FORD MOTOR CO.
CLUTCH RELEASE BEARING & FORK
Removal
Remove transaxle. Remove release lever bolt and slide release bearing off. See Fig. 4 . Remove release lever shaft and remove release lever. CAUT ION: T ransaxle alum inum alloy construction requires precise tightening of m ounting bolts. T orque
specifications m ust be strictly adhered to. See T ORQUE SPECIFICAT IONS
.
NOTE:T he clutch release bearing is pre-lubricated and perm anently sealed. DO NOT clean release bearing in
solvent.
Page 3 of 5 MITCHELL 1 ARTICLE - CLUTCH 1988-93 Clutch
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