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Timing Gear fit your 1999 Mercury Mountaineer 6 Cyl 4.0L 5-Speed Automatic Transmission 5R55E
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1999 Mercury Mountaineer
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6 Cyl 4.0L; 5-Speed Automatic Transmission 5R55EVehicle Options
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Recommended
Part No. & Part Description
Price & Qty.
Part No. &
Part Description
Part Description
$13.00 $7.611
- BOLT (SPECIAL)
F77Z-6U000-BA
Bolt - Special- Bolt & Sleeve; M6x35; Rear cassette attachment under valve cover., SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6U000
- Callout Name: 6U000
$18.33 $16.241 
-W702597-S
Ring - Rubber- O-ring for 6U000 bolts, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HR1
- Callout Name: 6U000
$3.25 $1.914
XL2Z-6U000-AA
Bolt - Special- Bolt with 32mm sleeve & O-ring; bolts through hole in cylinder head., SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6U000
- Replaced By: 4L2Z-6U000-AA
$18.33 $12.651
- BOLT (CAMSHAFT SPROCKET)
F77Z-6279-CB
Bolt- LH timing gear to camshaft bolt., SOHC
- Location: Driver Side
- Fit Note: 6 Cyl 4.0L
- Base Number: 6279
- Callout Name: 6279
$71.33 $39.161 
F77Z-6279-BA
Bolt- Bolt; M12 x 92mm; Front Jackshaft gear, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6279
- Replaced By: 2L2Z-6279-AA
$40.17 $28.201
F77Z-6279-AD
Bolt- RH timing gear to camshaft bolt (LH threads), SOHC
- Location: Passenger Side
- Fit Note: 6 Cyl 4.0L
- Base Number: 6279
- Callout Name: 6279
$80.17 $54.831
- TENSIONER ASY. (TIMING)
7U3Z-6K254-A
Tensioner - Timing Belt- RH; Service replacement part, SOHC
- Location: Passenger Side
- Fit Note: 6 Cyl 4.0L
- Base Number: 6K254
- Callout Name: 6K254
$67.33 $46.861 
7U3Z-6K254-B
Tensioner - Timing Belt- LH; Service replacement part, SOHC
- Location: Driver Side
- Fit Note: 6 Cyl 4.0L
- Base Number: 6K254
- Callout Name: 6K254
$87.33 $59.741
4L2Z-6M290-AA
DRIVE ASY. (CAMSHAFT - RIGHT HAND)Cassette - Timing Chain- Rear cassette asy.; Used with 6U000 attaching bolts, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6M290
- Callout Name: 6M290
$147.83 $130.941
- TENSIONER (TIMING CHAIN)
1L2Z-6L266-AA
Tensioner- Balance shaft tensioner, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6L266
- Callout Name: 6L266
$25.17 $17.671 
-W500011-S300
Bolt- Bolt to retain tensioner to block, SOHC
- Fit Note: 6 Cyl 4.0L
- Require Quantity: 2
- Package Quantity: 2
- Base Number: HB1
- Callout Name: 6L266
$8.50 $4.972
YL2Z-6L266-AA
Tensioner - Timing Chain- Jackshaft chain tensioner, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6L266
- Callout Name: 6L266
$44.17 $31.011
- GUIDE (CRANKSHAFT TIMING CHAIN)
2L2Z-6K297-AA
Guide- Jackshaft chain guide, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6K297
- Callout Name: 6K297
$17.67 $12.081 
-W500110-S300
Bolt- Bolt; M8x35mm; Jackshaft chain guide, SOHC
- Fit Note: 6 Cyl 4.0L
- Require Quantity: 2
- Package Quantity: 2
- Base Number: HB1
- Callout Name: 6K297
$11.30 $6.612
F77Z-6K297-BC
Guide- Balance shaft chain guide, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6K297
- Callout Name: 6K297
$17.17 $12.051
-W500014-S303
Bolt And Washer Assy - Hex.Head- Bolt; M6x20mm; Balance shaft chain guide, SOHC
- Fit Note: 6 Cyl 4.0L
- Require Quantity: 2
- Package Quantity: 4
- Callout Name: 6K297
- Replaced By: -W500014-S437
$3.25 $1.914
- GEAR/SPROCKET (CRANKSHAFT)
F77Z-6306-AC
Gear - Crankshaft- Lower Jackshaft sprocket, SOHC; 4x4 only
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6306
- Replaced By: 2L2Z-6306-AA
$48.50 $34.051 - F87Z-6306-BA
Gear - Crankshaft- Lower Jackshaft sprocket, SOHC; 4x2 only
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6306
- Replaced By: 2L2Z-6306-BA
$50.67 $34.661 
F77Z-6306-BE
Gear - Crankshaft- Balance shaft drive sprocket at crankshaft, SOHC; 4x4 only
- Fit Note: 6 Cyl 4.0L
- Base Number: 6306
- Callout Name: 6306
- BELT OR CHAIN (TIMING)
F77Z-6268-BC
Chain Assy- Chain from crankshaft to balance shaft., SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6268
- Callout Name: 6268
$65.00 $44.461 
-W702181-S300
Bolt- Retains jackshaft gear to jackshaft, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6268
- Replaced By: -W703167-S430
$13.00 $7.611
F77Z-6268-AB
Chain - Timing- Chain from crankshaft to Jackshaft, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6268
- Callout Name: 6268
$66.33 $58.761
- -W500110-S300
DRIVE ASY. (CAMSHAFT LH)Bolt- Bolt; M8x35mm; Front cassette attaching., SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HB1
- Callout Name: 6M289
$11.30 $6.612
- BALANCE SHAFT ASY. (ENGINE DYNAMIC)
-W702523-S300
Bolt- Balance shaft retaining bolts, SOHC
- Fit Note: 6 Cyl 4.0L
- Require Quantity: 4
- Package Quantity: 4
- Base Number: HB3
- Callout Name: 6A311
$45.00 $26.334 
-W702093-S300
Bolt- Retains sprocket to balance shaft, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HB4
- Callout Name: 6A311
$8.50 $4.971
XL2Z-6A311-AA
Jackshaft- Jackshaft with oil drive gear; When replacing shaft that has flats on front, also order F87Z-6M264-AA sprocket., SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6A311
- Replaced By: 7L2Z-6A311-A
$523.33 $354.821- F77Z-6A311-BB
Shaft - Balance- Balance shaft asy, 4x4 only
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6A311
- Replaced By: 1L2Z-6A311-AA
- $45.00 $26.334
- -W500014-S303
HARDWAREBolt And Washer Assy - Hex.Head- Callout Name: W500014-S303
- Replaced By: -W500014-S437
$3.25 $1.914
- PLATE (CAMSHAFT THRUST)-W500014-S303
Bolt And Washer Assy - Hex.Head- Bolt; M6x20; retains Jackshaft retainer to block, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6269
- Replaced By: -W500014-S437
$3.25 $1.914 
$4.67 $3.281
F77Z-6U001-AD
J BOLT (SPECIAL)Bolt - Special- Bolt with O-ring; M6x35mm; Retains lower rear cassette through hole in cylinder block., SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6U001
- Replaced By: 4L2Z-6U001-AA
$45.00 $30.781
F77Z-6C343-AA
SPROCKET (ENGINE BALANCE SHAFT)Sprocket- Balance shaft gear, SOHC
- Fit Note: 4.0L
- Base Number: 6C343
- Callout Name: 6C343
$53.00 $36.891
F87Z-6M264-AA
JACKSHAFT SPROCKET (FRONT)Sprocket- Large front jackshaft gear; W/O flats, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6M264
- Replaced By: 2U3Z-6M264-AA
$216.42 $118.821
$3.25 $1.914
- $8.50 $4.971
- $3.25 $1.914
F77Z-6A304-AB
GEAR (ENGINE BALANCE SHAFT DRIVEN)Gear- Only serviced in Jackshaft asy., SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 6A304
- Replaced By: 7L2Z-6A311-A
$523.33 $354.821
F77Z-6C341-AA
PLATE (BALANCE SHAFT THRUST)Spacer- Spacer at back of jackshaft, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 6C341
- Callout Name: 6C341
$27.50 $18.811
XU2Z-6M252-AA
GASKET (TIMING CHAIN TENSIONER)Gasket- Chain tensioner gasket, LH & RH
- Location: Driver Side & Passenger Side
- Base Number: 6M252
- Callout Name: 6M252
$7.62 $5.351
$2.60 $1.52
Genuine Ford Parts, the Right Choice
FordPartsGiant.com offers the wholesale prices for genuine 1999 Mercury Mountaineer parts. Parts like Timing Gear are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.0L. Transmission: 5AT 5R55E.