Page 570 - 2021-22 Auto Performance_Circle Track

Performance Ring and Pinion Sets
Performance 8620 steel ring and pinion sets are heat-treated and engineered for racing applications. Available “AX” gear sets for Ford 9" are approximately two pounds lighter.
Standard Set “AX” Set Part No. Part No.
Ratio
Teeth
Standard Set Part No.
“AX” Set
Part No. Ratio Teeth
Ford 8.8" 30-Spline 1.626" Dia. Pinion
MOTF888390
—
3.90
43-11
MOTF888410
—
4.10
41-10
MOTF888456
—
4.56
41-9
MOTF888514
—
5.14
36-7
Ford 9" 28-Spline 1.313" Dia. Pinion
MOTF890300
—
3.00
39-13
MOTF890325
—
3.25
39-12
MOTF890350
—
3.50
35-10
MOTF890370
—
3.70
37-10
MOTF890411
—
4.11
37-9
MOTF890430
—
4.30
43-10
MOTF890457
—
4.57
32-7
MOTF890486
—
4.86
34-7
MOTF890514
—
5.14
36-7
—
MOTF890529AX
5.29
37-7
—
MOTF890537AX
5.37
43-8
MOTF890543
—
5.43
38-7
—
MOTF890557AX
5.57
39-7
MOTF890583
MOTF890583AX
5.83
35-6
Ford 9" 28-Spline 1.313" Dia. Pinion
MOTF890600
MOTF890600AX
6.00
36-6
—
MOTF890614AX
6.14
43-7
MOTF890620
MOTF890620AX
6.20
31-5
MOTF890633
MOTF890633AX
6.33
38-6
MOTF890650
MOTF890650AX
6.50
39-6
—
MOTF890666AX
6.66
40-6
—
MOTF890683AX
6.83
41-6
—
MOTF890700AX
7.00
42-6
—
MOTF890716AX
7.16
43-6
—
MOTF890733AX
7.33
44-6
GM 10-Bolt 7.5"/7.625" 27-Spline 1.438" Dia. Pinion
MOTG875390
—
3.90
43-11
MOTG875410
—
4.10
41-10
GM 10-Bolt 8.5" 30-Spline 1.626" Dia. Pinion
MOTG885410
—
4.10
41-10
MOTG885456
—
4.56
41-9
GM 12-Bolt Chevy 8.875" 30-Spline 1.625" Dia. Pinion
MOTG888411
—
4.10
41-10
Differential Master Bearing Kits NEW!
Popular Differential Replacement Components NEW!
Lightweight “AX” Ring and Pinion Set
Kits include everything to over- haul a differential: pinion bearings and shims, pinion seal, carrier bearings and shims, pilot bearing (where applicable), gear mark- ing compound and brush, crush sleeve, pinion nut, loctite, cover gasket/RTV, and ring gear bolts.
Part No.
* With LM501310 and LM501349 bearings. † With LM102910 and LM102949 bearings.
MOT5110
MOTD5AZ4035A
Description
MOT5122
Description
MOT1260823
MOT14066913
MOTRA310RMK
Ford 8", 25-Spline, 1.188" Pinion, 1964-80
MOTR8.8RMK
Ford 8.8", 30-Spline, 1.626" Pinion, 1981-Up Exc. I.R.S.
MOTR9RMK†
Ford 9", 28-Spline, 2.891" Housing, 1957-86
MOTR9R28MK*
Ford 9", 28-Spline, 2.891" Housing, Late Model
MOTR10REMK
GM 8.5" 10-Bolt, 30-Spline, 1.625" Pinion, 1970-99
MOTR10RLMK
GM 8.5" 10-Bolt, 30-Spline, 1.625" Pinion, 1999-Up
MOTF9RBKP
Part No.
MOT1260823
Pinion Nut, GM 7.5"/7.625"/8.5"
MOT14066913
Ring Gear Bolt, GM 7.5"/7.625"/8.5", Each
MOT5110
Cover Gasket, GM 7.5"/7.625", 1973-10
MOT5122
Cover Gasket, Ford 8.8", 1979-15
MOTD5AZ4035A
Cover Gasket, Ford 9", 1957-86
MOTF9RBKP
Ring Gear Bolt Kit, Ford 8"/9", (10) Bolts & (10) Washers
Mini Installation Kits NEW!
necessary to properly install a ring

carrier shims, pinion nut, ring gear bolts, gear marking compound, pinion seal, crush sleeve, brush, and cover gasket or RTV.
Part No. Description
MOTF8.8IK
Ford 8.8"
MOTF9IK
Ford 9", 28-Spline
MOTGM8.5IK
GM 10-Bolt 8.5"
568 TRACK
CIRCLE 2021-22
BRIAN CAMPBELL
STEVE DATEMA