MMM Differential Assembly (P5)

Nicola

Straight cut crownwheel and pinion sets have become available during recent years. They do not offer significant advantages. They are particularly noisy (even when correctly set-up) are basically for race cars, and have little, if any cost advantage and are best avoided whilst original stocks of spiral bevel units can still be purchased.

CodeDescriptionExcluding VATUnit of SaleIllustration Number
MG0104AP/M3/ Rear axle dif cover (without oil filler)Each2
MG0105AM5/L/ Rear axle dif cover (with oil filler)Each2A
MG0105BM5/L/ Dif cover oil filler plug & washerEach2B
MG0106AM1/M2/M3/ Dif cover gasket£3.40Each3
MG0106BM1/M2/N/ Dif to axle spacer ring£15.00Each3
MG0107AAll/ 8 bolt crown wheel & pinnion (4 star difs) 8:39 7:37£450.00Each5
MG0107Z2nd hand 8 bolt crown wheel & pinnion (4 star difs)£50.00Each5
MG0108AM6/M2/ 6 bolt crown wheel & pinnion (2 star difs) 7:37 8:43£450.00Each5A
MG0108Z2nd hand 6 bolt crown wheel & pinnion (2 star difs)£50.00Each5A
MG0109ZAll/ 8 bolt housing for 4 star dif centre (2 parts)£150.00Each6
MG0110ZM5/L/ 6 bolt housing for 2 star dif centre (2 parts)£100.00Each6A
MG0111ZAll/ Spider 4 star dif assyEach7
MG0112ZM5/L/ Spider 2 star dif assyEach7A
MG0113ZAll/ Differential gear£25.00Each8
MG0114ZAll/ Planet (star) wheels£25.002 or 49
MG0115ZM1/M2/N/ Bolt for crown wheel & pinnion£6.50Each10
MG0116AM1/M2/N/TA/ Differential carrier bearing£43.93Each11
MG0116BT3/ Differential carrier bearingEach11
MG0117AM1/M2/N/ Tab washer£3.25Each12
MG0117BT3/ Tab washer£3.25Each12
MG0118BT3/ Adjustable lock nutEach13
MG0118ZALL/ Adjustable lock nut£5.00Each13
MG0119ZP/N/ Dif case c/w bearing caps (with oil filler plug)Each14
MG0120ZM/D/F/J/M2/ Dif case c/w bearing caps (no oil filler plug)Each14A
MG0121ZM1/M2/N/ Pinnion bearing circlip£2.25Each15
MG0122AM1/M2/N/ Pinnion bearing rear (roller type)£65.00Each16
MG0123ZAll/ Pinnion housing£50.00Each17
MG0124ZM1/M2/N/ Pinion bearing distance tube£39.95Each18
MG0125AM/D/F/J/M2/ Pinnion bearing front - standard raceEach19
MG0126ZP/N/ Pinnion bearing front - Heavy duty bronze cage£70.00Each19A
MG0127AM1/M2/N/ Pinion housing shim 0.003£3.00Each20
MG0127BM1/M2/N/ Pinion housing shim 0.010£3.50Each20
MG0127CM1/M2/N/ Pinion housing shim 0.020£3.75Each20
MG0128ZM1/M2/N/ Pinnion housing end cap£46.35Each21
MG0129ZM/ Pinion to prop shaft flange (3 prong type)Each22
MG0130AProp shaft joint bolts£3.20Each
MG0130ZD/F/J/M2/ Pinion to prop shaft flange (6 bolt round type)Each23A
MG0131ZP/N/ Pinion to prop shaft flange (4 bolt square type)Each22B
MG0132ZM1/M2/N/ Pinnion spacer, washer & nut£0.15Each23
MG0133ASH Prop shaft - J2£95.00Each
MG0133BSH Prop shaft -NA NB£95.00Each
MG0133CSH Prop shaft -PA£95.00Each
MG0133DSH Prop shaft PB£95.00Each
MG0133ESH Prop shaft£95.00Each
MG0135ZAll/ Complete differential assy £750.00Each

The basic differential assemblies shown above cover the design and operation of all MMM differentials.

  • 2-STAR assemblies were originally fitted as standard to the following models: M, D, F, J, L and used a 6 bolt crownwheel and pinion assembly of ratios 9:44 (M type only); 8:43; 7:37; 8:39 (suitable for all models).
  • 4-STAR assemblies were originally fitted as standard to the following models: P,K, N and they used an 8 bolt crownwheel and pinion assembly of ratios 8:43; 7:37; 8:39; (10:52; 9:39; 9:44; 9:52 K types).

N.B. It is quite acceptable to fit the stronger 4-STAR assemblies into the models that originally used 2-STAR units. However, all 6-bolt crownwheel and pinion assemblies only use a 2-STAR centre. 8-bolt crownwheel and pinion assemblies can use either 2-STAR or a 4-STAR centre, and those using a 2-STAR centre can be altered to 4-STAR if required, by purchasing part Nos. 109, 111, 114 (x2).