86-95 Ring & Pinions, Bearings, and Seals

86-95 Differentials

For 86 through 92, the RX-7 uses a very long pinion gear, with independent rear suspension. The front flange is not interchangeable between turbo and non-turbo differentials. However, the diameter of the driveshaft register is the same, so there is some possible swapping if the driveshaft or flange is re-drilled. The turbo driveshaft has a larger flange and bolt pattern, as well as a larger diameter yoke at the front, where it goes into the transmission. The 86-88 automatic driveshaft has this larger front yoke also, yet has the smaller rear flange for non-turbo diffs. The half-shaft bolt pattern (and CV joint) is larger on the turbo, but the length, and outer spline at the hub, are all the same. Rear axle ratio choices are limited.

The 93-95 pinion gears are shorter than the 86-92 gears.

Ring and Pinion Sets
	86-92 3.91 Non-turbo (Automatic and Convertible only)	27-110A-M067
	86-92 4.30 Non-turbo	27-110A-M066
	86-92 4.30 Turbo	27-110B-P092
	93-95 4.30	27-110A-P0A5

Ring and Pinion Set-Up Pieces
Image	Description	86-92 Non Turbo	86-92 Turbo	93-95
	Lock nut	27-0300-0223	27-0300-0223	27-0300-0223
	Pinion seal	27-1650-M055	27-1650-P090	27-1650-R001
	Front pinion bearing 2 Required	27-1430-M055	27-1430-P016	27-2200-0604
	Spacer tube	27-172B-M055	27-172B-P016	N/A
	Middle pinion bearing	27-2100-0755	27-2200-0604	N/A
	Collapsing sleeve/collar	27-1710-M035	27-1710-0305	27-171A-R004
	Rear pinion bearing	27-2100-M025	27-2100-M025	27-2100-R001
	Side axle seal	27-238B-F003	27-2380-P016	27-238A-P043
	Side carrier bearing	27-3500-0221	27-350A-0118	27-350A-0118

Pinion Depth Spacers
	Pinion Depth Spacer 3.47 mm	27-415A-0223
	Pinion Depth Spacer 3.29 mm	27-408A-0223
	Pinion Depth Spacer 3.23 mm	27-406A-0223
	Pinion Depth Spacer 3.08 mm	27-401A-0223

Differential Carrier Shim for 93-95 RX-7s and RX-8s
Image	Size	Part Number
	5.50 MM	27-3550-R001
	5.60 MM	27-3570-R001
	5.65 MM	27-3580-R001
	5.70 MM	27-3590-R001
	5.75 MM	27-3560-R001
	5.80 MM	27-3610-R001
	5.85 MM	27-3620-R001
	5.90 MM	27-3630-R001
	5.95 MM	27-3640-R001
	6.00 MM	27-3650-R001
	6.05 MM	27-3660-R001
	6.10 MM	27-3670-R001
	6.15 MM	27-3680-R001
	6.20 MM	27-3690-R001
	6.25 MM	27-3710-R001
	6.30 MM	27-3720-R001
	6.35 MM	27-3730-R001
	6.40 MM	27-3740-R001
	6.50 MM	27-3750-R001

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