Sonnax Oversize Servo & Accumulator Piston Kit 46RE 47RE 48RE A727

Description

Sonnax Hi-Performance
2nd Gear Super Hold Servo &
Accumulator Piston Kit
2nd Gear Super Hold Servo Kit
Cover
Piston
Sleeve
Pin
Retaining Ring
Seals/Seal Rings (5)
O-Rings (3)
This Sonnax 2nd gear servo offers 16% more apply area than the OE servo and is the largest and most leak-free servo available.
The small and large diameters of both the piston and cover have improved sealing which eliminates cross leaks and results in 15% less leakage than other designs. Less leakage means there is more pump volume available for the converter and to maintain line pressure.
The rubber and PTFE seals enhance positive sealing and prevent piston contact and bore scuffing. The smaller diameter apply pin gives more area to the release side of the servo where direct clutch oil pushes the servo off during the 2-3 shift.
This increased area balances against the greater 2nd apply area to maintain a favorable apply-to-release area ratio and minimize shift overlap on the 2-3 shift. The overall result is more holding force in 2nd, firmer 1-2 and 2-3 shifts that become firmer under load.
For higher horsepower applications, this servo reduces the need for aggressive lever ratios, excessively high line pressure and other more radical modifications in order to get firmer shifts.
16% more apply area provides more band holding power in 2nd gear
One easy-to-install part improves 1-2 and 2-3 shifts
Improved seal design conserves pump volume
Annodized aluminum for increased durability
Accumulator Piston Kit
OE plastic accumulators are prone to breaking and have poor sealing qualities, and metal rings currently offered with aftermarket accumulators also have issues with sealing.
Sonnax accumulator piston kit for Chrysler 727,  42-46-47-48RH/RE transmissions features a stronger piston made from anodized billet aluminum and a dual seal design.
The piston’s PTFEs seals prevent piston-to-bore contact and the D-rings vastly improve sealing compared to aftermarket steel rings.
Piston
PTFE Scarf-Cut Seal, Large
PTFE Scarf-Cut Seal, Small
D-Ring Large
D-Ring Small
Anodized billet aluminum for extra strength
Dual seal design for superior sealing
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