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Sonnax

4R70W Master Rebuild Kit with Stage 1 Frictions & Forward Clutch Drum Kit 96-03

Regular price $519.99 USD
Regular price Sale price $519.99 USD
Sale Sold out
Shipping calculated at checkout.

4R70W High Performance Master Rebuild Kit for FORD vehicles 1996-2003


This listing includes:


Gasket and Seal Overhaul Kit
Raybestos Stage 1 Friction Module
Sonnax Smart-Tech High Capacity Forward Clutch Drum Kit 76655-01K
Steel Plate Module
Filter
Kevlar Front Overdrive Band
Kevlar Low Reverse Band

4R70W has a 14 bolt pan


OVERHAUL KIT Contains all Paper gaskets, Pan gasket, rubber lip seals, metal clad seals, sealing rings and rubber o-rings


 

Stage-1 is truly a performance friction. It's not only a racing clutch but can cross over to the heavy duty market with a high mileage durability. It is an economical performance solution offering greater holding capacity, durability, and less wear than other red performance friction plates. Good up to 550 HP.


Advantages
  • Withstands high horsepower
  • Greater Torque capacity
  • Maintains piston travel
  • Optimum performance
  • Higher heat resistance
  • Smooth engagements
  • Enhanced shift feel

Forward clutch durability is an issue in listed Ford performance applications. This problem often is addressed by eliminating the wave plate to fit more clutches, but plate removal creates harsh engagements and affects shift timing. Another common failure of stamped drums is cracking at the snap ring groove. The unique design of the Sonnax Smart-Tech high capacity forward clutch drum kit 76655-01K increases clutch capacity without abandoning the wave plate. The forged, one-piece drum prevents clutch drum breakage by eliminating weakness at critical stress points.

Increase Clutch Capacity, No Modifications Required
The physically larger clutch pack area in the Sonnax drum kit increases capacity by 20% when using six OE-thickness frictions and steels. Using OE-thickness steels maximizes heat dissipation to prevent burnt clutches.

Prevent Clutch Drum Breakage
The manufacturing process of the OE snap ring groove creates high-stress points around the circumference of the forward drum. The drum is active in 1st, 2nd and 3rd gear ranges and suffers the most abuse on a forced 4-3 kick down when it reapplies at higher pressure. The concurrent pressure from the forward clutch piston combined with the high stress at the snap ring groove causes the upper portion of the drum to split and separate at the groove. Depending on severity of the crack, this can result in no forward engagement or slipping in 1st, 2nd and 3rd gear. The one-piece, forged Sonnax drum kit is more durable than stamped drums and features increased groove depth for additional ring support. These are the same features found in the Smart-Tech standard capacity drum 76654-01K

  • Increase clutch capacity by 20% without removing the wave plate
  • One-piece, forged drum design prevents cracking

To replace an AOD cast forward drum requires updating the clutch pack with AODE style friction, steel & waved plates, backing plate and retaining ring. Cannot be used with '04-'05 riveted style sun gear shell. Replace sun shell with later design without rivets.

  • Drum High Capacity
  • Bottom Steel Plate .055" Thick

Parts ship daily from our distribution center.


FREE SHIPPING on US Orders



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