4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE Transmission
Smart-Tech® High Capacity Forward Clutch Drum Kit
Part No. 76655-01K
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 - watch this video for details.
  • Increase clutch capacity by 20% without removing the wave plate
  • One-piece, forged drum design prevents cracking
Note
To replace an AOD cast forward drum requires updating related components with AODE versions. Update forward clutch pack with AODE style friction, steel and waved plates, backing plate and retaining ring. Additionally, do one of the following: either machine tips of reluctor from forward drum; OR update sun gear shell and reverse drum with AODE versions. See warning regarding riveted sun gear shell.
Contents
  • Drum High Capacity
  • Bottom Steel Plate .055" Thick

A NAME YOU CAN TRUST

As an industry veteran in the transmission parts supply business, you can buy with confidence.  Our goal is to provide high quality parts, an experienced sales force, and the highest levels of product availability possible.

Important Information
Shipping
Returns
Core Policy

As a buyer, it is your responsibility to verify that this product is compatible with your application.  For any general questions, technical support, or to verify part fitment please send us a message. Our support is free, and we typically respond within minutes. ​​​​​​​

Your order will be shipped within 1 business days (MON-FRI excluding holidays) of receiving payment and you should expect to receive it five to seven days via US Postal Service or UPS Ground Standard Shipping unless another shipping method is chosen.  In addition to UPS Ground, we offer expedited services as well as local pick-up. Please contact us if a quote is needed and we will be happy to work with you.


Please Note: All packages valued at over $500 WILL require a signature upon delivery. 


If your package arrives damaged, please do not open and contact us immediately. 


If your package is returned by the carrier due to address errors, you will be responsible for the shipping cost. 


International Customers:

Please make sure you monitor your package. Any import duty/taxes must be paid by the buyer. If you do not pay in a timely fashion your package will be returned. You will not receive a refund for the returned items until they’re delivered. Shipping fees will not be reimbursed. ​​​​​​​

30 Day return policy for unused, uninstalled items. Any product you return must be in the same condition you received it and in the original packaging.


If you’re having an issue with a used or remanufactured item and it’s been installed, we require the buyer to contact us immediately so we can provide trouble shooting information. Worst case scenario if that fails, exchange only.


Certain item such as used items, tools, and one time use items are not eligible for return.  As a buyer, it is your responsibility to verify that this product is compatible with your application.​​​​​​​  If you ordered the wrong item for your application YOU are responsible for the return shipping. 


20% Restocking Fee May Apply


If you are purchasing an item in which a core charge is required, please be sure your contact information is current.  If core charge is not paid within 1 week of purchase, your order will be cancelled.


Upon receiving your new part, there will be a prepaid shipping label included so you can return your core (old part) to us free of charge. Please make sure to use the label we send you.


You have 14 days to ship your core back to us from the time your new part was delivered. If you do not ship the core within 14 days, you WILL LOSE YOUR REFUNDABLE CORE CHARGE. Exceptions are possible, BUT YOU MUST contact us to make us aware of the situation.


ATTENTION INTERNATIONAL BUYERS: Due to the inflation of shipping costs, we are unable to pay for the return shipping on the core. If you want the core charge refunded, you will have to pay for shipping. We apologize for any inconvenience this may cause.


Once your core is delivered, please allow 3-5 business days for your refund to be processed.


See our other items

4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE Transmission Smart-Tech® High Capacity Forward Clutch Drum Kit Part No. 76655-01K 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 - watch this video for details. ---Increase clutch capacity by 20% without removing the wave plate ---One-piece, forged drum design prevents cracking Note To replace an AOD cast forward drum requires updating related components with AODE versions. Update forward clutch pack with AODE style friction, steel and waved plates, backing plate and retaining ring. Additionally, do one of the following: either machine tips of reluctor from forward drum; OR update sun gear shell and reverse drum with AODE versions. See warning regarding riveted sun gear shell. Contents ---Drum High Capacity ---Bottom Steel Plate .055" Thick
4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE Transmission
Smart-Tech® High Capacity Forward Clutch Drum Kit
Part No. 76655-01K
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 - watch this video for details.
  • Increase clutch capacity by 20% without removing the wave plate
  • One-piece, forged drum design prevents cracking
Note
To replace an AOD cast forward drum requires updating related components with AODE versions. Update forward clutch pack with AODE style friction, steel and waved plates, backing plate and retaining ring. Additionally, do one of the following: either machine tips of reluctor from forward drum; OR update sun gear shell and reverse drum with AODE versions. See warning regarding riveted sun gear shell.
Contents
  • Drum High Capacity
  • Bottom Steel Plate .055" Thick

A NAME YOU CAN TRUST

As an industry veteran in the transmission parts supply business, you can buy with confidence.  Our goal is to provide high quality parts, an experienced sales force, and the highest levels of product availability possible.

As a buyer, it is your responsibility to verify that this product is compatible with your application.  For any general questions, technical support, or to verify part fitment please send us a message. Our support is free, and we typically respond within minutes. ​​​​​​​

Your order will be shipped within 1 business days (MON-FRI excluding holidays) of receiving payment and you should expect to receive it five to seven days via US Postal Service or UPS Ground Standard Shipping unless another shipping method is chosen.  In addition to UPS Ground, we offer expedited services as well as local pick-up. Please contact us if a quote is needed and we will be happy to work with you.


Please Note: All packages valued at over $500 WILL require a signature upon delivery. 


If your package arrives damaged, please do not open and contact us immediately. 


If your package is returned by the carrier due to address errors, you will be responsible for the shipping cost. 


International Customers:

Please make sure you monitor your package. Any import duty/taxes must be paid by the buyer. If you do not pay in a timely fashion your package will be returned. You will not receive a refund for the returned items until they’re delivered. Shipping fees will not be reimbursed. ​​​​​​​

30 Day return policy for unused, uninstalled items. Any product you return must be in the same condition you received it and in the original packaging.


If you’re having an issue with a used or remanufactured item and it’s been installed, we require the buyer to contact us immediately so we can provide trouble shooting information. Worst case scenario if that fails, exchange only.


Certain item such as used items, tools, and one time use items are not eligible for return.  As a buyer, it is your responsibility to verify that this product is compatible with your application.​​​​​​​  If you ordered the wrong item for your application YOU are responsible for the return shipping. 


20% Restocking Fee May Apply


If you are purchasing an item in which a core charge is required, please be sure your contact information is current.  If core charge is not paid within 1 week of purchase, your order will be cancelled.


Upon receiving your new part, there will be a prepaid shipping label included so you can return your core (old part) to us free of charge. Please make sure to use the label we send you.


You have 14 days to ship your core back to us from the time your new part was delivered. If you do not ship the core within 14 days, you WILL LOSE YOUR REFUNDABLE CORE CHARGE. Exceptions are possible, BUT YOU MUST contact us to make us aware of the situation.


ATTENTION INTERNATIONAL BUYERS: Due to the inflation of shipping costs, we are unable to pay for the return shipping on the core. If you want the core charge refunded, you will have to pay for shipping. We apologize for any inconvenience this may cause.


Once your core is delivered, please allow 3-5 business days for your refund to be processed.


See our other items