Northland Automatic Transmission Service, Inc.

Since 1978

A4LD

Ford  C3,  A4LD, & 4R44E, 4R55E, & 5R55E  Transmissions

Black Series

Kit Picture

Apply oil for both the overdrive and intermediate servos in Ford's A4LD and it's electronic four and five speed successors, the 4R44E, 4R55E, and 5R55E, is routed through the hollow servo pins.  This requires the pin to seal in the case. From the factory, this system works fine, but as the transmission ages and the servos go through many apply and release cycles, the case wears, creating a leak.  This wear is compounded on the 5R55E, as it uses the overdrive servo for Second gear as well as Fifth.  Not only does this wear leak apply, but it also allows release oil to escape, causing delayed engagements and dragging bands. 

Bore Wear

Note the ridge worn in the pin bore.

Look just in front of the feed hole.

The A4LD kit contains tooling necessary to repair both the Overdrive and Intermediate servo pin bores.  We save your case by reaming out the case and installing a brass bushing that has proven to wear considerably better than the stock aluminum case.  Due to the design of the pin bores, the A4LD kit requires a special reamer, as use of the 5/8" reamer does not leave adequate material to safely install a bushing.  The A4LD is a BLACK series kit, and is available as either a Master (pictured) or a Sub kit.

Instructions 

A4LD

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