E4OD, 4R100

Symptoms:

• Excess wear of center support & case lugs at contact points
• Input drum wear at the center support

Cause:
Slight motion of center support as intermediate clutch piston applies and releases.

Correction:
The Sonnax support ring increases the contact area between the center support and the case and helps keep the center support in alignment, greatly reducing center support wear.

The OE rear case bushings in the Ford E4OD and 4R100 transmissions tend to wear out prematurely. Bushing failure may be due to lack of lubrication, excessive journal clearance, or too much load for a given bearing area. Replace the two OE bushings with Sonnax rear case bushing 36008B or 36008D using the Sonnax installation tool T36008A to draw the replacement bushing into place. Both one-piece replacement bushings are an improvement over the OE two-bushing design because of their increased bearing surface area and superior lubrication characteristics.

• Increased contact area at both center support and case reduces wear
• Salvages worn center support
• Keeps center support in alignment
• Minimizes drum wear at the support

SONNAX Installation Instructions