A/T - 4R70W Clunk Noise on 2nd to 1st Gear Downshift
5.
Remove the transmission from the vehicle and disassemble down to and including the Center Support Retaining Ring. Refer to Workshop Manual
section 307-01.
6.
Note the position of the Planet Support Spring. Compare to the correct installation which is illustrated in Figure 1. One tang of the Planet Support
Spring should be loaded against the transmission case. The other tang should be loaded against the Planetary Gear Support.
7.
Unless the Planet Support Spring is damaged, it may be reinstalled in the transmission correctly. If the spring is damaged, replace with part
number F5AZ-7F277-AA.
8.
Install the Planet Support Spring in the position illustrated in Figure 1. Use a flat/wide tool, that will apply equal force across the spring. This will
ensure the spring is installed squarely with the tangs loading the Transmission Case on one side and the Planetary Gear Support on the other.
9.
Reassemble and install the transmission. Replace the Pump Gasket during reassembly. Part number F2VY-7A136-A.
10.
Lower vehicle, refill fluid to correct level and verity repair.
