Shudder in reverse

What could cause the vehicle to shudder in reverse under a load?

460bronco wrote:What could cause the vehicle to shudder in reverse under a load?

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What trans ? Could be warn low revers clutch seals warpped clutch plates. Modulator or the modulator valve inside the case sticking . Check fluid level and condition as well as do a fluid pressure test.

I disassembled the trans today and several of the low/ reverse steels had blue spots around them... Guess these were the hot spots causing the shudder.