If the steering joint angles don't match , the effect I describe can occur on the end with more angle.

Using a drive shaft as an example, as the trans output rotates at a constant speed, the drive shaft is constantly accelerating and decelerating as the u joint rotates. The rear u joint is in phase and hopefully at the same angle as the front, this causes the output end to regain constant speed.

The ratchet u joint and extension model is the best way to understand this process.

The reason CV ( Constant Velocity ) joints mostly found on front drive cars are called CV joints because the don't cause this speed up / slow down effect when bent on an angle.

With as much as you have changed in steering linkage, check rather than guess. An inch up / down + Forward / reverse + shorter steering arms = an unknown amount of bump steer

Here is another link.

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