Should my shifter do this?

[Balls]

Whilst driving, if I let off the gas but keep it in gear, the shifter moves a good inch. When I step on the go pedal again, it moves back an inch again. It's done this for some time and I never really paid it any mind, but my boss brought it up to me the other day when he drove it. I have an eBay short shifter installed with poly bushings, all motor mounts were replaced about 2 years ago and stock clutch with a little over 100k on the clock. Is this normal?

 

[esnave09]

My first thought would be motor mounts, cuz mine does that too but didn't start until a few months ago when my exhaust started getting louder too (motor mounts giving out). But seeing as you replaced yours already... What brand mounts did you use?

 

[Balls]

Cheapest I could find on eBay! I inspected the side ones the other day and they are fine. Didn't feel like crawling under the car to check the rear.

 

[zackmac]

Totally your motor mounts.
Mine did this since the time I first got the car used, and just last weekend I put in AWR motor mounts (all 4)
Completely eliminated this issue
The difference is noticeable night and day, I Wish this was the first thing I did.
I have a TWM short throw shifter as well