OD trans

Here's your fix. The Ultimate Mopar A-833 4-Speed Fix: Get Overdrive & Strength!

This solves the gear spread issue and gets you OD in ANY case. Passon sells bearing retainer reducers or the other way around. I'm currently in process of doing this myself.

Pretty sure the only way to get that setup now is to buy a complete trans for $3600. Can't find just the gears and cluster on his website anymore.

Funny thing is, with a 3.09/1:1 box you get similar results. Might not be as strong, but could be a fair amount cheaper. Just run a 3.23 rear gear and it is a close match the Hemi OD with 4.10.