Mack hasn't been on the forum since mid-July, and for some reason I totally missed his last post and sadly apparently everyone else did, too.

Quote Originally Posted by Mack57 View Post
Roger,
Thank you for the pinion angle explanation & I need to follow through on that. But, the prob seems to happen as soon as it's in gear, not rolling. The motor bogs down.
Recently replaced the tranny(th350) crossmember lifting the trans approx 2.5". The only thing that I can think of that changed was the shifter linkage & it does slip out if gear now. However, could the linkage be causing the "bog"? By not allowing the tranny to lock in gear?
What do you think?
Mack,
It definitely sounds like you've got the linkage binding after lifting the tranny crossmember 2.5". If it's slipping out of gear you've got a problem, but I don't see that causing a "bog", but that may be terminology. Put the tranny in park, unhook your linkage, ensure that your shifter is locked in Park and adjust your linkage to fit freely, with no bind. With the engine off, check the opposite extreme for position, too, pulling the linkage with the shifter in your lowest forward gear, and ensuring that the tranny lever is in it's detent position.

Sorry for the lack of response, and hopefully you figured it out four months ago without us!