[TRybas]

Looking for some guidance/ confirmation from anyone that has changed out the ring and pinion to get a little more high end out of the old girl. I’ve read through what I could find here and have talked to Jake about his setup. Not trying to get in a debate here about them being old work horses not meant for speed yada yada yada. Please keep it to the mechanics.

Seems doable than I got to reading somewhere about different thickness gears so I called spicer tech support to confirm. The gentlemen from spicer seemed knowledgeable and said to go lower than 3.92 (current setup) I would have to change out the carrier as well which they do not offer.

My goal is to be able to cruise around 60-65mph. My current set up is 1960 V6 305A 4-wheel-drive with an SM420. Dana 44 front and back at 3.92.

I was looking at the 3.54 part# 22856-5x or the 3.31 part# 706017-2x. Obviously my truck is 4x4 so I’d have to do both front and rear. Could get pricey and I don’t want to start pulling things apart to find I didn’t order the right stuff. If someone could confirm they have done so and specific parts it would be greatly appreciated.

I’ve also considered putting a gear vendor overdrive so I gave them a call. Their bolt on over drive is 14” long (and back ordered for several months). Taking 14” out of the drive shaft would put it at a pretty sharp angle. Not sure I am comfortable doing that. (See pics) Thoughts?

Regards, T.J.