Quote:
Originally Posted by 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.
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. Thoughts?
Regards, T.J.
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My '62 Suburban came from the factory with 3.92 gears. Prior to my purchase 25 years ago, someone had changed the rear gears to 3.54, but neglected to do anything with the front end. I found that out after driving it 1300 miles from Phoenix, AZ, and attempting to drive up my steep gravel driveway. After I locked in the hubs and put the T-case in 4 high, the truck refused to move forward more than a few inches. That's when I realized the mis-match in gears. I had a local 4x4 shop change the front to 3.54 to match the rear. With 32" tall tires I have no problem with freeway cruising. It turns 2600 RPM at 70 MPH.