Axle Swap? My 4.10 for your 3.42?

[elhombre]

I've got a 94 1 ton 4wd duallie with 4.10 gears and g80 limited slip (gov-lock). Would like to trade for the same running gear but with 3.42 gears. I would consider a SRW. If you're not too far away, we could meet halfway and find a shop to swap them in. e-mail me at elhombresd at yahoo dot com if you think we can work something out.

Thanks,

Adam

[DmaxMaverick]

Welcome to the Forums!

That's a tough bill to fill. 3.42 was not available OEM on the 3/4 or 1 tons. Aftermarket R&P's are available (when they're not out of stock). If someone has a 3.42 in a 14 bolt FF, it's likely they've upgraded it for a reason. Lots of 3.73's out there, though. Keep in mind, whichever way you go, you have to do the front, too. Good luck.

[DA BIG ONE]

Try; pirate4x4.com their classified ads show 1,000's of rears for sale. Keep in mind 3.42's are hard to impossible to find in a GMC 14 bolt ff.

[6.5 Detroit Diesel]

Around here, the majority of FF carriers that we remove are 3.42's. We usually take off the ring gear. 3.42's shouldn't be that hard to find, especially with older gasser 3/4 tons. I even have a FF Carrier with a 3.23 gear set and matching pinion.

[quickv6]

I've got a 94 1 ton 4wd duallie with 4.10 gears and g80 limited slip (gov-lock). Would like to trade for the same running gear but with 3.42 gears. I would consider a SRW. If you're not too far away, we could meet halfway and find a shop to swap them in. e-mail me at elhombresd at yahoo dot com if you think we can work something out.

Thanks,

Adam

I am looking to do the same thing. (Not whole rear)4.10/3.42 The only gear I have found is after market. The GM gear was discontinued. Good Luck

[elhombre]

Following 6.5 Detroit's message, I looked at some online salvage places. Plenty of 3.42s in 3/4 ton axles. For front axles, you can get an 8 bolt 3.42. For the rear, 4x4 Full Floating 8 bolt turns up plenty as well. Locking, non-locking, and some say 10.5 inch.

Can I bolt 3/4 running gear right on? Or is it better to have an aftermarket gear set put in? Nice new gears, right? Seems like a job best left to a specialty shop--I'm sure not doing it!

Thoughts please?

[DA BIG ONE]

The front 9.25" IFS diff used in later 2500 Burbs and 3500 trucks has a 14 bolt case and is rated 8,600 lb+, if going to a straight axle then a Ford dana 70 driverside drop is best choice.

I'll be pulling my GM 3.42's soon and will put them on market.