Converting to 3/4 ton Is a new rear drive shaft needed

[cegusman]

I just picked up a 3/4t dana 44, and a 3/4t 14 bolt FF, I now it is a direct swapin but am I going too have to get custom drive shafts made or are the ujoints the same as the 1/2t 10 bolts?

Houston, TX

 

[BurbinOR]

Re: Converting to 3/4 ton

The front should be a direct match for your u-joint......the rear will take one of two choices of ujoints. My '79 needed Napa ujoint #348 (as did Mudhog's '77) to hook up to the 14B, if that doesn't work the Napa #447 is the one. The later Blazers (not sure which year) takes the 447..........

<font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>

 

[greg83k5]

Re: Converting to 3/4 ton

somebody told me 83 and later takes the #447, which i picked up today at o'reilleys for 27 dollars....

where'd you score your axles at in houston? i have to get the 3/4 ton hubs and backing plates....

 

[cegusman]

Re: Converting to 3/4 ton

Do I have to get a new rear drive shaft? I picked up my axles form a coloradok5 user in Collage Station.

Houston, TX

 

[Zepplin]

Re: Converting to 3/4 ton

When I put my 14bolt ff under my 74, with a NP203, I only had to buy the new hybrid U-joint. The 14 bolt will actually need a shorter driveshaft maybe a 1/2" or 3/4" or so. But, I already had a slip-style driveshaft so I was good to go.

74 Blazer
Zepplin
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