View Full Version : 1/2 to 3/4 ton conversion

12-19-2005, 02:07 PM
I have a 77 blazer and was wondering how difficult it is to upgrade to 3/4 or 1 ton and what all i would have to change. any info would help, thanx guys

12-19-2005, 02:52 PM
buy my front axle.. find a 14 bolt.. ur done yo....



12-19-2005, 03:07 PM
lol do i have to get new driveshafts, springs, steering components? I live in Penticton how far away are you? how much will it cost me all together?

12-19-2005, 03:14 PM
you'll need a rear shaft front will be fine.. dont need springs or steering .. ii'm down on the coast.. there are lots of cool people on this site who live up there who wil and can help ya out...



12-19-2005, 09:01 PM
you can also get a conversion ujoint if you can't find a bigger rear shaft

Andrew Goll
12-20-2005, 01:05 PM
just go to pick a dick and keep amn eye out for 3/4 ton axles

12-20-2005, 07:57 PM
what gearing are you looking for. I may have a 14bff for sale.

i am smart, S.M.R.T., i am smart, S.M.R.T.

12-21-2005, 09:19 PM
thanx, i will check out pick a part next week. I greatly appreciate the help and such a quick response.[36]

Rebulon Refurbulater
12-27-2005, 04:58 PM
you should also look for th400 and 205 case.....or np465 i believe....if yer lookin to be 3 quarter or 1 ton

12-27-2005, 10:18 PM
i have a couple transfer cases.How do i know what kind they are?

12-28-2005, 06:42 AM
quote:Originally posted by burbman

you can also get a conversion ujoint if you can't find a bigger rear shaft

thats what I got..works so far. [cheers]


12-28-2005, 08:25 AM
the 1ton is worth it if your really banging on you truck or going to run tires bigger the 38. if your not that had core and only want to run smaller tires that 3/4 ton is alot more afordable and easeier to come by I have a set in my back yard [c] as for the swap it's preaty straight forward axles will bolt up (i believe there is 2 different width for the rear spring mouts just have to measure your so you can get the right axle.)I'd try and get the 14ff for the back it's easy to find and cheap it's a 1 ton come's in 3/4 tons to mostly in the camper speacial tought. Other things to look at is you might have to get the pitman arm. I'd get drive shafts you can get cross over u joints but i don't recomend them cause i've seen a few break. Oh and you'll need new rims. pm me if your interested in the axel i'm in pen to bro

01-02-2006, 09:13 AM
the only difference between a 1 ton and a 3/4ton is the front axel in the 3/4ton its a dana44hd and in the 1ton its a dana 60. What u can do is get a dana 44 HD and switch the axle shafts out for the dana 60 style ones. Theres a guy down here near me (by the cost) that is running that in a fullsize truck with a 502 and 42' swampers and he hasn't had a problem, its called a dana 60 swap kit i believe. If u want to go the one ton route then make sure you get the king pin style dana 60 cause the other one is no good if you want to put big tires on. Ofcourse it all depends what your budget is, do the 60 if u can but there are other options around if u cannot. it is possible to run 44s on the dana 44 but u have to build it up and by the time your done with that it will cost about the same as a 60. One thing u also have to remember is that if u have a big lift to run those tires u may have to consider cutting and rolling your front axel to correct the pinion angle, doing this to a dana44 is not really wourth it. have fun!

01-05-2006, 08:50 PM
I'll probably be able to fit 40's with my current lift. But i do beat my shit pretty bad. I blew my rear diff and tranny in one outing a year ago. I'm gonna get 3/4 ton for now because its cheap and then when i blow it up i will try and find a dana 60. Thanx for the help everyone.

Rebulon Refurbulater
01-09-2006, 09:18 PM
:D the only experience i had with conversion joints is that they can be more expensive and sometimes harder to find off the shelf...........i eventually changed the driveshaft to match the yoke....it was the smaller of the two.....now the larger joint is cheaper and off the shelf........good luck