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older vacuum diff to live axle?


99RangerBoss

Well-Known Member
Joined
Mar 23, 2008
Messages
318
Age
37
City
Weinerpeg
Vehicle Year
2003
Transmission
Manual
hey guys do you know if you can switch the dana 35 live axle to a dana 35 vacuum diff? just outta curiousity are the mounts all still in the same place?
 
Assuming you're going to be doing this to an 03 truck, I know you can do it but I believe you will have to downgrade to the 98-99 steering knuckles and rotors. I'm not sure what else. You could swap everything over and buy the AVM manual hubs instead of running the vacuum lines for that setup. There is nothing wrong with running live axles though.
 
Take a look at peoples experiences with AVM/Rugged Ridge hubs..... They're not good...many go through them. Internal pieces are plastic. Though it is good though, they are the weakest link before the CV breaks. But they're problemmatic just like the PVH system in 98-99(and some 00) Rangers. There's a reason ford ditched the PVH and went with the tried and true Live Axle/Permanently engaged setup on 00+ trucks taken from the 95+ Explorer...

Ford tests showed very very very very minimal mileage loss with the live axle setup.


The diff doesn't matter.....doesn't have anything to do with the hubs..they're all the same(the axle itself). What does matter are the CV shafts, wheel bearings(and in turn the hubs), and knuckles.

I don't know if you're able to run PVH bearings + AVM hub(98-00) on a Live Axle knuckle(00.5+), or vice versa. Havn't dug too far into it to actually bolt on a Live Axle unibearing to an 98-99 hub. I think you can run the 98-99 parts on a 00+ knuckle....but am unsure. Superlifted a 98, 01, and 07 and I THINK you can. Removal of the hose barbs and fittings on the PVH parts would be required, but you can bolt on the manual hubs.

If I were you, I'd go live axle and use 03+ knuckles, that way you can run the larger brakes up front. And live axle is proven not to fail and a whole lot easier to work on.
 
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If I were you, I'd go live axle and use 03+ knuckles, that way you can run the larger brakes up front. And live axle is proven not to fail and a whole lot easier to work on.

That's precisely why I asked why anyone would want a system that fails. I haven't had any problems with mine thus far but who knows. I wish I had an 00+ so I could have the live axles.
 
If you were closer tom I would switch you even up. I would rather have the pvh setup and take the risk of the avm hubs.
 
When mine fails i'll probably go for the AVMs. I haven't decided yet. Still no need to switch as of now. I'm still trying to get it running right!
 
my only reason being is that i guy i know how a ifs differential from an explorer and i want to swap it into my truck and do the 4x4 conversion since i have a edge i know everyone says its not worth it but w/e i love my truck and i don't want to sell it and get something older thats in my price range! and plus i want lockable hubs!
 
lol parts are coming in a couple weeks i hope i gotta get monies first then i gotta source a manual transmission for a 3.0 with a transfer case output on it and there are none here in winnipeg that i can find so yeah thats a hold up and sourcing a manual transfer case is too lol.
 
I'd rather have the live axle, it's little stronger. Hell a lot of times my hubs stay locked on my 94.
 
apparently the diff is a live one because its from the semi AWD explorers and the guy told me these types have a front live axle so yeah then maybe later ill upgrade the knuckles to the newer one so i can run larger discs
 

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