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07-08-2010
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Established Member
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Join Date: May 2010
Posts: 119 What Jeep do I drive?: XJ
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Full Time 4WD helping Dana 35 rear
Hi All,
Just looking for some advice on using full time 4wd with large tyres on to help take some strain off the dana 35 rear diff.
The only reason i ask is that after whacking some large 31's on my XJ it seems to straining a little more than with the 29's.
So yeah, is it okay to run the car in full time 4wd constantly?
//This is only when I have the 31's on. For everyday driving I run 29's.
Cheers
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07-08-2010
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So play on just play on
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Join Date: Dec 2002
Location: Sydney
Age: 54
Posts: 6,075
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So the 31's are for offroad, if so run it in 4WD offroad anyway, for the road stuff just leave it on 2WD even with the 31's on. Shock loading is what kills the D35, and the housing flexing, if it's getting loads like this you should be in 4WD anyway.
Cheers
Steve
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Last edited by Steve F; 07-08-2010 at 07:30 PM.
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08-08-2010
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RustysRocker
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Join Date: Dec 2008
Location: Central Tablelands
Age: 42
Posts: 501 What Jeep do I drive?: XJ
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It's straining more with 31's due to the gearing being setup for standard. Think of it like using a spanner, holding it from the end (standard tyres) requires less effort than holding it from the centre (larger tyres).
I used to use full time when I had stock tyres on in the wet as the back had a tendency to let go otherwise. With the Lokka in front I'm basically excluded from being able to use it on the road any more, but we tow a horse float up to 2t with 30s in RWD without any problems.
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08-08-2010
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Established Member
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Join Date: May 2010
Posts: 119 What Jeep do I drive?: XJ
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Thanks for the responses guys.
Yeah I'd just heard so many bad stories about the Dana35s thought it might be good just to take a bit of strain off the rear axle.
Also quickly, is it true you can't go above a 31" tyre with the Dana35?
Cheers
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08-08-2010
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So play on just play on
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Join Date: Dec 2002
Location: Sydney
Age: 54
Posts: 6,075
Likes: 22
Liked 359 Times in 182 Posts
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I ran 32's (and still do but on a D44) for 3 years on my D35, I only totally destroyed it (busted axle, busted teeth on side gears and damaged ring gear) the once  Bear in mind this was a stock D35, they can be built up to be stronger but if you're going to do that it's probably worth starting with something stronger in the first place.
Cheers
Steve
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13-08-2010
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CrawlerStar
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Join Date: May 2006
Location: Brisbane Queensland
Age: 70
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i had 31,s for years with stock gearing, and at 380,000k,s i swapped it out only cause it sounded like a growly old dog, i found running in full time 4wd just guzzled more fuel
and dropped the performance
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13-08-2010
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Time to tinker
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Join Date: Jul 2002
Location: www.wooders.com.au
Posts: 10,682 What Jeep do I drive?: CJ
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Quote:
Originally Posted by spottynatty
Thanks for the responses guys.
Yeah I'd just heard so many bad stories about the Dana35s thought it might be good just to take a bit of strain off the rear axle.
Also quickly, is it true you can't go above a 31" tyre with the Dana35?
Cheers
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Guess my thoughts on the Dana35 - http://billhughes.com/dana35c/
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