'04 TJ 6cyl, Auto with limited slip/Posi rear 3.73, 3 inch lift with GY DuraTrax 33's on 15's.
When I start off from a dead stop on pavement, after the its warmed up, never cold (driven more than 5 miles) the transaxle makes a (what seems like) a grinding noise. ( GUR - GUR- GUR) This only occurs when turning sharp 45 to 90 degree turn (left or right) from a stop about 3 of 4 times. Never going straight. Goes away right away after turn completed. Its louder if I go faster and barely noticeable if very light on gas.
Definitely coming from rear. Can feel it in seat and hear it.
Are the two axles fighting each other at this lower speed? Does not make any noise from straight stop/go. Only does this on pavement. Not off road. Any thoughts? Should I be concerned I am going to loose/grenade the rear?
I will be upgrading to Dana 44 front and rear soon with 4.10 or 4.56 ratio and OX lockers. This symptom has been since I acquired this TJ last fall. No history from FO.
I dunno, I'd start by pulling the diff cover and look for signs of damage to the gears inside. And it's not a transaxle, it's just an axle. Transaxles have a transmission integrated into them, like my old VW beetle did.
Pulled the cover off and cleaned out old gear lube in April. No signs of wear on pinion or ring. No metal or more than normal pasty goo in bottom. Replaced fluid with proper limited slip lube. No leaks and still making the noises. Only when turning from stop. Wrong terminology on axle housing and ring and pinion, woops.
If you're sure its from the rear itself (not driveshafts, steering hardware, front axle, whatever) then I'd move the axle swap plan up from "soon" to "now". Deeper inspection is going to start costing money that you don't want to spend.
If you are in 2HI then the axles won't fight one another as there is no connection. I have felt the LS action in Limited Slip diffs on various vehicles and heard them go clunk as they work, but not what you have mentioned.
Sure to love the problem.
With the automatic 0.69OD... pick the 4.56 not the 4.10.
I have the 4.10 with the 6speed and it is just right with the 0.84OD
LOL! It's cool man! I have a full time GMC that is also "4-Lock" or "4-Open" that operates the same (and has the same options in low range.. It's an NP207 if memory serves me). "4-Open" mode is the best thing I've ever driven on snow, including my TJ... It's made me think many times of putting a full time case in my "real" winter 4x4 with lockout hubs to get 2wd.
4.88 is the correct ratio for 33's when you have the 42RLE transmission. That transmission has an extra-high .69 Overdrive ratio so you need a lower axle ratio than usual to get the RPMs where they should be for that size tire. 4.56 wouldn't be quite enough gear for that combination. I have the same issue with my 35's... 4.88 isn't enough gear for them due to my 42RLE.
4.88 vs 4.56 depends on your use. 3rd gear is direct in the 42RLE. On the Interstate I'd prefer the 4.45. You need to analyze the speed/rpm to determine what is right for you. Go here and figure out what works for you.... And look at the rpm in 3rd more than 4th. OD will make the miles go by quietly on the freeway and yet 3rd is such a big drop you will have loads of power when you need it.
Only you can balance off roading vs commuting vs......
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