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RING & PINION FOR LIBERTY 3.7 '02


 
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plazanas
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Joined: 24 Aug 2004
Location: Greece

PostPosted: Thu Jan 12, 2006 8:42 am    Post subject: RING & PINION FOR LIBERTY 3.7 '02 Reply with quote

Hi guys. Ever since I bought my KJ 3.7 Auto (we call it Cherokee in Europe) it felt as if the drivetrain is far too overgeared, and the vehicle is not as fast as it could be.
Recently I got an advice from a dealer to change the gears to 4.11 or even lower.
Anyone has any experience on this issue?
Thanks,
Panos, Greece
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1fox2go
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Joined: 01 Dec 2004
Location: Fishersville, Virginia

PostPosted: Thu Jan 12, 2006 8:44 am    Post subject: Reply with quote

I take it by overgeard and not going as fast as you think it should your saying that when you go fast the engine is taching high rpms?

if thats the case you dont want 4.11 gears something like 3.07 or 3.55 would be better for your application
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96 Cherokee 7.5 inch TnT long arm Locked F/R, D44 rear, 4.56s, 35x12.50 Muds/36x12.50 TSLs
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Code3TJ
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Joined: 01 Jan 2004
Location: Uzbekistan

PostPosted: Thu Jan 12, 2006 12:13 pm    Post subject: Reply with quote

Or does it not accelerate as fast as you'd like?
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Stevo02TJ
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Joined: 02 Jan 2005
Location: Waynesboro and Harrisonburg, Virginia

PostPosted: Thu Jan 12, 2006 12:53 pm    Post subject: Reply with quote

If it does not accelerate fast enough, I would suggest going up numerically in number (i.e.- from 3.73 to 4.10 or 4.11). It's basically saying what 1fox2go said, but HE is interpretting it as if you're engine RPMs are too high at Interstate speeds for your liking.

Mine is geared extremely high for my liking (3.07 with 33s shock rofl ). So I do have the experience of bad gearing, but I havn't had the time or money to switch over to 4.11 or 4.56 gears.


HTH,
Stevo
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plazanas
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Joined: 24 Aug 2004
Location: Greece

PostPosted: Mon Jan 16, 2006 10:21 am    Post subject: KJ GEARING Reply with quote

Well, what I meant is the contrary, car travells at very low rpm but this is not an issue. The problem is when I drive on hills, say with 2nd gear, and when I need to accelerate, well either it takes toooo long, or I need to kick down to 1st even at 25mph. It is a general feeling I have that with lower gearing the car would behave much better. You also have to remember that the drive conditions in Europe are much diferent than those in US. I was wondering if switching to 4.11 gears would possibly cause any side effect on the electronic gearbox.

Thanks anyway


1fox2go wrote:
I take it by overgeard and not going as fast as you think it should your saying that when you go fast the engine is taching high rpms?

if thats the case you dont want 4.11 gears something like 3.07 or 3.55 would be better for your application
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1fox2go
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Joined: 01 Dec 2004
Location: Fishersville, Virginia

PostPosted: Thu Jan 19, 2006 8:30 pm    Post subject: Reply with quote

changin the gears is actually changing the gears in the differentials not the transmission

if driving conditions are very different than over here then yes 4.11s would be ok if thats what you think but it will be a drastic VERY drastic change if you have say 3.07s thats why i recomended the 3.73s it wouldnt be as drastic and you would get better take off and power to climb the hills

just my opinion you know the roads over there better than i do rofl
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96 Cherokee 7.5 inch TnT long arm Locked F/R, D44 rear, 4.56s, 35x12.50 Muds/36x12.50 TSLs
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plazanas
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Joined: 24 Aug 2004
Location: Greece

PostPosted: Fri Jan 20, 2006 12:50 am    Post subject: Reply with quote

Thanks. Yes, actually my KJ is equipped with 3.73 gears and I will probably go to 4.11 as the best choice. Ok rpm will rise when crusing on motorways but I think that the improvement in off-road and everyday driving is worth it


1fox2go wrote:
changin the gears is actually changing the gears in the differentials not the transmission

if driving conditions are very different than over here then yes 4.11s would be ok if thats what you think but it will be a drastic VERY drastic change if you have say 3.07s thats why i recomended the 3.73s it wouldnt be as drastic and you would get better take off and power to climb the hills

just my opinion you know the roads over there better than i do rofl
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