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Old 07-29-2012, 12:41 AM   #1
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Have 4.56s and 33s? How do you like it?

Getting ready to regear my 97 TJ 4.0/auto. Dana 30/8.8 axles. I plan on going with 33s. How does everyone like 4.56s and 33s on the highway without OD? Searched but seemed like everyone had OD or 5 SPD's.

Thanks
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Old 07-29-2012, 02:56 AM   #2
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If your auto is the 3spd you need to gear significantly higher tk regain power and this may be too large of a pinion for the d30 so you may need to swap to a d44

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Old 07-29-2012, 09:48 AM   #3
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I just went on a 2600 mile trip with D44/D30 with 4:56 gears in a '99 with 4.0 and 3sp auto. It was great in the mountains while in 4 low. The drive out had me wishing I would have gone with 4:10. 65mph was about as fast as I ever went and that is at close to 3200rpm. A 12 hour drive at 3200rpm seems like abuse, but the Jeep never had any issues and performed very well. As I take on more challenging trails, I will probably love the 4:56 more, but I had a stock Jeep with us on the trails so we didnt get too aggressive with our trail selection. Plenty of power with the 4:56. When my buddy was struggling on the highway with his transmission constantly downshifting, I was just cruising along. I did only get around 12mph on the way out running 65. I slowed to 60 for the drive home and got around 14.
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Old 07-29-2012, 06:42 PM   #4
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Quote:
Originally Posted by 74f350 View Post
Getting ready to regear my 97 TJ 4.0/auto. Dana 30/8.8 axles. I plan on going with 33s. How does everyone like 4.56s and 33s on the highway without OD? Searched but seemed like everyone had OD or 5 SPD's.

Thanks
JR
4.56 would be too low of a ratio for 33" tires and your 3-speed automatic, go with 4.10. 4.56 is only appropriate for 33" tires when you have a manual transmission. Only go with 4.56 if you plan on 35" tires in your near-term future.
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Old 07-29-2012, 07:22 PM   #5
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Thanks Guys! Appreciate the help. 33s is my limit until March when shes paid off! Looks like 4.10s are what I need!
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Old 07-30-2012, 12:20 AM   #6
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How is the 4spd auto v.s. 3spd auto v.s. the 5 spd? I have the 5 spd and am wondering how the auto compares..maybe I'll swap someday of its worth it.

Autos are more maint. Though -_-
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Old 07-30-2012, 12:37 AM   #7
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yea im in for more info on this. i have a 5sp and plan to upgrade the rear to 8.8. im gonna run 33's and debating 4:56 or 4:10
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Old 08-29-2012, 07:05 PM   #8
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4.56's is the way to go flyboy367.... I run a 2004 X 4.0 5 speed on 33's and 4.56's is perfect for all around use.... if I were to stay off the freeways ( which I don't ) I would go 4.88's for the offroad advantage of lower gears.

I pull around 2500rpms at 65mph on the freeway and maintain that on some pretty good grades in North Reno.

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