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Old 02-18-2014, 08:05 AM   #1
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Plz help

hi guys..i have a question..i have a sahara 2000 TJ...and i wana upgrade my tires to 33'..but lots of people tell me not to because i have an automatic transmission and my gear will break...any advice???

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Old 02-18-2014, 08:58 AM   #2
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You have poorly chosen your "lots of people". Plenty of people have done lifts with automatics. To fit 33" tires to need at least 3" of lift. There are many different ways to get there. The first question we are going to want to know is "What are your intentions for this lift. Off-roading or looks? Budget?

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Old 02-18-2014, 09:01 AM   #3
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Do people really do tires and a lift just for Looks? Seems silly.
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Old 02-18-2014, 09:17 AM   #4
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Originally Posted by samerdiab View Post
hi guys..i have a question..i have a sahara 2000 TJ...and i wana upgrade my tires to 33'..but lots of people tell me not to because i have an automatic transmission and my gear will break...any advice???
Autos can handle 33 foot tires no problem. Just upgrade your lift
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Old 02-18-2014, 10:27 AM   #5
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33s and auto will do fine. I assume you have the 4.0. It will handle ok, but will suffer with poor mileage per gallon and performance. It may not necessarily break your gears but if you want closer to stock performance for acceleration, passing, and mileage, you will need to regear.
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Old 02-18-2014, 10:31 AM   #6
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Autos can handle 33 foot tires no problem. Just upgrade your lift
I don't think there is a Jeep around that could handle a "33 foot tire"!
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Old 02-18-2014, 10:51 AM   #7
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You will want to re-gear if you have the auto with 3.07 gears. I have 32x11.5 on my auto with 3.07 gears I wouldn't want any more rubber on there. Its not bad with the 32 but it is border line and I live in a flat area with little to no hills and no step upgrades.
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Old 02-18-2014, 12:32 PM   #8
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You have poorly chosen your "lots of people". Plenty of people have done lifts with automatics. To fit 33" tires to need at least 3" of lift. There are many different ways to get there. The first question we are going to want to know is "What are your intentions for this lift. Off-roading or looks? Budget?
Hmmm ... I have a friend who ran 33x12.5's on her 2001 TJ with just 2" of spacers inbetween her springs. She had no other lift and had no issue at full lock
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You will want to re-gear if you have the auto with 3.07 gears. I have 32x11.5 on my auto with 3.07 gears I wouldn't want any more rubber on there. Its not bad with the 32 but it is border line and I live in a flat area with little to no hills and no step upgrades.
Where do you notice a loss of power? I have the 4.0l 3 speed auto with 3.07's in the rear and have been looking to get 33x12.5 down the road. The same person I mentioned above never mentioned having an issue with loss of power, but I never checked what gear she had. I'm thinking of going with a wider tire for the beach and having a better contact patch.
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Old 02-18-2014, 05:40 PM   #9
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Hmmm ... I have a friend who ran 33x12.5's on her 2001 TJ with just 2" of spacers inbetween her springs. She had no other lift and had no issue at full lock

Where do you notice a loss of power? I have the 4.0l 3 speed auto with 3.07's in the rear and have been looking to get 33x12.5 down the road. The same person I mentioned above never mentioned having an issue with loss of power, but I never checked what gear she had. I'm thinking of going with a wider tire for the beach and having a better contact patch.

33's are best with 2-2.5" coil spring lift along with a 1.25" body lift. Any less will rub the flares under flex.
As for gear ratios, 4.10 gears tend to be ideal for 33's vs. 3.07s. You will struggle with some power loss with an auto and 3.07 gears.
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Old 02-19-2014, 01:45 AM   #10
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So probably will change my diff to dana44 in the rear..because I dont wana lose the power when upgrading...thx alot
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Old 02-19-2014, 05:38 AM   #11
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So probably will change my diff to dana44 in the rear..because I dont wana lose the power when upgrading...thx alot
You don't have to swap rear axles, just the gears in your current axle.(replacing the 3.07 to 4.10 gears) You can try driving it with the ugraded tires to see if it's tolerable to you before you decide to regear.
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Old 02-20-2014, 02:02 AM   #12
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aha !! okay !! i will..thx for ur advice
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Old 02-20-2014, 05:15 AM   #13
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Do people really do tires and a lift just for Looks? Seems silly.
Of course they do. How many lifted vehicles (including jeeps) do you see on the road. Do you think they are all running off road (much if any)?
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Old 02-20-2014, 06:01 AM   #14
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Autos can handle 33 foot tires no problem. Just upgrade your lift
33. FOOT tires would be some big tires 😂
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Old 02-20-2014, 11:24 AM   #15
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Our 99 has a 3" suspension lift, and 33s powered by a 4.0/auto does fine on the flat roads. As for going up hill on a highway ,it does dogg down some.JMO
....but Im just an ol fart cruzin::
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Old 02-20-2014, 01:02 PM   #16
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Hmmm ... I have a friend who ran 33x12.5's on her 2001 TJ with just 2" of spacers inbetween her springs. She had no other lift and had no issue at full lock

Where do you notice a loss of power? I have the 4.0l 3 speed auto with 3.07's in the rear and have been looking to get 33x12.5 down the road. The same person I mentioned above never mentioned having an issue with loss of power, but I never checked what gear she had. I'm thinking of going with a wider tire for the beach and having a better contact patch.
I mostly beach run myself I like the 32x11.5 she a little slow getting to 60, 12.5 sec. and a friend of mine has 33 but our tires look the same size so i dont know how bad 33x12.5 would be I do know it wont be better LOL
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Old 02-20-2014, 01:33 PM   #17
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If this helps any... I have a 4.0 with 3.07 and 33x12.5x15 with a 2.5" BB. I live in Houston so it's pretty flat and use it as a daily driver. The only hills we have are the freeway bridges. I will say that she doesn't seem to lose too much power but I've been fine, or lazy, for now. She wasn't made for speed so I'm in no hurry to get to places but I can still punch it and it seems to go. The previous owner put on a full exhaust... I don't know if it helps or not. My mpg also is low... Probably around 13-15 mpg city. I've never really flexed it so much that I rubbed the fenders or flares. I'll take it through mud and the sand dunes on the beach and took it to Mexico even, into these mountains. If you want to slap them on for now, I've been fine, maybe you will be too. Then you can upgrade when you are ready.

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