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Old 04-01-2012, 06:47 PM   #1
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4cyl with 33" Tires

sooooo I am looking to get another jeep after having sold mine in hopes of getting a 6cyl already lifted..that didnt happen and i ended up with a ford sport trac...

anywho..my question is...I see alot of 4cyl's running around with 4" lift and 33s...which is what i'm looking for , minus the 4cyl....how much does this bog them down and what can be done gear wise to make up for it

(not very knowledgeable in the jeep world)

thanks

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Old 04-01-2012, 06:57 PM   #2
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I have a 98 with a 4cyl and 33's. Right now i have stock gears, (4:10), and climbing hills on the highway needs a downshift and i usually run 4th gear if im moving along. They say 4:88's are the way to go with 33's and a 5 speed 4 banger. Locally im looking at around $800 parts & labor for the install. I will get it done to see if it will improve gas mileage and power in about a month. Otherwise, its fine, not as bad as an automatic with a 4 cyl.

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Old 04-01-2012, 07:00 PM   #3
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Just forget about using 5th and you'll be fine.
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Old 04-01-2012, 07:27 PM   #4
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yea 5th is almost worthless but not quite. I have a 4cyl with 31" tires and 4.56 gearing. It works great on the trails, the highway is a different story.

I personally would never buy a jeep that is already modified. Most likely it was used and abused and thats why its up for sale. Usually you can find an older guy that takes nice care of his stuff with a completely stock jeep ready to be abused by you!
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Old 04-01-2012, 07:49 PM   #5
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To be specific my 5th gear shredded on my ax5 in my yj on 33'sv(which was the same drivetrain as early tjs). And I couldn't run 5th on flat roads at 70 mph. The max I would get is about 65 unless I was drafting. 4.56 or 4.88 help a lot with a 4 cyl.
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Old 04-02-2012, 06:58 AM   #6
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I have 33's and a 2.5L. Also have 4.88's in the differentials. It does make a difference. I can run 5th gear on the highway, but still have to downshift on long or steep grades. That was a limitation with 30's and 4.10's, so it won't change with 33's and 4.88's. It's the limitation of the engine and 4.88's won't make it more powerful, but it is not a slug getting up to speed like with 33's and 4.10's.
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Old 04-03-2012, 10:10 PM   #7
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what if i have a 2.5 with the 6 speed trans. is it a good idea to look into regearing...if so what gears..i run 33" tires
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Old 04-03-2012, 10:57 PM   #8
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Then you have a rare jeep lol the 2.5s were not offered with a 6speed
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Old 04-04-2012, 06:59 AM   #9
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Quote:
Originally Posted by yellowbeast View Post
what if i have a 2.5 with the 6 speed trans. is it a good idea to look into regearing...if so what gears..i run 33" tires
If you have a 6 speed, you likely have the newer TJ's that had the 2.4L 4 cylinder engine, which most say has a bit more power than the 2.5 it replaced.

For a manual transmission, I believe 4.88 is still the gear set of choice and the lowest you can go without swapping axles.
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Old 04-04-2012, 02:07 PM   #10
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Makes me wonder

Quote:
Originally Posted by erickpl View Post
I have 33's and a 2.5L. Also have 4.88's in the differentials. It does make a difference. I can run 5th gear on the highway, but still have to downshift on long or steep grades. That was a limitation with 30's and 4.10's, so it won't change with 33's and 4.88's. It's the limitation of the engine and 4.88's won't make it more powerful, but it is not a slug getting up to speed like with 33's and 4.10's.
I have a 2.5 on 33's and now im not sure what gears are in it. Bought it lifted and i can run 5th gear and only have to shift when the hill is long or steep. It has a Jasper, with a header and airaid set up. She'll hold 65-70 in 5th on the highway and drop maybe 5-7 mph if i dont downshift on a hill. Ive never driven a stock jeep on 30's or one with 33 and 4:88's so i really dont have a point of reference
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Old 04-04-2012, 11:05 PM   #11
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Then you have a rare jeep lol the 2.5s were not offered with a 6speed



it says you also have the 6 speed not that rare eh?
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Old 04-04-2012, 11:06 PM   #12
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it says you also have the 6 speed not that rare eh?

typo its the 2.4L
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Old 04-04-2012, 11:17 PM   #13
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For the 5-speed and 2.5L engine, you want 4.88 gearing for 33" tires... the four-banger needs the slightly higher RPMs 4.88 gives to compensate for the bigger diameter and heavier 33" tires.

I have no idea what the slightly more powerful 2.4L with 6-speed would run best with but I'm thinking it might get away with 4.56 for 33" tires.

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