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Old 03-28-2013, 01:42 PM   #1
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32s w/ D35 3.07 How bad will it be?

I really wanted to put a 2.5 OME on with 32s, but I have a D35 3.07. I want to play in the mud and on the trails. It's a sport with 3sp auto.
How sluggish will it be? Will I really get passed by granny on my daily drives?

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Old 03-28-2013, 01:44 PM   #2
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I don't know about an auto trans, but I'm still running a D35 (3.07 gears) with a 4" lift and 33x12.50's. I can use the first 3 gears effectively. If I'm in 4th, the road better be flat, or downhill!

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Old 03-28-2013, 02:14 PM   #3
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I have 32's w/ 3.07 in a d35, but with a 5spd. Yea, you'll notice the difference on hills, have to re-adjust your driving from what you are used to. There are hills I used to drive and accelerate up in 3rd, but now have to hold second. Btw, I have a 4.0L, may be different with the auto. I'm watching for a d44 with better gears to make a swap.
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Old 03-28-2013, 02:22 PM   #4
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You'll be fine. I run that with 33s. It will get you to 65 and a little less uphill no trouble.
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Old 03-28-2013, 02:29 PM   #5
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Thanks for replies. Really have my heart set on 32s.
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Old 03-28-2013, 02:44 PM   #6
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I really wanted to put a 2.5 OME on with 32s, but I have a D35 3.07. I want to play in the mud and on the trails. It's a sport with 3sp auto.
How sluggish will it be? Will I really get passed by granny on my daily drives?
FWIW... I have an '01 Sahara with 31" KM2 tires.... 3sp auto, D35 3.07, 4.0L.
No difference in power on the trail or hwys that I've noticed. Plenty strong in the mtns here, no complaints. If anything... maybe a hair less giddy-up when launching from a dead stop.
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Old 03-28-2013, 03:10 PM   #7
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It will suck badly.
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Old 03-28-2013, 03:37 PM   #8
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It will suck badly.
Not really. The right gears with the 32rh 4.0 and 33s are 4.10s. With some lighter 32s the 3.07s aren't as terrible as they would be with a manual. Mileage isn't even bad, I get the same as others with a regeared manual.
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Old 03-28-2013, 03:38 PM   #9
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Yeah you will want to regear. I have a 99 TJ 3 speed auto with 31s and it sucks. I'm getting everything ready for a regear, lift and bigger tires all in one shot.
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Old 03-28-2013, 03:54 PM   #10
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I say get your 32's and put them on. But start planning on gears asap 4.10 would be my recommendation then you can get some 33's when your ready. I had a yj with 32x11.50 with 3.07's but it was a 5 spd. it was pretty long legged with that setup. Drove that way a while. and went 4.56 with 33's. Your auto wont be as bad as a 5 spd.
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Old 03-28-2013, 04:28 PM   #11
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Yeah you will want to regear. I have a 99 TJ 3 speed auto with 31s and it sucks. I'm getting everything ready for a regear, lift and bigger tires all in one shot.
I don't see what sucks. I can hit 80, get 15 mpg up to 18 highway, and it still works offload. It's not a sports car.
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Old 03-28-2013, 04:33 PM   #12
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Not really. The right gears with the 32rh 4.0 and 33s are 4.10s. With some lighter 32s the 3.07s aren't as terrible as they would be with a manual. Mileage isn't even bad, I get the same as others with a regeared manual.
I've got some seat time with this combo. It sucks compared to a properly geared setup. But I'm not a fan of TJ automatic transmissions anyway.
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Old 03-28-2013, 04:38 PM   #13
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It will suck badly.
I have to agree with Imped. I have 31's with the 32rh trans and 3.07s and it sucks. Sucks bad!!!!!

Of course I'm driving in hilly WV.
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Old 03-28-2013, 04:42 PM   #14
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I've got some seat time with this combo. It sucks compared to a properly geared setup. But I'm not a fan of TJ automatic transmissions anyway.
Me too... Like 3 years of seat time, 2 with 33s What don't you like about the 32rh? Maybe not the best but certainly not the worst.

Obviously everyone will have their opinion, but this combo (lighter 32s/wheels) would certainly be livable.


Op it comes down to this. You will lose power, mileage, and possibly useable top end compared to stock. If you are okay with that throw on tires. I not plan to regear.

I never regeared because I knew I would be swapping axles and adding Even bigger tires. I have been fine/happy for 2 years with 3.07s 33s, the 4.0 and 32rh.
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Old 03-28-2013, 04:51 PM   #15
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How hard is it to regear? What all is involved?
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Old 03-28-2013, 05:00 PM   #16
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How hard is it to regear? What all is involved?
It's difficult. You can learn but you better be good. You replace the ring and pinion gears in both axles. Usually people do bearings etc as well. You have to set several different specs such as backlash and check gear patterns many times.
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Old 03-28-2013, 10:58 PM   #17
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I don't see what sucks. I can hit 80, get 15 mpg up to 18 highway, and it still works offload. It's not a sports car.
I don't ever go on the highway for the simple fact that its not in my commute. My jeep just feels like a dog in town. I understand that it's not a sports car, I just feel like it could be so much better. I can't recommend anyone run like this because I know it's making the transmission work a lot harder than it needs to or is designed to and if you have ever had to rebuild a 32rh you know it's not cheap. Also it may work offload but you need to drive a regeared Jeep and you will see what I'm talking about.
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Old 03-28-2013, 11:35 PM   #18
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Its functional with 3.07s and 32s. I guess it depends on what you value more diminished power and lift/tires or stock power with no lift/tires.
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Old 03-29-2013, 08:38 AM   #19
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I talked to a local shop and the guy there said for $1200 he'd swap out the d35 for a 8.8 and I would never have to worry again. Is that a good deal? I don't want to start throwing lifts and bigger tires on my TJ if it can't handle it properly. I know I'll want to go bigger later. Should I lay the foundation and just do a swap now?
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Old 03-29-2013, 08:46 AM   #20
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I don't ever go on the highway for the simple fact that its not in my commute. My jeep just feels like a dog in town. I understand that it's not a sports car, I just feel like it could be so much better. I can't recommend anyone run like this because I know it's making the transmission work a lot harder than it needs to or is designed to and if you have ever had to rebuild a 32rh you know it's not cheap. Also it may work offload but you need to drive a regeared Jeep and you will see what I'm talking about.

You must have something wrong with your jeep then, because I'm not seeing any of those issues. I don't know how it's making the transmission work harder if anything it might be lugging the engine but mine does not. I wheel with regeared jeeps all the time and have no issue. Plenty of gear and power.

You have basically stock tires, I truly don't understand how 3.07s can be that bad for you. 3.73 is the ideal ratio for you so you are barely underpowered. You do have the 4.0? Is your wheel/tire combo particularly heavy?
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Old 03-29-2013, 08:47 AM   #21
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I talked to a local shop and the guy there said for $1200 he'd swap out the d35 for a 8.8 and I would never have to worry again. Is that a good deal? I don't want to start throwing lifts and bigger tires on my TJ if it can't handle it properly. I know I'll want to go bigger later. Should I lay the foundation and just do a swap now?
Depends what gears are in it and you would still need the front regeared. That might be a good deal depending what all he does to it.
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Old 03-29-2013, 09:46 AM   #22
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You must have something wrong with your jeep then, because I'm not seeing any of those issues. I don't know how it's making the transmission work harder if anything it might be lugging the engine but mine does not. I wheel with regeared jeeps all the time and have no issue. Plenty of gear and power.
Agree.
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Old 03-29-2013, 02:27 PM   #23
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Yes, depends on the gears in the 8.8, and does that price include regearing the front axle too?
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Old 03-29-2013, 05:44 PM   #24
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I am running 32x11.50 with 3.07s, 3 speed auto, and I'm with golden on this one , my jeep will easily do 85mph or better and is pretty quick off the start.
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Old 03-29-2013, 07:03 PM   #25
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I have a 98 with the 32rh/3.07 setup and I have no complaints. I'm running 31's.
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Old 03-29-2013, 08:14 PM   #26
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You must have something wrong with your jeep then, because I'm not seeing any of those issues. I don't know how it's making the transmission work harder if anything it might be lugging the engine but mine does not. I wheel with regeared jeeps all the time and have no issue. Plenty of gear and power.

You have basically stock tires, I truly don't understand how 3.07s can be that bad for you. 3.73 is the ideal ratio for you so you are barely underpowered. You do have the 4.0? Is your wheel/tire combo particularly heavy?
Nope nothing is wrong with my Jeep. It's got the good ole 4.0. I don't see how you think I'm barely unpowered because 3.07 is no where near suitable for a Jeep that has 31x10.50s with steel wheels. And that not even close to stock considering stock size is 205/70R15. Not trying to start a pissing contest here but the OP asked if the Jeep could handle it properly (I.e. perform like a factory Jeep with factory size wheels and tires) and a Jeep with 3.07s with 32s will not perform properly. And now he's talking about going bigger than that. I got my Jeep in stock form and it does not perform like it did with little street tires and stock rims. I've got a friend that has 33 Goodyear MTRs on his with 3.07 gears and he says that he notices a difference on the trails since putting those on from his 32s. There is a difference in performing properly and not being able to complain. Just a personal option I guess...
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Old 03-29-2013, 08:38 PM   #27
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I had 3.07 and 33 inch tires with a 5 speed. Yes I could live with it but now that I have geared to 4.56 it is a completely different vehicle. I even get to use 5th gear now...LOL
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Old 03-29-2013, 08:43 PM   #28
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I had 3.07 and 33 inch tires with a 5 speed. Yes I could live with it but now that I have geared to 4.56 it is a completely different vehicle. I even get to use 5th gear now...LOL
A fine example of working properly vs just working...
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Old 03-29-2013, 09:35 PM   #29
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First of all, no offense Kssig but you have a completely different trans.

Jeepin9910,

The correct gears for 31s are at/just below 3.73s with the combo our jeeps have.

Perhaps you have very heavy tires/wheels?

I have had 33 inch Duratracs and MTRs and no issues. Sure there may be a difference in opinions, there always will be. A lifted jeep with larger tires will never perform exactly like a stock jeep. It will handle, brake, accelerate, and perform much different no matter what. You have to address all these things. You can regear but stock performance will never be back 100%. I see very minimal difference between stock and how I run now. 3.07s are sucky as stock gears, yes. Do they perform and work? Yes. You don't even have 33s or 32s on your jeep. I understand your opinion, and that you aren't happy with the performance. Since we can't sit behind the wheel of each others jeeps, and we may have very different ideas of acceptable or normal performance, we may never agree.

What the OP actually asked is:

How bad?

How sluggish?

Will granny pass me?

It won't be that bad, it will only be sluggish on steeper uphills on the highway, and granny will only pass him if she is going faster than he is.


If he really does want to go bigger later, why would he regear now if he may have to again later?
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Old 03-29-2013, 10:07 PM   #30
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First of all, no offense Kssig but you have a completely different trans.

Jeepin9910,

The correct gears for 31s are at/just below 3.73s with the combo our jeeps have.

Perhaps you have very heavy tires/wheels?

I have had 33 inch Duratracs and MTRs and no issues. Sure there may be a difference in opinions, there always will be. A lifted jeep with larger tires will never perform exactly like a stock jeep. It will handle, brake, accelerate, and perform much different no matter what. You have to address all these things. You can regear but stock performance will never be back 100%. I see very minimal difference between stock and how I run now. 3.07s are sucky as stock gears, yes. Do they perform and work? Yes. You don't even have 33s or 32s on your jeep. I understand your opinion, and that you aren't happy with the performance. Since we can't sit behind the wheel of each others jeeps, and we may have very different ideas of acceptable or normal performance, we may never agree.

What the OP actually asked is:

How bad?

How sluggish?

Will granny pass me?

It won't be that bad, it will only be sluggish on steeper uphills on the highway, and granny will only pass him if she is going faster than he is.

If he really does want to go bigger later, why would he regear now if he may have to again later?
My tires and rims are pretty heavy and the reason I don't have 33s or even 32s is because I'm doing a lift, tires, axle shafts, lockers and gears all at once so that I don't have to drive my Jeep being sluggish. And you said it yourself 3.07 gears are sucky as stock gears so why would you make them even sucker by throwing bigger tires on for them to turn. Also I don't understand why people buy something twice or even three times when they can do it right once. I understand building in stages but part of lifting and bigger tires is regearing. The OP asked for everybody's opinion and I gave my option based on what I have experienced with my Jeep. Like you said we can't drive every Jeep and every Jeep will perform differently.

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