4bangerjp.com
General Forums => The Mess Hall => Topic started by: RT on June 23, 2010, 03:29:10 PM
-
Hey, so I have a 2000 jeep wrangler tj MPFI 2.5 with about an inch of body lift and 4.26 gears, and I was looking to move up from the dinky 225's, the tires drive great but I have to row through the first 3 gears accelerating and honestly...my poor jeep looks like a little twinkle toes with the lift and 225's. However, I've heard that 4 cylinders dog out whenever you upgrade the tires even modestly and I was wondering how monumentally screwed I would b with 31x10.5 R15 AT's.
-
30s with 4.10 and later with 4.56 both felt fine (different but both acceptable) for me so yours will most likely run great with 4.26 and 31s.
-
sweet, I just wanted to make sure I'll still have power and maybe save a little gas...I mean I'm reving around 3500 rpm at 70-75 mph :fitz:
-
what axles are you running to have these weird gear ratios?
-
I'm pretty sure there 35c's, shit the person who had it b4 my have really gutted it, but I got my gear ratio's calculated and it's either 4.26's or maybe 4.56's (taking into account if my speedo's bo-yah! up)...I mean check it yourself, at 40mph I'm at 2000 rpm in 4th gear
-
what axles are you running to have these weird gear ratios?
I was wondering the same thing.
Pretty sure he has the D30/D35 like the rest of them came. Pretty sure it has 4.10's not 4.26
If your gonna spend money and regear just go straight to 4.88's it's as low as you can go and will handle the 31 inch tire just fine.
-
but the math doesn't add up for the 4.10's, if I had 4.10's I would be going faster than I am
-
heres a link to a gear calculator http://www.grimmjeeper.com/gears.html this is where I got my numbers
-
What tire diameter did you use for the calculation? If you over estimated, this may be what is throwing you off.
-
225/75 R15's, or 28.29 inches tall
sry guys, I could just be a stupid noob but I just had to check
-
Check the axles for a small metal tag. Should have a bunch of numbers on it with the last set saying 4.10 or 4.56.
-
For the tire size, what matters is the radius to the bottom of the tire. The weight of the Jeep will make is less than 1/2 the unloaded diameter. Probably 13.5 radius.
-
ok, sorry to waste everybodies time, the tag says 4.11 but it's crossed out with a teal permanent marker
-
but back to my origional question, how bo-yah! would I be with 4.11's and 31 rugged trails :confused:
-
Are you a comedian or is it Jeffy's profanity filter? Maybe Jeffy's the comedian? :ghey:
Sounds like you're not accounting for speedo error due to larger tires when trying to calculate your gear ratio. I've never heard of 4.26 gears, they generally jump from 4.11 to 4.56, but for an oddball d44 ratio of 4.30 in some vehicles.
-
Are you a comedian or is it Jeffy's profanity filter? Maybe Jeffy's the comedian? :ghey:
Sounds like you're not accounting for speedo error due to larger tires when trying to calculate your gear ratio. I've never heard of 4.26 gears, they generally jump from 4.11 to 4.56, but for an oddball d44 ratio of 4.30 in some vehicles.
Looks like Jeffy changed the cuss filter :roflol:
4.27's are avail for LP D44's
RT if you are not real happy with the way your Jeep performs now,then a larger tire is going to make it worse. Regearing is about the only way to fix it.
-
lol um...that was the prof filter...sadly enough I'm pretty sure I won't be bounty hunter with 31's
-
Ok so now we know who the comedian is :twofingers:
-
Looks like Jeffy changed the cuss filter :roflol:
4.27's are avail for LP D44's
RT if you are not real happy with the way your Jeep performs now,then a larger tire is going to make it worse. Regearing is about the only way to fix it.
ok coolio, thanks guys, I'm happy with it it's just that I'd like to bring down the rpms of the the engine a little.
-
ok coolio, thanks guys, I'm happy with it it's just that I'd like to bring down the rpms of the the engine a little.
hmm, everyone else is going the other way (with the 2.5L). The mpg goes down and you're basically out of 5th gear once you get your tires over 31 if you keep the stock gears
-
If you want to bring down the RPM's then going with bigger tires without a regear is the thing to do. There is a fairly wide range of gearing that will feel acceptable (maybe not ideal but still acceptable), it's not something that has to be set exactly.
-
ok, thanks guys! I'm gonna go ahead and go with some 30" BFG's and some black steelies
-
ok, thanks guys! I'm gonna go ahead and go with some 30" BFG's and some black steelies
No intention to make your desition any tougher, but I run 31" witn stock 4.10 gears and it's fine. I didn't loose 5th and I can get to 75 mph on the highway.
Long story short...... with 31" I'm bounty hunter all over the place :twofingers:
-
No intention to make your desition any tougher, but I run 31" witn stock 4.10 gears and it's fine. I didn't loose 5th and I can get to 75 mph on the highway.
Long story short...... with 31" I'm bounty hunter all over the place :twofingers:
what tires do you run? Because I love the way that 31's look on tj's but I'm scared of adding the weight, rolling resistance, and added radius.
-
what tires do you run? Because I love the way that 31's look on tj's but I'm scared of adding the weight, rolling resistance, and added radius.
I'm running some pretty lame 31x10.5 Dunlop's Grandtrek AT2 with 1.5" wheel spacers:
(http://lh3.ggpht.com/_7rvBbKdSzBM/TBQtMF7GNsI/AAAAAAAAAMc/tllGFb4536s/s800/IMG_3753.JPG)
I would not recommend this tires, they are not meant for heavy offroad use, the second they are worn out I will go to some BFG MT Km2. I have never had an issue with the spacers, I tighten them every month.
-
I'm running some pretty lame 31x10.5 Dunlop's Grandtrek AT2 with 1.5" wheel spacers:
(http://lh3.ggpht.com/_7rvBbKdSzBM/TBQtMF7GNsI/AAAAAAAAAMc/tllGFb4536s/s800/IMG_3753.JPG)
I would not recommend this tires, they are not meant for heavy offroad use, the second they are worn out I will go to some BFG MT Km2. I have never had an issue with the spacers, I tighten them every month.
ok, cool they look great , I was looking for a tire that doesn't make a lot of noise, is pretty light and I could take to moab for some moderate crawling or duning in albuquerque. I'm really liking the GeneralTire AT Grabber2...does anyone know anything about this tire?
-
If I was going to run a AT tire I would run the BFG KO. It's pretty good at everything but mud. Not noisey, but the AT's are made to be that way.
-
General grabber is not a bad offroad tire at all, don't know about tire noise ask Chris Franklin on this board, he runs them and does pretty good offroad with them
-
General grabber is not a bad offroad tire at all, don't know about tire noise ask Chris Franklin on this board, he runs them and does pretty good offroad with them
I got some 31" Firestone Destination MTs and drove them over the entire Rubicon Trail last year without any problem. They are pretty quiet on the highway as the reviews I read last year mentioned.
Little more noise than the 29" ATs I had previously, but I still sometimes forget that I'm using an MT tire. Good in the wet and brake pretty well also.
As far as downsides, 33" is the largest size Firestone apparently makes in the Destinations. I want to step up to 35s, I'll have to look for something else.
But, if you want MTs and want to keep things pretty quiet on-road, these have worked for me. I'd check around and see what else is out there though.
-
:roflol:
i should lower my jeep 2 inches, put 22inch rims on it with 45 profile tires and take that offroad!!!
:roflol: :roflol:
-
hmm, everyone else is going the other way (with the 2.5L). The mpg goes down and you're basically out of 5th gear once you get your tires over 31 if you keep the stock gears
To a certain point you'll get better mileage. When I was running 32x11.5R15 BFG AT and stock gears, I could pull off 25-37MPG but that was on the highways at 50-55mph, using some hyper-milling tricks and using 5th.
I'm not sure if I'd bother swapping gears for 31's. If the OP is on 4.56's then I wouldn't bother. He's either on 4.11's or 4.56's. 4.11's and 31's, I had no problems getting around. It felt downright peppy compared to my 32's. 4.56's were a real improvement though. I don't think they even make 4.29:1's for the D35c.
-
To a certain point you'll get better mileage. When I was running 32x11.5R15 BFG AT and stock gears, I could pull off 25-37MPG but that was on the highways at 50-55mph, using some hyper-milling tricks and using 5th.
I'm not sure if I'd bother swapping gears for 31's. If the OP is on 4.56's then I wouldn't bother. He's either on 4.11's or 4.56's. 4.11's and 31's, I had no problems getting around. It felt downright peppy compared to my 32's. 4.56's were a real improvement though. I don't think they even make 4.29:1's for the D35c.
I'm getting great mileage, it's just that...I row through the gears like mad, I mean i'm in fourth gear at 35 :P
-
I'm getting great mileage, it's just that...I row through the gears like mad, I mean i'm in fourth gear at 35 :P
Yup, it's tough when you don't have the extra torque. Lots of up and downshifts to stay in the powerband. You have tiny little tires though so that's why you get decent mileage still. Add several hundred pounds and you'll struggle too. :lol:
-
years ago my friend asked me what size wheels did i have on my jeep( being we didnt drive yet) and i answered seriously "Twenty Two's....."
:lol: :lol: :lol: