Do they know what they are talkin about??????

[Ramsey]

oh my.

yes 4.56s and 33s. i had 31s and 4.56s for a while and i miss it. i wont be happy with it w/35s without at least 4low. if you have an 8.25 just do 4.56s. if you have a 35 dont waste your money on it

 

[TiRod]

A side note on the financing - the 4 cyl with AW4 came with 4.56's, so if you find one in the boneyard, would the complete axles be cheaper than installing new gears front and rear? Then it becomes a u-do-it, your labor is not eating your cash flow, and you spend the money on other upgrades, like a full tank of gas . . .

 

[OT]

I've never heard of stock 4.56s in an XJ.

 

[RNMedic]

came with the 4 cyl auto a guy in Cincinnati actually had a set and counted them, If you check car-parts.com there is a listing for them, John

 

[OT]

came with the 4 cyl auto a guy in Cincinnati actually had a set and counted them, If you check car-parts.com there is a listing for them, John

Interesting....

 

[TiRod]

I noticed when I was doing my patriotic duty down south that a lot more Cherokees came with 4 cylinders and 2WD. Not quite the answer for this discussion, but it would be nice to know where certain combinations of powertrains are more commonly distributed. I also assume that some models are not prime carriers - most Laredos seem to be 4.0 with AW4 and 3.55's - so could I assume Pioneers are more likely to have 4.56's?

 

[noresttill]

most Laredos seem to be 4.0 with AW4 and 3.55's - so could I assume Pioneers are more likely to have 4.56's?

???

 

[J98cherokee]

Im running 32s with 3.55 and I think its very slugish when Im climbing stuff or even on roads in the mountains. Ive heard alot of people have done 4.56 with it and love it but what about 4.11? Its a daily driver and sees a good bit of pavement and not as many trails for now. Down the road ill go 33s so im thinkin 4.56??

 

[Yucca-Man]

Ive heard alot of people have done 4.56 with it and love it but what about 4.11? Its a daily driver and sees a good bit of pavement and not as many trails for now. Down the road ill go 33s so im thinkin 4.56??

You've already answered your own question. You're going to go to 33, so go 4.56 now. People love 4.56 with 32s, so why go with something slightly less than what the calculators recommend for 32s anyway? Calcs don't take weight into account, and you definitely need to do that.

4.56
32"
2750rpm@ 75mph

 

[MudDawg]

Sounds like those guys can't think past the little rubberbands on a wheel size tires. On my heep, 4.88's and 33 TSL's work out to the same EFFECTIVE ratio as the stock 3.73 gears and 215/75 tires.

 

[MyJeepXJ]

4.56's should be fine for 33's as long as you have an overdrive.

Zactly...

 

[Jeff in VA]

came with the 4 cyl auto a guy in Cincinnati actually had a set and counted them, If you check car-parts.com there is a listing for them, John

Yes, they do exist, but are pretty rare. Came behind 87-89 XJ/MJ's with 2.5L and AW4. Here's the one I snagged out of my local 'yard a couple weeks ago. I left the rear behind (D35)
Jeff

 

[tchase]

I noticed when I was doing my patriotic duty down south that a lot more Cherokees came with 4 cylinders and 2WD. Not quite the answer for this discussion, but it would be nice to know where certain combinations of powertrains are more commonly distributed. I also assume that some models are not prime carriers - most Laredos seem to be 4.0 with AW4 and 3.55's - so could I assume Pioneers are more likely to have 4.56's?

While there is some truth to that it's not all cut and dry. I got my 4.10's out of an '87 Pioneer (2.5/AX5), but my '89 Pioneer has 3.07's (4.0/BA10 originally now 3spd t-flite, bad combo with the 3.07's). For low gears you can rule out '87-up Limiteds and waggy's as they were all AW4/3.55 as far as I know. I've also never seen a laredo with anything less than a 4.0 so they'd be 3.55 or 3.07 depending on tranny. The Pioneer is the likely source but it's not a gaurantee, even then it's only the rare 2.5/AW4 combo that got 4.56's, the three speed auto's couldn't run such a low gear due to the lack of overdrive.

 

[cloudswimmer]

I am regearing my jeep next weekend, and i have always thought that with 33 inch tires, you should get 4.56's. However, when i called the shop they said that 4.56 would make my rpm's something like 4000 on the highway, and that i should get 4.10's. Please let me know what you guys think i should get??

Also, i saw a thread once with a link on how to find out how many teeth you need on your speedo gear to make it accurate...anyone know it?

Have 4:56 wish I'd gotten 4:88

 

[basalt51]

4.88s, 33s, 70@2800 RPM = Perfect. (with an AT)

If its a commuter 4.56s would probably be better.

 

[a_tittman]

Assume that you transmission has a overdrive ratio of .84 to 1 here are some charts I made for different gear ratio, speeds, and engine rpm. Hope it helps.

Axle Ratio
4.11

Vehile Speed (mph) Engine Speed (rpm)
50 1787
55 1965
60 2144
65 2323
70 2501
75 2680
80 2859

Axle Ratio
4.27

Vehile Speed Engine Speed
50 1856
55 2042
60 2227
65 2413
70 2599
75 2784
80 2970

Axle Ratio
4.56

Vehile Speed Engine Speed
50 1982
55 2180
60 2379
65 2577
70 2775
75 2973
80 3172

Adam