Have now re-geared the TJ!

I had 4.10 gearing with 33" tires for a few years and I hated the combination, the rpms were low enough that I was always downshifting to get up even minor grades. I'm a strong believer in the 4.56/33" tire combination for a Jeep with a 5-speed manual tranny. :)

Jerry

Hi Jerry,

Your recommendation weighed heavy in my decision. It just seems that 3K at

JimG

Well, it's not just me that likes the 4.56/33" tire combination, that is for sure.

Jerry

I am running 4.56 gears with my TJ and 33"s - I can now pass in 5th! I like the power. Do not start getting caught up in these details. You did it and do not look back. If you had gone with 4.10 you would be saying something else. Also this fits in with the golden rule go big go once. Regearing is very expensive and you only want to do it once

Hi Jim,

If you had steel wheels, Dana 44s front & rear, skid plates, rock bumpers, winch, hi-lift, tools, chains, and drove with the top down, you'd probably find a few hills where your 4.10s would have you lugging in 5th at highway speed. If such weight gain is in your future, you probably won't regret your gear choice.

When I lifted my daily driver XJ for 33s, I went 4.10 and it works well for me. It's a bit more aerodynamic than a TJ, so that helps. With a moderate load, the 4.0L easily holds 70-75 at 23-2400 rpm in fifth on any hill just feathering the gas. I've since installed rear Dana 44 and

- I can tick along at 2300 when the grades are moderate and simply drop back to 4th when I actually need to run at 3000 rpm.

Steve

JimG wrote:

You are probably right.. better to go more than not enough!

JimG

Hi Jerry,

I have no regrets, RPM's just a little high at highway speeds.

JimG

I have the same rpms with my present 4.88 gears and 35" tires, I have grown to love the slightly higher rpms that compensate well for everything. :)

Jerry

WOW! no one said "Real Jeeps" don't go on the highway...LOL

Jeff

According to the calculator at Randy's, you should be turning a little less than 2800 RPM at 75 MPH - speedo is probably off too since the regear Tookie - Denham Springs, LA

Hi Tookie,

Speedo is definitely off! My data is based on my GPS readings, speedo is off by 20 MPH at 70-75 MPH. Ordered new speedo gear today to fix that!

JimG

I have 4.10s in my 81 CJ7, went from 2.73 to 4.10, dana 300 tranfer and AX15 5 speed tranny, perfect with my 33s

AX15 in front of a D300, interesting. Why that, and not a more stout tranny?

I wanted a 5 speed, hydrolic clutch, something that bolted up to my 258 but would also bolt up to 4.0L if I decide to go that way, and the cost/avalibility. I live in a town with an auto wrecker that has about 50 cars, it is 2 ferries to get to city with wreckers, so knowing an AX15 would fit, and there are lots in city wreckers yards, and that an AX15, 97 or newer should be in prety good shape.

Funny I don't hear of a lot of YJs/TJs with broken AX15s, I know, there not real jeeps so it doesn't count.