Is the 2.5l worth buying?

[Simple Man]

I'm looking for a clean MJ to build up and I've come across a four cylinder. My question is wether it's worth building or should I wait for a 4.0l?

 

If the milage is that much better and it wheels okay, I could probably put up with low freeway power. It's listed as having a 4 speed trans.

 

Any comments would be appreciated.

 

Thanks,

[mj_lover]

the milage difference isn't that much less, about the same on the highway. i like 'em lots of room under the hood, but i would think a 5 speed is a must. another factor is your location, how many clean mj's are there around you?

[Eagle]

The 4-cylinder is a good engine, but if it has a 4-speed that means it's a 2WD, and it means it has 3.54 gears. It also means an early year MJ -- not a problem if it's an 87 or newer, but if it's an 86 the engine compartment is subtly different, which makes converting to a 4.0L engine later more difficult. (Not impossible, just adds another layer of modifications you would be happier avoiding.)

[Pete M]

car-part.com and my brochures list the 4 speed manual as available in 4wd through 91, but if that's accurate, they are a rare breed for sure.

 

Careful on tire size if you plan to ever go bigger, as the 2.5Ls are more sensitive than the more powerful 4.0L.

Jeep on!

--Pete

[bigd44889]

my 88 is a 2.5 whith a stock 4 speed manual

[bigd44889]

by the way my mj is a 2.5l 4 speed 4X4 stock to the bone

but it is getting bored out .040 over

and looking for a header for it

and changing intake to let it breeeeth lol

[matrix37495]

The 4-cylinder is a good engine, but if it has a 4-speed that means it's a 2WD, and it means it has 3.54 gears.

on JeepForum, someone said the the 4.10 gears are used with the 2.5L

Here under gearing.

so which is it? 3.54 or 4.10

[Eagle]

The 4-cylinder is a good engine, but if it has a 4-speed that means it's a 2WD, and it means it has 3.54 gears.

on JeepForum, someone said the the 4.10 gears are used with the 2.5L

Here under gearing.

so which is it? 3.54 or 4.10

4.10s were used with the 2.5L and 5-speed manual tranny. The 4-speeds got 3.54s. I own one and I have double-verified the ratio.

 

That's a good summery of specifications, but I've reviewed it in the past and there are numerous errors.

[matrix37495]

awesome! i have the 4spd but planned on swaping ing a 5spd. i guess ill be gettin killer fuel milage now! some told me the the 4 and 5 spds use different clutches. is this true? will i have to get new clutch with the 5spd or can i use my existing clutch(which is also newish)

[mjeff87]

same clutch between the AX4 and AX5. They are the same transmission (except the 4 doesn't have a 5th gear)

Jeff

[matrix37495]

awesome! thanks a bunch! not i i could just afford that dang $265 for the ax5 :D