haha yeah..from what ive just read my 1996 is a 23 spline..so i need to get a 93 or newer ax15 to match my tcase...of course ill actually count the splines when the time comes for the swap and find the correct transmission...im getting excited now lol

 

im telling you youll be more happy with your 4.0

 

 

go to Novak conversions

 

look for a trany and TC together then sell your old one to re coop cost
that way you will ovoid any issues

 

yeah that might b a better idea lol. thanks for all the help guys

 

Not to argue either but I wouldn't be so sure on the 5.0 gettin better gas, you gotta think a GT Stang probaly got around 20-25mpg, take that and throw it behind a jeep (whole lot heavier than any mustang) with lift & tires and you'll be down to 15mpg. I've never seen a 5.0FI F-150 get anything better than 16-18mpg, my 4.0 gets 20+ right now just depends on if I flog t, if I go easy on here I get 22-23 around town and 25 on the highway, was gettin 27mpg with the old 225-70-15's

 

My good ol 90 F-150 Made 20 MPG wether or not I was running 15 MPH or 90 MPH...Jeep makes about 25 MPG and I haven't had as many problems with my Jeep as I had with my F-150. I miss having a bed tho...

 

well according to my titles my jeep weighs as much as my mustang did..and 27+ mpgs with a 5.0 motor that i hadnt done a tune up on ever. my stock jeep gets 18 highway if im lucky (and yes i calculated it correctly)..and absolutely no *****..my 408 mustang gets 21 mpgs highway..thats why it pisses me off. if the motor had gobbs of torque id understand but its slower then anything ive ever owned and u cant make it up a damn hill lol. none of my friends touch 20mpgs either with their 4.0s...im not worried about gas mileage so much. if it gets the same then so be it

 

a lot of speculation in here...

I'll share some facts.

My 92 5.0 coupe with no options weights 3040lbs (scales at the drag strip), convertible GT's are know to weigh in excess of 3600lbs.

For those that don't know this...XJ's are light 4x4's, from the factory they are know to weigh 3050lbs. My front bumper is 80lbs, rear is 70lbs, belly up skid is 95lbs, rock rails are less than 100lbs... 3395lbs.. still lighter than a 3600lb convertible.
So, lets put the weight to bed.

My '92 Mustang repetedly returned 29mpg at 70-75mph cruise running 3.73's gears, bone stock motor.
A stock 4.0 is rare to return 23mpg, let alone 25mpg stated elsewhere.

My '92 mustang with bone stock 5.0 engine (offroad H pipe only exhast mod) made 218hp and 276tq AT THE WHEELS.
I want to see a dyno of a modified 4.0 that comes handy that, and if it does, it's getting 15mpg or less.
Kinda makes me want to dyno my stock 4.0... I'm guessing 150-160hp and 180ish tq at the wheels.

With ported stock heads, ported stock intake 65mm throttle body and full exhaust my 5.0 makes 296hp and 335tq AT THE WHEELS.
No drivable naturally aspirated 4.0 is going to come close.

The mustang club I belong to has several 5.0 stock bottom end cars with handy 300,000 miles that have lived life as daily drivers and strip toys... That is likely more punishment than a typical 4.0 will ever see, and comparable life.

I like my little 4.0... I'll rebuild it if it ever expires, but I will never confuse it with a 5.0 (302) V8 Ford.

turbobred1320,
do this swap, get back to us with how it'll burn the hides from a roll in 2nd gear, how you are getting mid 20mpg's(or better), and... ahhh don't bother with an actual dyno, 'cause most Jeeper's don't understand the difference between manufactures power claims (engine dyno, manipulated atmosphere, dyno headers and the typical carb for ultimate peak numbers) vs actual rear wheel numbers.

 

do a write up if you do it, cause if i ever swap out the 4.0 it would be for a 5.0 ford

 

actually 4.0s motors can make comparable power that mustang motor, turbo the 4.0 and put a computer in with an exhaust and throttle bot=dy and intake and youll pull 300 + horsepower with comparable torque

 

Been down the stroker path, won't do it again.

My stock 5.3L puts down 295HP without any mods. A minor tune gets me over 300.

 

So first, your calling me a liar saying no 4.0 will make 25 mpgs? Second, I know strip driving is rough on an engine...but how about mudbogging in deep mud? About as rough...wouldn't you say?

 

Hi there , that sounds great! please keep your post going when you do the swap, a freind and i have talked about this for a couple of years, we are both ford/jeep fans and thought a efi 302 would make the xj just about perfect!!