The 2.5liter/150cu engine was used in the following vehicles:

• 1984-1986 Jeep CJ-7
• 1983.5-1984 AMC Eagle
• 1984-2000 Jeep Cherokee (XJ)
• 1986-1992 Jeep Comanche (MJ)
• 1987-2002 Jeep Wrangler (YJ/TJ)
• 1988-1989 Eagle Premier
• 1996-2002 Dodge Dakota

Note the TBI was made by Renix and used mid '86 to 08/'90

Here is a list of trucks that share the same rear shocks.

92-99 2wd Suburban

73-86 2wd Suburban

85-04 Safari/Astro 2wd van

90-04 Safari/Astro AWD van

70-95 fullsize chev/gmc van

80-96 ford f100/f150 2wd pu

82-94 dodge ram 50 4wd pu

83-89 dodge raider w/leafs

65-77 ford f250 4wd

69-91 2wd blazer/jimmy

69-87 2wd chev/gmc pu

85-95 toyota motorhome w/dually

87-95 nissan pathfinder 2wd/4wd

83-06 ford ranger 2wd

83-90 ford broncoII 4wd

86-96 dodge dakota 2wd

shock specs:

extended:22.58"

Collapsed:13.78"

Travel: 8.85"

type:loop to loop

instrument cluster from 87-90
If you're having issues with the idiot lights, now's a great time to upgrade to the full cluster. You just need a cluster from any 87-90 MJ-comanche/XJ-cherokee (87-90 are direct swap, 86 and eariler will also work if you adapt the speedo cable parts behind the cluster) and then swap out the temp and oil pressure switches for sending units. Be very careful when removing the oil pressure parts, as they have been know to snap off on occasion. Apply lubricant liberally leading up to the swap.

Relay Wiring Diagram

A relay is typically used to control a component that draws high amperage. The relay allows full power to the component without needing a switch that can carry the amps. The switch only controls the relay. The relay then provides a direct connection to the battery. It should be noted that either the power(86) or ground(85) in the relay control circuit can be switched. In the case of a horn,  the horn button would be used to switch the ground lead(85) and power(86) would be provided directly from the fuse box.

This is a typical wiring diagram for a standard relay installed for
headlights, horn, fuel pump, electric fan, etc. If the relay has a
5th terminal, it is not used.

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Comanche Stock Specs

Common Design

All MJs were built as a full unibody design with the body and frame rails tied/welded together as one piece and cannot be removed, however, the rear is a fully boxed frame with the bed bolted to it, making the bed removable. All MJs have solid axles front and rear. The suspension consists of coils for the front and leaf springs for the rear. All MJs came with disc brakes in the front and drums in the rear.

Also, all MJ's through all years are equipped with a height sensing proportioning valve that is used to change the bias of the brakes if the bed had a load in it.

Differences in Cherokee's and Comanche's:

The taillight lenses are different from a Cherokee's, the wheel flares are the same (as a 2dr Cherokee), the front doors off of 4-door XJ's (84-92 at least) are swappable, hoods are swappable from 84-92 models Cherokee's (Cherokee's above 92 used spring-loaded hinges), and all mechanical/electronic parts forward of the firewall are identical.

Body

The body comes only in standard cab model with a rear double-top hatch tailgate. Comes in longbed or shortbeds two-tone versions. Long bed versions come with a larger gas tank than the short bed and is located front of the axle. Short bed version was not avaiable in 1986.

Interior: door panels are removable as stock. Bench seats and bucket seats DO NOT have the same mounting brackets as XJ seats, but are fairly easy to make fit. The gauge cluster is removed by 4 screws. Gauge cluster's during 1986' have mechanical-powered gauges. On 87-90 gauges, The speedometer uses a cable, but all gauges 91-92 use a computer cable.

Wheelbase:

short bed 2wd=113.1 4wd=112.9 (18 gal tank)
long bed 2wd=119.6 4wd=119.4 (16 gal [longbed, opt shortbed] 23.5 gal [opt longbed; standard from 1989])

Engines

2.5L I4 TBI (fuel injected) - 117 hp @ 5000 rpm, 135 ftlb @ 3500 rpm - used in 86 and updated in 87-90 to 121hp (2.5L became MPI in 91 and was rated for 130hp @ 5250 and 149 ftlb @ 3250) --- Fuel Sipper package was available, lowering the HP
to 100hp and included a 4 speed manual trans, no tail gate, undercoating, and 3.31 axle gears. The 4x4 Fuel Sipper got the same treatment as well as no spare tire or brackets. GM 2.8L V6 - 115 hp @ 4800 rpm, 145 ft lb @ 2400 rpm - used only in 1986.

Italian VM 2.8L Turbo Diesel - 140 hp, 236 ft lb torque - used in overseas MJs

2.1L 4 cylinder Turbo Diesel - 85 hp, 132 ft lb torque.

4.0L Gas Gulper Option I6 EFI "Power Tech" - 177 hp @ 4750 rpm, 220 ft lb @ 4000 rpm - used 87-90
4.0L Gas Gulper Option I6 MPI "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in 91-92

Transmissions

Manual Transmissions
AX4 - 4 speed manual - manufactured by Aisin - used 86-92 with 2.5L I4 and 2.8L V6 engines and 2.8L turbo-diesels
T4 & T5 - 4 & 5 speed manual - manufactured by Borg Warner - used only in 86 with 2.5L I4 and 2.8L V6 engines
BA10/5 - 5 speed manual - manufactured by Peugeot - used only up to 89
AX5 - 5 speed manual - manufactured by Aisin - used with 2.8L V6 and 87+ with 2.5L I4
AX15 - 5 speed manual - manufactured by Aisin - used with 4.0L I6 engines

Automatic Transmissions
Torqueflight 904 - 3 speed automatic - used only in 86 with 2.8L V6 and 2.5L I4 engines and 2.8L turbo-diesels
AW4 - 4 speed automatic, electronically controlled - manufactured by Aisin - used from 87-92 (87-92 models include a Power/Comfort button that adjusts the shift points, also known as a towing package; all transmissions came with the towing package and came with a transmission cooler; 88+ models used Power/Comfort switch for off-roading)

The "Metric Tonne" or "Big Ton" or "payload package" was designed for hauling, was only available on longbeds, and consisted of an AMC-20 rear axle in 86, Dana 44 rear axle in 87-92, heavier duty springs front and rear, tougher shocks, the larger tires, fullsize spare and 15x7 wheels. In the AMC-20, the only gear ratio was 4.10, Dana 44s got stuck with the standard ratio available with the specified drivetrain combo (3.08 for 4.0l/manual, 3.54 for 4.0l/autos, and 4.09 for 2.5l/manuals).

Transfer Cases


The transfer cases used are all chain driven with aluminum housings. NP stands for "New Process".
NP207 - "Command-Trac" part-time only - 2.61:1 ratio low range - used 86
NP231 - "Command-Trac" part-time only - 2.72:1 ratio low range - shift pattern 2H - 4H - N - 4L - used 87-92
NP228 - "Select-Trac" part-time OR full-time - 2.6:1 ratio low range - used 86
NP242 - "Selec-Trac" part-time OR full-time - 2.72:1 ratio low range - shift pattern 2wd - 4part-time - 4full-time - N - 4LO - used 87-92

Driveshafts

Front Driveshaft - On 86-87 MJs (NP207 t-case) the front shaft is a "GKN" style shaft. On 87-92 MJs (NP231/242 t-case) the front is a "double cardan" two-piece driveshaft with a CV joint at the transfer case end.

Rear Driveshaft - The rear is a one-piece shaft with standard u-joints at both ends. The slip yoke is located on the output shaft of the transfer case. On 86-92 models, the yoke slides in and out of the transfer case and is lubricated by the ATF fluid internally.

This information might override what's written on the rear-driveshaft, but has no method of being added in as 'stock'

Actually, there were 2 different styles of rear shaft offered, though I have yet to determine a logical pattern behind which MJ got which. The other one was a 2-piece design, but not the usual 2-piece you're thinking of where one side slips on the other. The MJ 2-piece had a large outer tube on the transmission side and a smaller tube on the axle side. They are fused together with a thick rubber isolator designed to reduce vibrations.

Axles

Front Axles

Dana 30 high pinion - reverse cut - 27 spline, 1.16" diameter shafts, 7.13" ring gear - used 86-92 (all axles are vacuum disconnect, and have 5-260x u-joints)

Rear Axles

AMC-20 - 29 Spline, one piece axle shafts, 8.875" Ring Gear; Metric Tonne axle in 86.
Dana 35 non c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62" axle tube - used 86-89
Dana 35 c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62"axle tube - used 89-92
Dana 44 non c-clip - 30 spline, 1.31" diameter shafts, 8.5" ring gear, 2.75" axle tube - used 87-89 on some(not all) MJs equipped with towing package.
(note for D44's: All MJ's equipped with the stock D44 come with the Metric Ton Package)

All rear axles are made of a spring under axle design.

Gearing

3.07 - used with 4.0L Gas Gulper engine / manual transmission (18MPG)
3.31 - used with 2.5L Fuel Sipper option (22MPG)
3.55 - used with 4.0L Gas Gulper engine / automatic transmission (16MPG)
4.10 - used with 2.5L engine usually (20MPG)
4.56 - rare but can be found on some older (~ 89 ~) models with 2.5L engine and auto transmission (20MPG)

NOTE:
Cooling Systems

Open style - any normal cooling system used today. Opposite of closed style described below.

Closed style - has no radiator cap and utilizes a pressure bottle. This style cooling system was used in 87-90 Known for trouble overheating in both XJ's and MJ's. Preferred fix is electric fans mounted to switch in cab that shuts off when key is turned to off position, so you can't accidently leave it running and kill your battery. At minimum make sure your clutch fan works good and temporarily drill a screw thru it to lock it up until you can get around to putting in electric fan(s)

Airbags

No airbags during Comanche timeline.

Trim Levels

86 - Custom, X, XLS
87 - Base, Pioneer, Chief, Laredo, SporTruck
88 - Base, Pioneer, Chief, Laredo, Eliminator, SporTruck
89 - Base, Pioneer, Chief, Laredo, Eliminator, SporTruck
90 - Base, Pioneer, Chief, Laredo, Eliminator, SporTruck
91 - Base, Laredo, Eliminator, SporTruck
92 - Base, Laredo, Eliminator, SporTruck

Production Numbers

MJ (4x4 only)

SWB/LWB
1986 23,251/xxxxx
1987 6,199/6,685
1988 6,895/9,167
1989 5,354/5,021
1990 3,283/2,129
1991 5,188 (TOTAL)
1992 3,142 (TOTAL)

Other Jeep Comanche's in British Columbia (cardomain links)

this is my 88 Jeep Comanche. I bought it in 2004 for 900 bucks. It didnt look anything like it does now. I had to change the tires and wheels cuz the stock ones just wouldnt do for me. I still got the little bit of rust around the left rear fender to fix and the drivers door was in good shape until a deer ran into it on the logging road. My tonneau cover i got from work, they were gonna throw it away so I took it and got it for free. It had the center console in it where it went right from the dash to the back of the seats, but i changed it to the bench seat version and put one of those body pillows in it just cuz it matches the seat covers very well.

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Heres my 1989 Jeep Comanche, got it about 2 years ago for 1000$, put a 1999 xj 4.0l engine it it and recently dropped an NSG370 (6-speed) out of a 2005 Rubicon in it. Its got a 6.5" Rubicon Express lift in it. Cherokee Limited leather interior that i put in. Rubicon wheels, 3" flowmaster exhaust that sounds pretty mean. and i have a Cherokee D44 that i am getting ready to put in. The back bumper is off of a 2003 Sonoma.

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This is gona be the pics of the interior and the engine. I have no engine pics yet but by next week i will.

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this is my 1990 jeep cherokee 4x4 2 door with a straight six. it has a 4.5" lift in the front and 4.5" blocks in the back with 33" mud tires. i have put in a new stereo system so far and cleaned it up, i just put in some neons and installed a new short ram intake and got me some new subs(4 12" audiobahn's), plus i got like 4 new 4x4 stickers for the windows(adds a buttload of hp and torque, lol) it looks cool though. i should get some pics up this week sometime. my new valve cover and gasket, also i have more work to do cuz its leaking underneath on the main seal, plus shes got some body damage. next payday i need to get: drivers side door and fender, passenger side door and fender, front and rear bumper(probably the off-road kind), fender flares which are below, and i need to pull out the dent in the right side quarter panel and thats all for this month, ill have pics up soon.

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Jeep Comanche 1988-This is my Comanche owned it for about 7 years now, Looking to fully customize and build up for the bush. Should be lots of fun.

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hello everyone, this is my 1988 jeep comanche, it has a couple minour mods and alot of my money in it, here are a few of them -rebuilt engine. -comp cams camshaft. -bored .030 over. -port and polished head and intake manifold off af a 2001 model. -high output head. -header style manifold. -custom dual exhaust. -custom intake. -high output injectors. -thats all i can think of right now but there was more to the engine that that. this is the truck in newfoundland -new rad and electric fan optional from the factory. -i put a ax-15 tranny in it because i was hauling the camper across Canada, right across from B.C. to Newfoundland. -also had to change the t-case to a different year of the same model to bolt to the tranny. -new springs and soa to clear 31's and give room for the camper to sqaush the truck. -3 inch front coils and 2 inch spacers. -homemade camper bars front and rear. -heavy duty rear bumper. -front bush guard. NOW THE INTERIOR -changed to bucket seats with a cherokee centre console -took the mouldy rotten carpet out and put in a factory replacement rubber floor mat in. -put in a kameleon cd player to have at least some tunes for the trip even though the speakers suck. -installed a rpm guage to help with the break in of the cam. -the only trouble on out 7,000km trip to newfoundland was in suit st marie, ontario when the pinion seals went in the rear diff and it puked the oil out, so we speedy sleeved it at mr transmission, (dont go to mr transmission), slapped the new bearings in and carried on our way, while we were in newfoundland the clutch master cylinder went, but that was it, a year later we went home, and we were in owens sound when the bearing cap on the passenger side front axle shaft flew out, we pulled over, i took it out in 1/2 hour, had to have the whole shaft replaced and then we were gone thats it in over 14,000 km of straight driving. I also used it as my work truck when i got home. i averaged 12 mpg with the camper on and fully loaded. but i was still able to keep it in 5th gear while on the highway for alot of the time

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My 1975 Jeep J20: AMC 360 V8 Edelbrock Performer Intake Edelbrock 600 CFM Carb New pusrods, lifters 3'' Rancho Suspension Lift New Rancho Shocks Here are some offroad pics of the truck before the restore bagan, and with the new meats. The New meats, the ones the truck came with were LT 225/75R16 BFG crappy Dan editions, the new ones are LT315/75R16 Dunlop Mud Rovers, work awesome.

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my jeep This is my 88 Jeep Comanche. When I first bought it, it had really ugly rims and tires, but it did rain the day I got the new tires so it made it fun with the old bald ones. I bought the rims from American Racing. If I were you, dont get aluminum, get polished aluminum, it looks a hell of a lot better. I got the fog lights from Canadian Tire for about 40 bucks and the reverse lights were 10 bucks a piece. They make it alot nicer to back up in the dark.

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this is my comanche, shes nothin pretty now but i am soon hoping to do a paint job and some upgrades

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Jeep Comanche 1986 / w/2.8liter

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After almost 16 years of ownership it is time to let the child go free. I have owned this truck since new and thru the years have kept it looking like it just rolled off the showroom floor. Unfortunately now I need something bigger so this 89 Comanche is up for sale. It is 6cyl, 4WD, 5SP standard, 200,000 Km and it is as immaculate as a truck of this vintage can be. No rust, never had any, was re-painted a few years ago when the clearcoat faded. I have receipts dating back 6 years. The same garage in my home town maintained this truck religiously every 5000 Km. The only time the truck sees new engine oil is then, not a drop needed in between changes. Everything works. Inside is burgundy seating, bench seat. Not a crack in the dash or rip in the fabric. If you are interested in this truck email me at: jdm@islandnet.com. I will provide more details to serious Jeep enthusiasts interested in owning a rare vehicle and know the value of one.
This is my 1989 Comanche! Its got the 4Liter 5spd, buckets, RWD. The corner was smashed when i got it. But as of now the passenger fender is replaced and painted black, the header panel is replaced and black also, plus i put on all refurbished chrome piece's it the place of those ugly black ones! the driver fender is almost ready to go back on. I'll put finished pics on soon!!
-Front and rear Dana 44 axles from an International Scout II. -Detroit Lockers front and rear with 4.09 gears. -4340 chromoly axles and super u-joints in the front. -Superior Alloy axles in the rear. -Front Suspension is coil 5-link with 9 inches of lift. -Rear Suspension is spring-over with custom leafs, 9 inches of lift. -Dual Transfer cases (116 to 1 crawl ratio). -1st: custom based on NP231 planetaries. -2nd: custom based on a combination of NP231, NP241 parts. -Stroker 4.5L HO multi-port fuel injection . -5-speed manual AX-15 from 1990 Jeep YJ. -Beadlocks with super swamper TSL/SX 36" X 12.5". -On-board air, tanks under the box, couplers in both bumpers. -Warn 9000lb winch. -Box bobbed 10"(now a flatdeck). -Heavy-duty GM cross-over steering . -Built-in rock sliders under doors. -Custom front and rear bumpers. -Rear winch mounts under box with winch fairlead incorporated into rear bumper. -Bosh 8" ralley lights -MP3 deck with 12" sub -RTI 963