Comanche Stock Specs
Well, I just now finished up making the stock specs, hope everything is in order.
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.
For those curious to the 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, all body parts forward of the firewall are swappable from specific year-model Cherokee's (86 models should use 84-86 parts; 87+ should use 87-92 parts), and all mechanical/electronic parts forward of the firewall ARE identical.
The body comes only in standard cab model with a rear double-top hatch tailgate. Comes in longbed and shortbed models with various trim levels and design cues, such as two-tone and stripe kits. 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. Gauge cluster is removed by 4 screws. Gauge cluster during 86' have mechanical-powered gauges. On 87-90 gauges, The speedometer uses a cable, but all gauges 91-92 use a computer cable.
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])
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) ---
4.0L I6 EFI "Power Tech" - 177 hp @ 4750 rpm, 220 ft lb @ 4000 rpm - used 87-90
4.0L I6 MPI "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in 91-92
2.1L 4 cylinder Turbo Diesel - 85 hp, 132 ft lb torque.
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
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-Warner - used from 87-92 (87-92 models include a Power/Comfort button that adjusts the shift points)
The transfer cases used are all chain driven with aluminum housings. NP stands for "New Process" which is the brand, if you will.
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
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.
> 4wd: 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.
> 2wd: Two-piece inner and outer design which is much different that the 4wd rear shaft. It includes a rubber isolator between the inner and outer tubes and is roughly twice the diameter of the 4wd rear shaft.
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)
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.
All rear axles are made of a spring under axle design.
3.07 - used with 4.0L engine / manual transmission
3.31 - used with 2.5L Fuel Miser option
3.55 - used with 4.0L engine / automatic transmission
4.10 - used with 2.5L engine usually
4.56 - rare but can be found on some older (~ 89 ~) models with 2.5L engine and auto transmission
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 MJs.
No airbags during Comanche timeline.
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
MJ (4x4 only)
1991 5,188 (TOTAL)
1992 3,142 (TOTAL)
A little info on dimensions:
The OTHER notes section!!!
You missed the Metric Ton paskage which used the D44 in the rear. You also forgot to mention that the 90-92 had a height snsing proportioning valve that was used to change the bias of the brakes if the bed had a load in it. You also forgot the long and short bed. As for the trim levels youy forgot the eliminator, or the Sport Truck. You also forgot to mention the fact that there was 2 different size gas tanks, and that the rear axle is a spring ubder axle design. Besides fron all those things good post. :thumbsup:
I don't know a lot about stock specs for the MJ, and mine was purchased from someone who didn't know a lot either. However my MJ seems to conflict with the stock specs you listed. I'm trying to find out more about mine to begin with, but this is what I know so far. It seems to be a base Comanche, however is it possible it has a towing kit? How would I check (theres a tow hitch, but that doesn't tell me much.)
It's an '88, 2.5 liter I4, with a 5 speed manual transmission. (this seems to conflict with your list.)
No other special features as far as I can tell. It's not a long box, and it's the original dark maroon color.
Can anyone tell me anything else about it knowing that information, or where to look on the jeep? I had found an online VIN decoder for the Comanche, but not having much luck finding it again (could swear I bookmarked it...)
I found my build sheet on my 90 MJ behind the drivers side door panel, and one Under the seat, not that I was looking for them. I was pulling out the bench seat to replace them with buckets, and The door panel was coming off so I could replace the window regulator.
Alright, changes made. And krodeMJ, I can't seem to find any info about a towing "kit". I'll keep looking...anybody know about a towing "kit"?
Alright, any problems or information I need to fix or add?
Sorry, I'm not sure if it's called a towing kit/package, but I've seen the reference around some places. It may refer to what I've also seen called the 'metric ton package'. Not sure of what it's supposed to be called, or include, but I know one of the features of that option is different gearing in the rear differential.
Well I wouldn't want to be reposting info on that but.......but the towing package IS the power-comfort switch, but I'm still not sure about the metric-ton package. It might be different, I'll study up on it. But cj7xjmj, what exactly do you mean by metric-ton package? That switch on ur dash?
The metric ton package was an option for the MJ. It included the D44 rear, and a few other things, I am not sure of all the items cause they are extremely rare. The power comfort switch came on almost all the early model AW4 trannies.
The towing package included a transmision cooler and 3.73 gears.
The towing package pretty well consisted of the power switch on the dash. When it is switched on it flows more fluid and thus helps it lockup better. I think a read the hitch and trailer light relay were actually optional.
I haven't confirmed it, but I think I have the metric ton package. I've got a longbed with a D44 rear and the power button, but no wiring in the back for a trailer.
PS. On the specs I think the HO engine came out in '91, and the gas tank is always located in front of the rear wheel.
Alright, I've studied up on all of this and listen to ya'll
Towing Package: Known as the Power/Comfort swtich, it changes the timing between shift points, as the spec sheet shows.
I'm still having trouble finding the metric ton package info, but it's still listed in the spec sheets.
As I'm just starting on this spec sheet, anything else need to be fixed or added? I'm still waiting for dimensions and production numbers.
All info from Illustrated Buyer's Guide JEEP by Jim Allen
MJ (4x4 only)
1991 5,188 (TOTAL)
1992 3,142 (TOTAL)
All the early AW4 transmisions came with the power comfort switch. This is not the towing package option. That was standard with the aw4.
Side note: 86 Comanche-Cherokee's did not come or have the option of the towing package/power-comfort switch.
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