general jeep info

I came across the following in my searches for info on a tcase and I figured it might be useful for someone. Not sure how complete or accurate this is, but it came of a jeepspeed page where they talked about what jeep equipment was available.

84 - Base, Wagoneer, Pioneer, Chief
85 - Base, Wagoneer, Pioneer, Chief, Laredo
86 - Base, Wagoneer, Pioneer, Chief, Laredo
87 - Base, Wagoneer, Pioneer, Chief, Laredo, Limited
88 - Base, Wagoneer, Pioneer, Chief, Laredo, Limited, Sport
89 - Base, Wagoneer, Pioneer, Chief, Laredo, Limited, Sport
90 - Base, Wagoneer, Pioneer, Chief, Laredo, Limited, Sport
91 - Base, Briarwood, Chief, Laredo, Limited, Sport
92 - Base, Briarwood, Chief, Laredo, Limited, Sport
93 - Base, Sport, Country
94 - SE, Sport, Country
95 - SE, Sport, Country
96 - SE, Sport, Country, Classic
97 - SE, Sport, Country
98 - SE, Sport, Classic, Limited
99 - SE, Sport, Classic, Limited
00 - SE, Sport, Classic, Limited, Freedom
01 - Sport, Limited, 60th Anniversary Edition


What Engines were offered?
2.5L I4 carbureted - 105 hp @ 5000 rpm, 132 ft lb torque @ 2800 rpm - used in 84-85 models
2.5L I4 TBI (fuel injected) - 117 hp @ 5000 rpm, 135 ft lb @ 3500 rpm - used in 86 and updated in 87-90 to 121hp
2.5L I4 MPI (multi-port injection) - 130 hp @ 5250 rpm, 139 ft lb @ 3250 rpm - used in 91-00
GM 2.8L V6 - 115 hp @ 4800 rpm, 145 ft lb @ 2400 rpm - used in 84-86
Renault 2.1L 4cyl. Turbo Diesel - 85 hp @ 3750 rpm, 132 ft lb @ 2750 rpm - used in 85-87
Italian VM 2.5L Turbo Diesel - 140 hp, 236 ft lb torque - used in overseas XJ's
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 91-95 and updated in 96-01 to 225 ft lb torque @ 3000 rpm (00-01 models use a distributorless ignition system)


What manual transmission were available?
AX4 - 4 speed manual - manufactured by Aisin - used 84-86 with 2.5L I4 and 2.8L V6 engines
T4 & T5 - 4 & 5 speed manual - manufactured by Borg Warner - used 84-86 with 2.5L I4 and 2.8L V6 engines
BA10/5 - 5 speed manual - manufactured by Peugot - 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
NV3550 - 5 speed manual - manufactured by New Venture - used in 00-01 in SE models with 4.0L I6 engines


What manual transmission is best?
Early XJ models had the Peugeot BA10/5 transmission. In 1987 the AX-15 became available. In 19xx the AX-15 came with an external slave cylinder. The Peugeot has a 21 spline output shaft vs a 23 spline in the AX-15. The A15 ratios are (1st to 5th) 3.83 2.33 1.44, 1.0, and .790
What automatic transmissions were available?
Torqueflight 904 - 3 speed automatic - used 84-86 with 2.8L V6 and 2.5L I4 engines
30RH - 3 speed automatic - used with 2.5L I4 engine 94?-00
AW4 - 4 speed automatic, electronically controlled - manufactured by Aisin - used from 87-01 (87-91 models include a Power/Comfort button that adjusts the shift points)


What transfer cases were available?
The transfer cases used are all chain driven with aluminum housings. NP stands for "New Process" which is the brand, if you will. The newer ones are NV instead which stands for "New Venture". It is the same transfer case just a different name.

NP207 - "Command-Trac" part-time only - 2.61:1 ratio low range - used 84-87
NP231 - "Command-Trac" part-time only - 2.72:1 ratio low range - shift pattern 2H - 4H - N - 4L - used 87-01
NP228/NP229 - "Selec-Trac" - 4Hi(full-time) - N - 4Lo (part-time) - used 84-87
NP242 - "Selec-Trac" part-time OR full-time - 2.72:1 ratio low range - shift pattern 2wd - 4part-time - 4full-time - N - 4LO - used 87-01


What are the dimensions of the XJ?
Note: Small differences may occur depending on optional equipment or trim level
wheelbase = 101.4"
overall length = 165.3" - 168.8"
overall width = 67.9" - 70.5"
track = 58"
height = 64"
height with roof rack = 66.8"
ground clearance (from differentials) = 7.3" - 8.3"
approach angle = 37.6* - 38*
departure angle = 31* - 32.1*
breakover angle = 21* - 21.9*
curb weight 2wd = 2,891 lbs - 2,993 lbs
curb weight 4wd = 3,057 lbs - 3,386 lbs
cargo capacity = 71.0 cu ft.


What kind of driveshaft is used?
Front Driveshaft - On 84-87 XJ's (NP207 t-case) the front shaft is a "GKN" style shaft. On 87-01 XJ's (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 84-95 models, the yoke slides in and out of the transfer case and is lubricated by the ATF fluid internally. On 96-01 due to a design change, the slip yoke is external (does not slide in and out of the transfer case). This slip yoke is covered with a rubber boot.


What front axles were used?
Dana 30 high pinion - reverse cut - 27 spline, 1.16" diameter shafts, 7.13" ring gear - used 84-99 (some axles through 91 are vacuum disconnect, 92+ are non-disconnect, 89-95 with ABS have 5-297x u-joints, all 95+ have 5-297x u-joints, all others have 5-260x u-joints)

Dana 30 low pinion - standard cut - 27 spline, 1.16" diameter shafts, 7.13" ring gear, 5-297x u-joints - used 00-01


What rear axles were used?
(Note on Dana 35 axles sometimes referred to as Dana 35C - The "C" does not stand for c-clip. It stands for "custom" meaning it came from Dana unfinished.)
(Note on 8.25 axles - none of these axles were used on XJ's with ABS brakes. If you have ABS, you have the Dana 35. Without ABS you could have either axle. 8.25 axles are c-clip)

Dana 35 non c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62" axle tube - used 84-89
Dana 35 c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62" axle tube - used 90-01
Chrysler 8.25 - 27 spline, 1.17" diameter shafts, 8.25" ring gear, 3" axle tube - used 91-96
Chrysler 8.25 - 29 spline, 1.21" diameter shafts, 8.25" ring gear, 3" axle tube - used 97-01
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) XJ's equipped with towing package.


What gearing was available?
3.07 - used with 4.0L engine / manual transmission
3.31 - only available on older (pre87?) 2 door XJ's with "Fuel Economy" package
3.55 - used with 4.0L engine / automatic transmission
3.73 - found in some XJ's with the towing package
4.10 - used with 2.5L engine usually, and older XJ's with the "Off-Highway Vehicle" package.


What cooling system was used?
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 XJ's


Were airbags used?
Drivers side airbag (mechanical) was added in 95.
Passenger side airbag was added in 97. Airbags changed from mechanical to electronic in this year also.


How many XJ's were built?

84 - 93,326
85 - 120,328
86 - 107,225
87 - 139,295
88 - 187,136
89 - 207,216
90 - 151,230
91 - 151,578
92 - 137,826
93 - 144,961
94 - 123,391
95 - 120,234
96 - 286,463
97 - 258,958
98 - 182,845
99 - 186,116
00 - 165,590
01 - 120,454

Kejtar said:

I came across the following in my searches for info on a tcase and I figured it might be useful for someone. Not sure how complete or accurate this is, but it came of a jeepspeed page where they talked about what jeep equipment was available.

What manual transmission is best?
Early XJ models had the Peugeot BA10/5 transmission. In 1987 the AX-15 became available. In 19xx the AX-15 came with an external slave cylinder. The Peugeot has a 21 spline output shaft vs a 23 spline in the AX-15. The A15 ratios are (1st to 5th) 3.83 2.33 1.44, 1.0, and .790
What automatic transmissions were available?
Torqueflight 904 - 3 speed automatic - used 84-86 with 2.8L V6 and 2.5L I4 engines
30RH - 3 speed automatic - used with 2.5L I4 engine 94?-00
AW4 - 4 speed automatic, electronically controlled - manufactured by Aisin - used from 87-01 (87-91 models include a Power/Comfort button that adjusts the shift points)

Click to expand...

Not off to an auspicious start here. The Peugeot BA10/5 was first introduced in 1987, not discontinued in 1987. The AX-15 was introduced mid-year in the 1989 model run.

are all AX-15's 23 spline, or just the ones that came behind HOs?
I'm looking for a new one to replace my failinf one, and if they're all 23 spline that would make live easy.

I have a MPI 4.0 in my 88 MJ. Does that make it an HO engine?

No. MPI means "Multi-Port Injection" - which typically comes back to one injector per hole. "Single-Port Injection" would be little more than throttle body injection - where there is a single injector (or bank) for the whole engine.

MPI doesn't care if it's sequential fire, bank-fire, or batch-fire - just so that there's one injector per hole.

The AMC242 has always been MPI/MPFI/PFI setup - the difference between RENIX and HO lies in control electronics. The RENIX (1987-1990) featured control electronics made by Bendix/King under contract to Renault (from which "renix" is derived) and these were replaced by ChryCo SBEC (Eingle Board Engine Controller) in 1991. The RENIX is readily identified by the divorced coil/control module and the presence of the EGR valve bolted to the intake manifold - which was deleted in 1991 with the addition of the SBEC.

So, the three generations of control electronics are:

1987-1990 - RENIX - Bendix/King under contract to Renault. Featured EGR valve, and some "non-standard" parts (like HEGO sensor.) Automatic versions also featured a "spilt" Throttle Postition Sensor (TPS,) where part of the TPS returned a signal to the ECU and the other parts to the TCU. Many sensors were also "GM Standard" - making it easier to secure a field replacement.

1991-1995 - HO/OBD-D - ChryCo SBEC and PFI setup. Standardised electronics, using ChryCo controller. OBD-I Compliant, used several standard (ChryCo) parts.) Deleted EGR vavle, added MIL/CEL and the ability to "store/throw" codes.

1996-2001 - HO/OBD-II - ChryCy SBEC/MPFI setup. OBD-II compliant, and more standard parts. Crossover for parts is currently in the works.

5-90

Some errors for the 1990 models line: there was no Chief model in the XJ series.
Also, the power ratings for the Renix (non-HO) engine are wrong. The 1990 4.0 I6 engine is rated at 177 bhp at 4500 rpm and 224 lb-ft of torque at 2500 rpm. I really dislike the tendency of some authors to assume the peak torques is at high rpm like the early HO engines. One of the best things about Renix engines is the low speed grunt. Comparing my 1990 4.0 auto to my 2001 4.0 auto, the 1990 will climb a hill comfortably in 4th where my 2001 has to downshift to 3rd to hild the same speed (same hill- my daily drive to work). Now if I had that Renix engine in the 2001 body with the 1990 sound insulation.....would be great!

4xBob said:

Some errors for the 1990 models line: there was no Chief model in the XJ series.
Also, the power ratings for the Renix (non-HO) engine are wrong. The 1990 4.0 I6 engine is rated at 177 bhp at 4500 rpm and 224 lb-ft of torque at 2500 rpm. I really dislike the tendency of some authors to assume the peak torques is at high rpm like the early HO engines. One of the best things about Renix engines is the low speed grunt. Comparing my 1990 4.0 auto to my 2001 4.0 auto, the 1990 will climb a hill comfortably in 4th where my 2001 has to downshift to 3rd to hild the same speed (same hill- my daily drive to work). Now if I had that Renix engine in the 2001 body with the 1990 sound insulation.....would be great!

Click to expand...

And the 4.0L didn't put out 177 hp in 1987. I think it was rated 173 horses when first introduced. They made some minor tweaks between 1987 and 1988 and boosted it up to 177 hp.