MRV 5500 1974 JEEP CJ Specs
User Manual: MRV 5500
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1974 JEEP CJ-5 304 V-8
From This……
To This………
NADA Guides Valuation:
Date:
Feb 12, 1012
Oct 1, 2012
Original MSRP:
$ 3,574.00
$ 3,574.00
Low Retail:
$ 5,300.00
$ 6,360.00
Average Retail (a 20-footer):
$ 11,700.00
$ 14,760.00
High Retail:
$ 16,300.00
$ 19,560.00
Purchase Price at Feb 12, 2012: $ 5,600.00
Serial #: J4F835TH37056
Vin Numbers for 1971 to 1974
Character
1st
J = Jeep American Motors
Make
2nd
1 = 1971
2 = 1972
3 = 1973
4 = 1974
Year
Vin Numbers for 1971 to 1974
3rd
A = Toledo - Auto - LHD
B = CKD - Auto - LHD
F = Toledo - 3 Speed - LHD
G = Toledo - 3 Speed RHD
J = CKD - 3 Speed - LHD
K = CKD - 3 Speed RHD
M = Toledo - 4 Speed - LHD
N = Toledo - 4 Speed - RHD
O = CKD - 4 Speed - LHD
P = CKD - 4 speed RHD
Plant - Transmission - Drive
4th & 5th
63 = CJ5 81" Wheelbase CKD
64 = CJ6 101" Wheelbase CKD
83 = Universal, CJ-5, 84"
Wheelbase, 4 Wheel Drive
84 = CJ6 104" Wheelbase 4 x 2
Series
6th
5 = Open Body
Body Style
7th
A = CJ5 - 3750 lbs
E = CJ5 - 4150 lbs H.D.
R = CJ6 - 4750 lbs (max)
S = CJ5 - 4500 lbs (max)
T = 3750# GVW, model 83
Body Type - GVW
8th
A = 258 Six Regular
B = 258 Six L/C
E = 232 Six Regular
F = 232 Six L/C
H = 304 V8 Regular
R = 134 four Regular
T = 134 Four L/C
Engine
9th - 13th
###### (37056)
SSN
(Sequential Serial Number)
Mileage:
At July 17, 2007 when previous owner transferred title:
47700 miles
Estimated by previous owner before new speedometer installed:
1000 miles
At August 7, 2007 as recorded by emission testing station:
055 miles
When Purchased – Feb 12, 2012:
1470 miles
Total (+- 10%):
50170 miles
Jeep Info: http://www.offroaders.com/tech/jeep/index.html
Maintenance:
Date
Mileage
Description
Part # / Type / Spec
Comments
Mar 5, 2012
Engine Oil Change
10W-30
Mar 5, 2012
Replaced Air Cleaner
Fram CA136
Mar 5, 2012
Replaced PCV valve
Old one appeared to be working OK.
Mar 11, 2012
Replaced Spark Plugs
Autolite AP65
#8 slightly fouled
Mar 11, 2012
Tune-up (timing, idle mixture)
Nov 6, 2012
Engine Oil Change
10W-30
Nov 12, 2012
Set idle mixture @ 15.0 – 15.2
Used air/fuel meter
Nov 12, 2012
Checked Timing - OK
Dec 10, 2012
Changed out Transmission and
Transfer Case Gear Oil
Sta-Lube API, GL-4
Napa Part #
SL24239
Old oil very dirty, small amount of
sludge around magnetic drain plug.
Suspect old oil may have been GL-
5.
Dec 13, 2012
Replace Rear Differential cover
plate and gasket. Refilled
Lucas 80W-90
heavy duty gear oil
Non synthetic
Engine: AMC 304 CID V8. 150 HP @ 4200 rpm (Torque 245 @ 2500 rpm)
The AMC 304 uses a cast iron block and heads with over head valves and hydraulic lifters. The AMC 304
was introduced in Jeep vehicles in 1971 in J-series pickups and Wagoneers and in 1972 in the CJ
vehicles. Early 304s performed well, so well that frame changes were made to the CJs in '73 to prevent
cracks.
Meeting legal requirements for smog controls on the 304 severely hurt performance of the engine. In
1971, the engine put out 210 HP @ 4400 rpm (Torque 300 @ 2600 rpm). By 1980-81, this had been
reduced to 125 HP @ 3200 rpm (Torque 220 @ 2400 rpm).
Normal Oil Pressure; 50 psi
Transmission: Borg-Warner T-15 - 3 speed
The Borg-Warner T-15 is a 3 speed transmission with a cast iron case with a casting number of
T15 or 1307. The casting numbers on the T-15 are on the passenger side near the top back. It
has a 1 1/8" 10 spline input shaft. The T-15 has a 1 3/8" 6 spline output shaft. It has a reputation
as the strongest of the 3 speeds.
Gear
Ratio
1st:
3.00
2nd:
1.83
3rd:
1.0
Reverse:
3.00
Transmission rebuilt – Jan 2014 by “Herm the
Overdrive Guy”
Transfer Case: Dana 20
The Dana 20 is a heavy duty gear driven transfer case
that takes a 26 tooth input gear. The case and tail
housing are cast iron. The output for the front driveshaft
on the Dana 20 is on the passenger side and the rear
output is centered. Low range is 2.03 and high is 1.00.
The poor low range of this transfer case makes it less
desirable.
The Dana 20 can be identified by the center rear output, cast iron tail housing, and deep oil pan. The
Dana 18 has an offset rear output, other than that, it looks a lot like a Dana 20. The Dana 300 uses a
round bolt pattern with 23 spline input, an aluminum tail housing (often painted or covered with grime),
and a nearly flat oil pan. Both the Dana 18 and Dana 20 use the "Texas" bolt pattern with 5 bolts holding
on the transfer case.
Usage: The Dana 20 was used in CJs from 1972 until 1979. It was introduced in larger Jeep trucks in
the 1963, but it wasn't used in any Jeep trucks after 1979.
Can be flat towed with transfer case in neutral and transmission in gear (1st).
Twin stick conversion on Dana 20 Transfer Case.
Rebuilt with Tera-Low (3.15 to 1) Gear Set – Jan 2014 by “Herm the Overdrive Guy”
Front Axle: Dana 30 – 5350863 41 11 - Ratio 3.73 (3.1 with 33” tires)
Rear Axle: Dana 44 – Ratio 3.73 (3.1 with 33” tires)
Propeller Shafts: Precision - Universal Joint, Part Number: 380, UPC: 746079016442
Detailed Description
Lubricateable?: Yes
Lube Fitting Location: Flush-Type Lube Fitting In Bearing
Bearing Type: Round Plain
Bearing Diameter: 1.063" (27.0mm)
Width (to caps): 3.220" (81.7mm)
OE Series: Spicer 1310
Standard Tire Size
Standard tire size: F78 – 15 or (P205/75R15 or optionally P215/70R15)
Tire width (mm): 198 mm
Tire sidewall factor: 78
Rim size (in): 15
Total wheel diameter (mm / in):690 / 27.2
Pending/Planned Work:
Touch-up paint.
Installed Upgrades:
4 point seat belts.
Custom off road seats (Front)
Custom Duster – Sunbrella Black Cherry c/w Black 2” Webbing Back Panel.
Stainless Steel Fasteners.
“Painless” Brand wiring
MDS Ignition (MSD 6A – Part #:6200 Serial #:595799)
MDS Pro-Billet Distributor Model #: 8523
Pints oz. Quarts Gallon Pints Quarts Gallon
Engine - 304 V8 SAE-30 10 160 5 1.25 4.73 8.3 4.2 1.04
Cooling System - 304 V8 26 416 13 3.25 12.3 21.6 10.8 2.71
Transfer Case - Dana 20
SAE 80 Gear Lube (API,
GL-4)
3.25 52 1.63 0.41 1.54 2.7 1.4 0.34
Transmission - T15 3 speed
SAE 80 Gear Lube (API,
GL-4)
2.75 44 1.38 0.34 1.3 2.3 1.1 0.29
Total: 6 96 3.0 0.75 2.84 5.0 2.5 0.62
Differential - Front - Dana 30
SAE-80 (Mil-L-2105B) 2.5 40 1.25 0.31 1.18 2.1 1.0 0.26
Differential - Rear - Dana 44
SAE-80 (Mil-L-2105B) 3.0 48 1.50 0.38 1.42 2.5 1.2 0.31
Total: 5.5 88 2.75 0.69 2.6 4.6 2.3 0.57
US
Imperial
Litre
CJ5 Capacities
Spec
MDS High Energy “Blaster” Coil
MDS Super Conductor Spark Plug Wires
Edelbrock Carburetor – Model 1406 (7241) 600 CFM, Electric Choke, Calibrated for Fuel
Economy.
Designed for small-block and small displacement big-block engines, these carbs are
recommended only for stock to Performer level applications. They are not recommended
for use on RPM or Torker II intake manifolds. Match with an Edelbrock Performer or
Performer EPS manifold and other brands of similar design. Calibrated 2% leaner than
#1405. Includes both timed and full vacuum ports for ignition advance. Comes with:
Metering Jets - Primary .098, Secondary .095; Metering Rods - .075 x .047; Step-Up
Spring - yellow (4" Hg). Use our Carb Stud Kits #8008 or #8024 if needed, see
Installation Items. For auto trans throttle lever adapters and more, see Tuning
Accessories.
Edelbrock Performer Intake Manifold – Part #: 2131 (Non-EGR, 0 – 5500 RPM)
AMC 290-401 V8
PERFORMER AMC (idle-5500 rpm)
Designed for 1970-91 street 290-304-343-360-390-401 c.i.d. V8 engines. #2131 is a stock
replacement/street legal part on 360-401 V8s with OEM carb; 1970-72; except stock equipped EGR.
Custom Chrome Open Air Cleaner
o O/D 13 5/8” – 13 ¾”
o Thickness: 1”
o Fram CA136
o AC Delco: AC212CW, AC212CWR, A279C, A690C
o WIX: 42095
o Motorcraft: FA75R
Warn Winch – MX6085 (M= MRV-8-7 N= 17103)
Full Roll Cage
Custom Light Bar (Knuklebusters)
Eclipse 40" Off Road LED Light Bar - 120W
Tow Bar
Headers and Dual Exhaust
Custom Gauges – 2 5/8” Phantom by Auto Meter -
http://www.autometer.com/cat_gaugelist.aspx?sid=7&opid=2&szid=3
Note: Fuel Gauge Calibration – 73 Ohms (Empty) / 23 Ohms (1/2 Full) / 10 Ohms (Full)
Power Steering – Not stock. Probably a 1975 – 1979 Jeep system added later.
o Pump is www.cardone.com Part #: 20-7879 (Rebuilt unit installed Mar 5, 2012) Note: has
press on pulley, NOT keyed shaft and nut like stock 1974 would have (i.e. NOT a 20-6179).
o Steering Box is www.cardone.com Part #: 27-7521 (Not Confirmed)
Borgeson Steering Shaft. Model - BOR000903
Gel Battery
B.F. Goodrich All-Terrain T/A 33x12.50R15LT 108R M+S Load Range G tires.
Gear Ratio & Tire Size Chart from http://www.jeep4x4center.com/jeep-tires/tire-gear-ratio-chart.htm
Considering making modifications to your Jeep? Whether it is changing an axle or going with different tires this chart is
helpful in finding the right Tire Size to Gear Ratio that you need to achieve the optimal performance for your particular
application.
Also, when making altering your factory gear ratio or wheel size your speedometer and odometer may read incorrect. Make
the necessary changes to your speedo by replacing your Jeep Speedometer Gear .
A basic method to calculate is to mutiply .12 by your tire diameter. (.12 X 38" = 4.56)
The below table can be used to get a rough idea on gear ratios. The colors represent ideal RPM's at highway speeds (65).
These calculations are assuming a manual transmission with a 1:1 ratio. If you drive an automatic your RPMs will be slightly
higher, and the opposite is true if you have overdrive (your RPMs will be slightly lower).
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
Actual Speed
Indicated Speed
1974 CJ5 - 33 x 12.5R15 Tires
Highway cruising and best fuel economy stay towards the yellow (2600 rpm)
Around town daily driving is color coded green (2800 rpm)
Better towing power or just more 4-low power use the ratios near the red (3100 rpm).
Find your Gear Ratio
Tire
Size
3.31
3.42
3.55
3.73
3.91
4.11
4.27
4.56
4.88
5.13
5.29
5.38
5.71
6.17
7.17
27"
2677
2766
2872
3017
3163
3325
3454
3689
3947
4150
4279
4352
4619
4991
5800
28"
2582
2668
2769
2909
3050
3206
3331
3557
3806
4001
4126
4196
4454
4813
5593
29"
2493
2576
2674
2809
2945
3095
3216
3434
3675
3863
3984
4052
4300
4647
5400
30"
2410
2490
2584
2715
2846
2992
3109
3320
3553
3735
3851
3917
4157
4492
5220
31"
2332
2409
2501
2628
2755
2896
3008
3213
3838
3614
3727
3790
4023
4347
5051
32"
2259
2334
2423
2546
2696
2805
2914
3112
3331
3501
3610
3672
3897
4211
4894
33"
2191
2263
2349
2469
2588
2720
2826
3018
3230
3395
3501
3561
3779
4093
4745
34"
2126
2197
2280
2396
2512
2640
2743
2929
3135
3295
3398
3456
3668
3963
4606
35"
2065
2134
2215
2328
2440
2565
2664
2845
3045
3201
3301
3357
3563
3850
4474
36"
2008
2075
2154
2263
2372
2493
2590
2766
2961
3112
3209
3264
3464
3743
4350
37"
1954
2019
2095
2203
2308
2426
2520
2692
2881
3028
3123
3176
3370
3642
4243
38"
1902
1966
2040
2144
2247
2362
2454
2621
2805
2948
3040
3092
3282
3546
4121
39"
1854
1915
1988
2089
2190
2302
2391
2554
2733
2873
2962
3013
3198
3455
4015
40"
1807
1867
1938
2037
2135
2244
2331
2490
2664
2801
2888
2937
3118
3369
3915
41"
1763
1822
1891
1987
2083
2189
2275
2429
2599
2733
2818
2866
3042
3287
3819
42"
1721
1778
1846
1940
2033
2137
2220
2371
2538
2668
2751
2798
2969
3208
3728
43"
1681
1737
1803
1894
1986
2087
2169
2316
2479
2606
2687
2733
2900
3134
3642
44"
1643
1698
1762
1851
1941
2040
2119
2263
2422
2546
2626
2670
2834
3063
3559
Superlift 4” Suspension Lift (http://www.superlift.com/lift-kits/4-inch-1995-1975-jeep-suspension-
lift-kit.asp)
o Master Pack: K712
o Rear Springs: 01-503R-6
o Front Springs: 01-503F-6
Reverse Shackles
Body Lift (1 inch). Polyurethane bushing kit for body and suspension
Manufacturers Stock Data
Make:
Jeep
Model:
CJ-5
Type:
CJ-5 AMC
EEC segmentation:
J (sport utility cars and off-road vehicles)
Class:
compact off-road / SUV (sport utility vehicle)
Body style:
open off-road, opt. soft-top
Doors:
2
Traction:
4x4 part-time (rear permanent, front engaged manually in off-road conditions)
Identification Data
JEEP CJ-5 304 V-8
as offered for 1974 in North America U.S.
Production/Sales Period:
1972 - 1975
Modelyears:
1973 - 1975
Country of origin:
USA
Dimensions and Capacities
Length:
138.2 in (3,510 mm)
Width:
68.5 in (1,740 mm)
Height:
67.7 in (1,720 mm)
Wheelbase:
83.5 in (2,121 mm)[13] (1972-1983)
Front track:
1308 mm / 51.5 in
Rear track:
1270 mm / 50 in
Ground clearance:
203 mm / 8 in
Fuel capacity:
57 litre / 15.1 U.S. gal / 12.5 imp. gal
Turning circle btw. curbs:
10.03 m / 32.9 ft
Drag coefficient estimated by a-c:
0.8
Interior length:
Interior width:
Boot length max.:
914 mm / 36 in
Boot width:
1010 mm / 39.8 in
Weights
Curb weight (without a driver):
2,665 lb (1,209 kg)
GVWR:
3650 lb (1655.6 kg)
GAWR (Front):
2200 lb (997.9 kg)
GAWR (Rear):
2700 lb (1224.7 kg)
Payload:
985 lb (446.8 kg)
Power Train
Engine manufacturer:
AMC 304 V8
Engine type:
spark-ignition 4-stroke
Fuel type:
petrol (gasoline)
Fuel system:
carburetor
Charge system:
naturally aspirated
Valves per cylinder:
2
Valves timing:
Additional features:
Motorcraft 2-barrel, OHV
Cylinders alignment:
V 8
Displacement:
4981 cm3 / 303.9 cui
Bore:
95.25 mm / 3.75 in
Stroke:
87.38 mm / 3.44 in
Compression ratio:
8.4 : 1
Power net:
112 kW / 152 PS / 150 hp (SAE net) / 4200
Torque:
332 Nm / 245 ft-lb/ 2500
Redline rpm:
Performance
Theoretical Top speed:
145 km/h / 90 mph (w/o speed governor)
Top speed:
135 km/h / 84 mph
Acceleration:
0-30 km/h (s):
1.7
0-40 km/h (s):
2.1
0-50 km/h (s):
2.7
0-60 km/h (s):
3.7
0-70 km/h (s):
4.6
0-80 km/h (s):
5.6
0-90 km/h (s):
7.5
0-100 km/h (s):
9.6
0-110 km/h (s)
12
0-120 km/h (s):
15.1
0-130 km/h (s):
19.6
0-140 km/h (s):
30
0-20 mph (s):
1.8
0-30 mph (s):
2.6
0-40 mph (s):
4.1
0-50 mph (s):
5.7
0-60 mph (s):
8.9
0-70 mph (s):
12.8
0-80 mph (s):
18.9
0-90 mph (s):
120.9
0- 1/4mile (s):
16.8
speed at 1/4mile:
124 km/h / 77 mph
0- 1km (s):
32.5
Acceleration in gears:
60-100 km/h 3rd gear:
7.5 seconds
80-120 km/h 3rd gear:
9.4 seconds
40-60 mph 3rd gear:
6.0 seconds
50-70 mph 3rd gear:
7.0 seconds
Overtaking factors:
60-100 km/h:
5.9 seconds
80-120 km/h:
9.4 seconds
40-70 mph:
8.7 seconds
50-90 mph:
115.2 seconds
Fuel consumption
extra-urban
city
highway
average
combined
l/100km:
18 - 23
29 - 37
22 - 28
25.1
mpg (imp.):
12 - 16
8 - 10
10 - 13
11.3
mpg (U.S.):
10 - 13
6 - 8
8 - 11
9.4
km/l:
4.0 – 6.0
2.7-3.4
4.0 - 5.0
4.0
Spark Plugs
Brand
Type
Stock #
Part #
Autolite
Platinum
AP65
Champion
Platinum
3405
3405
Champion
Traditional
405
RN14YC
Bosch
Platinum Plus
4037
WR9LP+
Bosch
Super Plus
7922
WR10LC
NGK
V-Power
2635
GR4
NGK
G-Power
2763
GR4GP
NGK
Iridium IX
7149
GR4IX
Ignition Timing – MSD Ignition and Distributor
Circumference of dampener = 546 mm. 10o = 15.17 mm, 20o = 30.33 mm, 30o = 45.5 mm, 40o = 60.67
mm
Setting idle Mixture – Edelbrock 1406 Carb (Note: Mar 12/2012 Emission test passed with each screw
set at 12/8 open)
Note: Idle mixture screws are very sensitive. 1/8 turn is enough to change air/fuel mixture > 1%. Need
to use air/fuel ratio meter to set accurately for emission testing.
1. Prior to beginning any tuning we made sure the choke was set properly. It should be connected to
a 12V key-on source. With a cold motor and the choke flap closed there should be no less than
.100" clearance as shown. Other things to check are fuel pressure of no more than 6psi and
proper float adjustment.
2. For the purposes of setting idle mixture we used a tach/dwell meter, spare Autometer vacuum
gauge, and standard screwdriver. The Edelbrock EPS manual is a great reference and the rod
and jet kit will be used for the primary and secondary tuning later in this article.
3. Setting idle mixture should be done with the engine at full operating temperature (choke fully
open) and the car in Park, or neutral for manuals. Prior to starting up the car we gently seated the
idle mixture screws and then backed them out 2 full turns. We were confident this would make
our idle mixture slighty rich to start.
4. At this point, we fired up the engine and let it get up to operating temperature (thermostat open).
Once the car reached operating temperature, we shut it down.
5. Next, we connected our tach/dwell meter. Typically, one lead connects to the negative side of the
coil while the other attaches to a good ground. Alternatively you can have a helper read off the
rpms from a dash mount tach.
6. We hooked up our vacuum gauge to manifold vacuum and set the gauge in a safe spot where it
couldn't roll into the fan or on to a hot exhaust header.
7. We fired the car back up and with the car in Park, we read an idle speed of around 730 RPM.
8. We gave the idle speed screw a slight turn clockwise to bump the idle speed to exactly 750 RPM.
A good starting point.
9. Next, we took note of our vacuum reading before we began adjusting the idle mixture screws. At
2 turns out we had just under 15" Hg.
10. After adjusting both idle mixture screws our idle speed increased from 750 RPM up to 800 RPM.
11. We adjusted the idle speed back down to 750 RPM.
12. Finally, we noted the effect the corrected idle speed had on our vacuum reading. Looked good.
Remember, the goal of adjusting idle speed is to achieve the highest idle vacuum you can
at a set idle speed.
