whats stronger 8.25 or 8.75 rear end ?
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cdr
Well-Known Member
wrong place for a question,but the 8.3/4 is better
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Remember:
741 is the weakest and it has the smallest pinion diameter.
The 741 is the weakest of the 8 3/4 rear-ends. (1 3/8")
The 742 introduced later on, better deign, bigger pinion stem diameter (1 3/4")
the 489 introduced after the 742 with a pinion stem diameter 1 7/8"
NOTE: Copied from "My Mopar.com"
8-3/4" Axle Center Section Types
The 8-3/4" axle was available in three basic types. The types are differentiated by the pinion stem diameter....1-3/8", 1-3/4", 1-7/8". The choice of axle pinion assembly was determined based on the application.
1-3/8" small stem pinion (aka. '741')>
Carrier casting numbers: 1820657 (1957-1964), 2070741 (1964-1972). This assembly was typically used in low weight/low horsepower applications through low weight/medium horsepower and high weight/low horsepower applications. Pinion depth and bearing preload is set with shims. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
1-3/4" large stem pinion (aka. '742')
Carrier casting numbers: 1634985 (1957-1964), 2070742 (~1961-1969). This assembly was replaced by a phase-in of the 1-7/8" pinion starting in the 1969 model year. 1970 RW (Plymouth and Dodge mid-size) were the last models to use the 1-3/4" which appeared in a 2881489 case. This assembly was typically used in high weight/medium horsepower applications through high weight/high horsepower applications. Pinion depth and bearing preload is set with shims. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
1-7/8" tapered stem pinion (aka. '489'Carrier casting numbers: 2881488, 2881489 (1969-1974). This assembly was introduced in 1969 and was phased-in to replace the 1-3/4" unit through 1970. Note: the 1-3/4" pinion also appeared in some '489' carriers during this period. By 1973, the '489' was the only unit available in passenger car applications. This assembly was typically used in high weight/medium horsepower applications through high weight/high horsepower applications. Pinion depth is set with shims, preload is set with a crush sleeve. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
All 8-3/4" carrier assemblies can be identified externally by the casting numbers. Additionally, the '741' commonly has a large X cast on the left side, the '742' may have a large 2 cast on the left side, and the '489' has a large 9 cast on the left side. Through 1965, the factory ratio was stamped on the identification boss, followed by an 'S' if Sure Grip equipped. After 1965, a tag was affixed under one of the carrier mounting nuts to identify the ratio. If Sure Grip equipped, an additional Sure Grip lube tag was sometimes affixed; later years sometimes had the filler plug painted orange.
REMEMBER: even though the 741 is smaller and considered the least "Robust" it was "STANDARD" on ALL MAX WEDGE CARS....
741 is the weakest and it has the smallest pinion diameter.
The 741 is the weakest of the 8 3/4 rear-ends. (1 3/8")
The 742 introduced later on, better deign, bigger pinion stem diameter (1 3/4")
the 489 introduced after the 742 with a pinion stem diameter 1 7/8"
NOTE: Copied from "My Mopar.com"
8-3/4" Axle Center Section Types
The 8-3/4" axle was available in three basic types. The types are differentiated by the pinion stem diameter....1-3/8", 1-3/4", 1-7/8". The choice of axle pinion assembly was determined based on the application.
1-3/8" small stem pinion (aka. '741')>
Carrier casting numbers: 1820657 (1957-1964), 2070741 (1964-1972). This assembly was typically used in low weight/low horsepower applications through low weight/medium horsepower and high weight/low horsepower applications. Pinion depth and bearing preload is set with shims. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
1-3/4" large stem pinion (aka. '742')
Carrier casting numbers: 1634985 (1957-1964), 2070742 (~1961-1969). This assembly was replaced by a phase-in of the 1-7/8" pinion starting in the 1969 model year. 1970 RW (Plymouth and Dodge mid-size) were the last models to use the 1-3/4" which appeared in a 2881489 case. This assembly was typically used in high weight/medium horsepower applications through high weight/high horsepower applications. Pinion depth and bearing preload is set with shims. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
1-7/8" tapered stem pinion (aka. '489'Carrier casting numbers: 2881488, 2881489 (1969-1974). This assembly was introduced in 1969 and was phased-in to replace the 1-3/4" unit through 1970. Note: the 1-3/4" pinion also appeared in some '489' carriers during this period. By 1973, the '489' was the only unit available in passenger car applications. This assembly was typically used in high weight/medium horsepower applications through high weight/high horsepower applications. Pinion depth is set with shims, preload is set with a crush sleeve. Differential bearing setting (ie. backlash ) is set with threaded adjusters.
All 8-3/4" carrier assemblies can be identified externally by the casting numbers. Additionally, the '741' commonly has a large X cast on the left side, the '742' may have a large 2 cast on the left side, and the '489' has a large 9 cast on the left side. Through 1965, the factory ratio was stamped on the identification boss, followed by an 'S' if Sure Grip equipped. After 1965, a tag was affixed under one of the carrier mounting nuts to identify the ratio. If Sure Grip equipped, an additional Sure Grip lube tag was sometimes affixed; later years sometimes had the filler plug painted orange.
REMEMBER: even though the 741 is smaller and considered the least "Robust" it was "STANDARD" on ALL MAX WEDGE CARS....
Hemi Rebel
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Dana
Ranidart70
Member
the pinion diameter on the 8 1/4 is 1 5/8 which is actually bigger than a 741.
The 8 1/4 is greatly over looked and one tough rear assembly. They are great if someone is on a budget and are easily found in jeeps and many applications.
I am not going to say if it is stronger or weaker but it sure is a reliable one that can take a big block beating and still keep going.
The 8 1/4 is greatly over looked and one tough rear assembly. They are great if someone is on a budget and are easily found in jeeps and many applications.
I am not going to say if it is stronger or weaker but it sure is a reliable one that can take a big block beating and still keep going.
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Good info Raindart70....
As I mentioned above, the "WEAK" 741 carrier was used on Max Wedge cars...1963 and 1964...
I have one, it is going into my 63 Dodge Max wedge Clone...550 HP +
As I mentioned above, the "WEAK" 741 carrier was used on Max Wedge cars...1963 and 1964...
I have one, it is going into my 63 Dodge Max wedge Clone...550 HP +
spearsvillebob
Active Member
I understand that this is not the correct place for this thread but as long as its running I have a ? My neighbor has a 2000 dodge durango he is parting out. I was thinking about using the rear end if it has posi it is a 4- wheel drive, does it have posi? Tag is 2228 i believe, dealer couldn't tell me, thanks
Hemi Rebel
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give me the last 8 digits of the VIN.
spearsvillebob
Active Member
yf112765. Thanks
Hemi Rebel
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What I dont see is sales code DSA which is limited slip differential(posi is a GM term). It does have DMH 3.92 axle ratio
Vehicle Option - All
Standard Equipment
Code Description Code Description Code Description
ADAS Light Group AJKS Convenience Group
APAS Monotone Paint
BAZS 136 Amp Alternator
BKAS 11x2 Rear Drum Brakes
CGWS Next Generation Front Air Bags**
CJTS Seat Track Cover
CKAS Carpets - Floor and Cargo Area
CKTS Cargo Tie Down Loops
CSRS Passenger Assist Handles
CURS Rear Compartment Storage Tray
DG4S Multi-Speed Auto 45RFE Transmission
DJDS 205MM Front Axle
GBBS Tinted Windshield Glass
GCBS Front Door Tinted Glass
GEGS Deep Tint Sunscreen Glass
GFAS Rear Window Defroster
GMLS Liftgate Door w/Fixed Glass
GXRS Keyless Entry
HAAS Air Conditioning
JAAS Instrument Panel
JAYS Instrument Cluster w/Tach
JBFS Instrument Panel Black Bezel
JCBS 120 MPH Primary Speedometer
JHAS Var Intermittent Windshield Wipers
JHBS Rear Window Wiper/Washer
JJAS Cigar Lighter
JJBS Dual Note Electric Horns
JJMS Auxiliary 12-Volt Rear Power Outlet
JPBS Power Locks
JPDS Power Windows, Driver One-Touch
LACS Illuminated Entry LAFS Key in Ign/Seat Belt Warning Buzzer
LAJS Headlamps On Warning Chimes
LALS Low Washer Fluid Warning Signal
LAMS Door Ajar Warning Lamp
LANS Decklid/Liftgate Ajar Warning Lamp
LDGS Liftgate Flood Lamps
LMBS Halogen Headlamps
LPSS CHMSL Lamp MFNS Body Color Grille
MGAS Ram's Head Badge
MHAS Black Windshield Moldings
MWHS Rear Wheelhouse Liners
NBKS EVAP Control System
NF4S 25 Gallon Fuel Tank
QG8S Forest Green Pearl Coat
SBAS Variable Assist Power Steering
SCDS Luxury Steering Wheel
SDBS Heavy Duty Suspension
SFBS Front Heavy Duty Shock Absorbers
SGBS Rear Heavy Duty Shock Absorbers
SHAS Front Stabilizer Bar
SHCS Rear Stabilizer Bar
TBBS Full Size Spare Tire
TBMS Tire Carrier Winch
XDXS Scissor Type Jack
YAAS Build To U.S. Mkt. Specifications
Z5AS GVW Rating - 6400# 1AES BUX Contract Assembly
135S Zone 35-Washington
6USS U.S. Specifications Label
606S Colorado Ship to State Code
Optional Equipment
Code Description Code Description Code Description
*M5 Cloth High-Back Bucket Seats
-K9 Camel/Tan
ADJ Heavy Duty Service Group
ADL Skid Plate Group
AFH Overhead Convenience Group
AHC Trailer Tow Group
ASPP SLT Decor Group
A29P 4.7L Engine(EVA)/4Spd A/T 45RFE(DG4)
BCQP 750 Amp Maintenance Free Battery
BGK 4-Wheel Anti-Lock Brakes
CADP High Back Bucket Seats
CBVP Cloth Door Trim Panel w/Map Pocket
CFMP 2nd Row 40/20/40 Fold Tumble Seat
CFP 3rd Row Seat
CLEP Front Rear Floor Mats
CUCP Floor Console
CUNP Overhead Console
DGB All 4-Speed Automatic Transmissions
DHAP Lock-Up Torque Converter
DHC Full-Time Transfer Case
DMH 3.92 Rear Axle Ratio
DRAP Corporate 8.25 Rear Axle
EAAC All Engines EVA 4.7L V8 MPI Engine
GNCP Sun Visors w/Illum Vanity Mirrors
GNTP Rear View Auto Dim Mirror
GTS Power Heated Mirrors, Fold-Away
GVBC All Vehicles W/Power Mirrors
HBA Rear Air Conditioning w/o Heater
HGAP Hood Insulation
JJJP 12V Power Outlet Mounted in IP
JPSP Power 6-Way Driver Seat
K2HP FOREST GREEN PEARL-COAT - MOLDING -
K5HP FOREST GREEN PEARL-COAT WHEEL FLARe
LBCP Glove Box Lamp
LBDP Ash Tray Lamp
LCDP Map/Dome Reading Lamps
LDAP Underhood Lamp
LNJP Fog Lamps
MBQP Body Color Rear Fascia
MDAP Front License Plate Bracket
MLHP Body Color Front Fascia
MURP Dodge Badge
MUSP 4X4 Badge
MUZP SLT Badge
MWGP Roof Rack
MZJP Durango Bright Badge
NAA Federal Emissions
NBHP High Altitude Emissions Tracking
NHBP Auxiliary Transmission Oil Cooler
NHFP Power Steering Cooler
NHMP Speed Control
NMCP Heavy Duty Engine Cooling
PG8 Forest Green Pearl Coat
RAAC All Radio Equipped Vehicles
RAZ AM/FM Cassette Compact Disc Radio
RCK Infinity Speakers
RDDP Fixed Long Mast Antenna
SUAP Tilt Steering Column
TUT 31X10.5R15 OWL All Season Tires
TZAP Goodyear Brand Tires
WJ9P 15X8.0 Aluminum Wheels
WKBP Matching Spare Wheel
XEEP Fuel Tank Skid Plate Shield
XEFP Transfer Case Skid Plate Shield
XEUP Front Suspension Skid Plate
YEP Manuf Statement of Origin
YGFA 8 Additional Gallons of Gas
ZARP Spring - Left Rear
ZBAP Spring - Left Front
ZNRP Spring - Right Rear
ZPAP Spring - Right Front
2TGA Customer Preferred Package 2TG 26G Customer Preferred Package 26G
3AG Price Protection - Code G
3SM 100 GDP Program
3VTA Customer Preferred Discount
4DHA Prepaid Holdback
4EAA Sold Vehicle
4FJA Fleet Daily Rental W/Client Code
4FMA Fleet Option Editor
4FT Fleet Sales Order
4JM Advance Payment Of SFPAP
4ME DTG Corp.
4TR 252+ Code Testing 467 Pre-Retail - Tracking, Fleet 52Q Order Edit By-Pass
Special Equipment
Code Description Code Description Code Description
No Special Equipment Available
Dealer Installed Equipment
Code Description Code Description Code Description
No Dealer Installed Equipment Available
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Moved from for sale forum to Mopar Tech
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