DoctorDiff Drivetrain

.

Products Products

Drivetrain

Sort by Alphabetical: A to Z
48 Per Page
"Powr-Lok" Clutch Pack
$117.00
Dana 60

"Powr-Lok" clutch pack includes the plates and discs necessary to rebuild a Mopar 8 3/4" or Dana 60 clutch-type differential.

In stock
 
Select a Variation
"Powr-Lok" Internal Parts Kit
$185.00
32 Spline Dana 60/70

For Dana 60, Dana 44 or Mopar 8 3/4.  BRAND NEW PARTS FIT HEAVY DUTY, 4 SPIDER GEAR TYPE ("POWR-LOK") SUREGRIP UNITS

In stock
 
Select a Variation
"Powr-lok" Thrust Buttons
$20.00
1 pair of hardened steel thrust buttons (thrust spacers) and 1 roll pin.
In stock
+ −
(8) 8 3/4" Clutch Sure-Grip LH thread case-half bolts
$65.00

Ten press-in wheel lug studs for Mopar 8 3/4" axle shafts.

Out-of-stock
1350 to 7260 Conversion U-Joint
$50.00
Hard to find combination U-joint mates a standard, small 7260 Mopar driveshaft to a large, heavy duty Spicer type 1350 (U-bolt) yoke. 
In stock
+ −
1350 to 7290 Conversion U-Joint
$50.00

Hard to find combination U-joint mates a standard, big 7290 Mopar driveshaft to a large, heavy duty Spicer type 1350 (U-bolt) yoke.

In stock
+ −
1350 Transmission Slip Yoke
$95.00
29/30 Spline for 727 automatic/A883 manual

Fully machined 4130 cr-mo 1350 slip yoke fits Mopar rear wheel drive applications.

In stock
 
Select a Variation
1350 U-bolt Pinion Yoke Package
$70.00
10 Spline 8 3/4"

FORGED STEEL 1350 U-bolt yoke for Dana and Mopar 8 3/4" and 9 1/4" pinions.

In stock
 
Select a Variation
7260 to 7290 Conversion U-Joint
$30.00

Hard to find combination U-joint mates a small 7260 Mopar driveshaft to a large 7290 Mopar yoke.

In stock
+ −
7290 Transmission Slip Yoke
$85.00

Cast iron 7290 slip yoke fits Mopar 727 automatics and 29/30 spline A833 4 speed transmissions.

In stock
+ −
7290 U-Bolt Pinion Yoke Package
$70.00
10 Spline 8 3/4"

Super duty FORGED STEEL 7290 U-bolt yoke

In stock
 
Select a Variation
8 1/4" Bearing Rebuild Kit
$100.00

Mopar 8.25", 8 1/4", 8 3/8" Bearing Rebuild Kit

In stock
Select options
8 1/4" Ring and Pinion
$195.00
Mopar 8.25", 8 1/4", 8 3/8" Ring and Pinion
In stock
Select options
8 1/4" Spicer "Trac-Lok" Differential
$375.00
8 1/4 " Spicer "Trac-Lok" 2-pinion style clutch sure-grips work nicely for street cars and half ton pickups making under 350 hp.  Fits 2.76 - 4.56 ratio...
In stock
Select options
8 3/4 Carrier Bearings and Races (pair)
$40.00
1.8" (early style)

Your choice of quality Koyo carrier bearings for either late or early model 8 3/4" third members.

In stock
 
Select a Variation
8 3/4" 489 Case Crush Sleeve Eliminator
$40.00

Mopar 8 3/4" 489 Case Crush Sleeve Elminator

In stock
+ −
8 3/4" 489 Case Third Member
8 3/4" 489 Case Third Member
$1,320.00

New, nodular iron 489 casting built with forged steel caps, billet adjusters, crush sleeve eliminator and choice of ratio, yoke, clutch sure-grip or spool.

Select options
489 case kit
8 3/4" bearing rebuild kit
$85.00
489 w/Crush Sleeve, Clutch suregrip or pre-1969 open differentials (1.8" bearing journal), Koyo USA/Japan

Mopar 8 3/4" 489, 741, or 742 case bearing rebuild kit

In stock
 
Select a Variation
8 3/4" Clutch Type Sure-Grip ("Powr-lok")
$395.00
Green non-adjustable wheel bearings

Reproduction 8 3/4" clutch sure-grip ("powr-lok") includes upgraded 1 piece 30 spline side gears and 4340 cr-mo spider gears

In stock
 
Select a Variation
8 3/4" Cone Sure-Grip Shim Pack
$25.00
These shims are used to restore lash between the side gear teeth and spider gear teeth during a Borg Warner cone Sure-Grip rebuild.
In stock
+ −
8 3/4" Eaton Truetrac Differential
$575.00

8.75" Eaton True-Trac fits all 8.75" castings all ratios and all stock axles.

Out-of-stock
8 3/4" Helical Gear Sure-Grip ("Sure-Trac II")
$595.00
DoctorDiff Sure-Trac II is a fully machined, forged steel 8.75" differential with helical worm gears similar to an Eaton True-Trac.
In stock
Select options
8 3/4" Inner Axle Seal
$4.00
Premium quality inner axle seal fits OEM '65-'74 8.75" housings
In stock
+ −
30 spline 8 3/4" spool
8 3/4" Lightweight Spool
$100.00
30 Spline

Lightweight 30 and 35 spline spool fits all 8 3/4" castings and all ratios.

In stock
 
Select a Variation
8 3/4" Minimum Installation Kit
$43.00
741

Handy kit includes the small parts required to perform a Mopar 8 3/4" gear swap.

In stock
 
Select a Variation
489 Case
8 3/4" Nodular Iron Casting
$275.00

New, Mopar  8 3/4" nodular iron 489 casting includes forged steel caps and billet steel adjusters.

In stock
Select options
8 3/4" or Dana 60 Pinion Yoke Repair Sleeve
$15.00
Repair sleeve fits 10 or 29 spline Mopar 8.75" and Dana 60 pinion yokes. 
In stock
+ −
Pinion seal for 741 or 489 case
8 3/4" Pinion Seal
$8.00
For 741 or 489 Case

Premium quality Mopar 8.75" pinion seal.  Choose 742 or 741/489 case

In stock
 
Select a Variation
8 3/4" Pinion Snubber
$45.00

Powder-coated OEM Mopar passenger car 8.75" pinion snubber (various years). 

Out-of-stock
8 3/4" Ring and Pinion
$195.00
741 (10 spline), 3.23, DoctorDiff Gear

8 3/4" ring and pinions for 741, 742, or 489 cases. Various ratios.

In stock
 
Select a Variation
8 3/4" Spanner Wrench
$35.00

8 3/4" Spanner Wrench carrier bearing side adjuster wrench

In stock
+ −
8 3/4" Third Member Gasket
$5.00
Standard

Premium quality Mopar 8 3/4" third member gasket.

In stock
 
Select a Variation
8 3/4" Wheel Lug Studs
$20.00

Ten press-in wheel lug studs for Mopar 8 3/4" axle shafts.

In stock
+ −
Chevy 8.2", 8.5" and 12 bolt passenger car axle bearing kit
8.25" Chrysler axle bearings (PAIR)
$40.00

8.25" Chrysler axle bearing kit includes 2 Precision bearings and 2 seals.

In stock
+ −
9 1/4" Spicer "Trac-Lok" Differential
$395.00

9 1/4 " Spicer "Trac-Lok" 2-pinion style clutch sure-grips work nicely for street cars and half ton pickups making under 350 hp.

In stock
+ −
A-Body 8 3/4" Housing & Axle Package
$775.00

Mopar A-Body 8 3/4" Housing & Axle Package

Select options
Aluminum Ford 9" Center Casting
Aluminum Ford 9" Casting
$275.00

New, aluminum Ford 9" case includes forged aluminum caps and billet adjusters installed.  Choice of carrier bore for 28/31 spline axles or 35 spline axles.

In stock
Select options
AMC 1 Piece Passenger Car Axle Pkg (pair)
$298.00

Eliminate your troublesome stock 2-piece axles with DoctorDiff ONE-PIECE, CUT-TO-FIT 29 spline axle shafts.  Shafts are back oxide plated for corrosion resistance.

In stock
Select options
AMC 20 Green Wheel Bearings (PAIR)
$98.00

AMC 20 Green Wheel Bearings for 1 piece aftermarket axles

In stock
Select options
Axle Pkg '55-'64 Chevy Passenger Car (17 spline)
$295.00
New, high-strength, 17 spline axles fit 1955-1964 Chevy passenger cars with 8.4" third-member ONLY
Select options
Axle Pkg 7 1/4" A-Body Mopar 5X4 1/2" Bolt Pattern (pair)
$298.00

DoctorDiff 5 x 4.5" bolt pattern conversion axles fit '62-'72 A-body 7.25" rearends.

In stock
Select options
Axle Pkg Chevy 12 bolt (pair)
$200.00

Axle packages for '67-'71 Camaros, '64-'72 Chevelles, and '67-'70 Novas with CHEVY 12 bolt C-clip rearends

Select options
Axle Pkg Custom Length Mopar 5X4 1/2" Bolt Pattern (pair)
$305.00
8 3/4" w/35 spline spool (not Mark Williams)

30 or 35 spline, 5 X 4 1/2" bolt pattern axle package for 8 3/4" or Dana 60 with lug studs and Green sealed wheel bearings INSTALLED.

In stock
 
Select a Variation
Custom Length Ford 9" 31 Spline Axle
Axle Pkg Cut-Your-Own Ford 9" 31 Spline (2.436" Brake Pilot/Register)
$295.00
1541 hardened steel axles are ideal for building custom 9" rearends. Cut to Fit.
In stock
Select options
Axle Pkg Cut-Your-Own Ford 9" 31 Spline (2.780" Brake Pilot/Register)
$295.00

1541 hardened steel axles are ideal for building custom 9" rearends. Cut to Fit.

In stock
Select options
Axle package shown with Green Bearing installed
Axle Pkg Stock Length Mopar 5X4 1/2" Bolt Pattern (pair)
$298.00
8 3/4" w/30 spline carrier

30 or 35 spline, 5 X 4 1/2" bolt pattern axle package for 8 3/4" or Dana 60 with lug studs and Green sealed wheel bearings INSTALLED.

In stock
 
Select a Variation
Billet Steel Housing Ends
$85.00

8 3/4" billet steel housing ends fits Mopar spec brakes and MO-400/ST-400 snap-ring style Green wheel bearings

In stock
Select options
Dana 60 "Trac-Lok" Differential
$495.00

Dana 60 Spicer "Trak-Lok" 2-pinion style clutch sure-grips work nicely for street cars making under 400 hp

In stock
Select options
 Prev
1 2
Next