1978-87 Rear Differential - GM 10 Bolt with 8-1/2" Ring Gear

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Kit components may vary from illustration depending on your truck's model.
How to choose the correct Ring & Pinion: Each ring and pinion gear set sold below is for replacement use only. Gear ratio changes are possible as long as the ratio selected is within the range of ratios available for the carrier. See chart below for carrier/case breaks by differential model.
10 Bolt
Series 2 = 2.56 - down (smaller numerically)
Series 3 = 2.73 - up (larger numerically)

AT = Automatic Transmission

Full Parts List
Part # Description Application Reqd Price Stock Status QTY.
1978-87 STD Cab 1/2 Ton
1 34-2786
Finish:
Machined
Material:
Steel
Finish:
Machined
Material:
Steel
Axle Shaft-28 Spline 2 Wheel Drive 1/2 Ton 78-87 2 $79.95 In Stock
QTY Required
1 34-2787
Finish:
Machined
Material:
Steel
Finish:
Machined
Material:
Steel
Axle Shaft-28 Spline 4 Wheel Drive 1/2 Ton 78-87 2 $99.95 In Stock
QTY Required
2 30-1614
Lock Clip-Axle 1/2 Ton 78-87 2 Temporarily
Out Of Stock
No Backorders
3 34-0150
Seal 1/2 Ton 78-87 2 Temporarily
Out Of Stock
No Backorders
4 34-0520
Material:
Steel
Material:
Steel
Wheel Bearing 1/2 Ton 78-87 2 $10.95 In Stock
QTY Required
5 34-0452
Material:
Steel
Material:
Steel
Side Bearing 1/2 Ton 78-87 2 $19.95 In Stock
QTY Required
6 30-2921
Finish:
Plain
Material:
Steel
Finish:
Plain
Material:
Steel
Spacer 1/2 Ton 78-87 2 $7.95 In Stock
QTY Required
7 30-1980
Color:
Black
Material:
Magnet
Color:
Black
Material:
Magnet
Case Magnet 1/2 Ton 84-87 1 $11.95 In Stock
QTY Required
8 30-1969
Color:
Black
Finish:
Phosphate
Material:
Steel
Color:
Black
Finish:
Phosphate
Material:
Steel
Filler Plug 1/2 Ton 78-87 1 $4.50 In Stock
QTY Required
9 32-9219
Finish:
Zinc
Material:
Steel
Finish:
Zinc
Material:
Steel
Differential Cover 1/2 Ton 78-87 1 $19.95 In Stock
QTY Required
9 38-1815
Finish:
Chrome
Material:
Steel
Finish:
Chrome
Material:
Steel
Differential Cover-Chrome 1/2 Ton 78-87 1 $19.95 Backordered
QTY Required
10 30-4352
Cover Gasket 1/2 Ton 78-87 1 Temporarily
Out Of Stock
No Backorders
11 30-0260
Finish:
Zinc
Material:
Steel
Finish:
Zinc
Material:
Steel
Bolt 1/2 Ton 78-87 10 $0.25 In Stock
QTY Required
12 30-2543
Finish:
Chrome
Material:
Steel
Finish:
Chrome
Material:
Steel
Bolt Set-Cover-Chrome 1/2 Ton 78-87 1 $7.95 In Stock
QTY Required
13 34-0554
Material:
Steel
Material:
Steel
Differential Master Kit 1/2 Ton 78-87 1 $89.95 In Stock
QTY Required
14 34-0550
Material:
Steel
Material:
Steel
Differential Bearing Kit 1/2 Ton 78-87 1 $69.95 In Stock
QTY Required
15 34-5223
Differential Carrier "A"
  • "A" Fits models without positraction or limited slip differentials.
1/2 Ton 78-87 1 Temporarily
Out Of Stock
No Backorders
  • "A" Fits models without positraction or limited slip differentials.
16 30-0373
Color:
Black
Finish:
Phosphate
Material:
Steel
Color:
Black
Finish:
Phosphate
Material:
Steel
Ring Gear Bolt 1/2 Ton 78-87 12 $1.45 In Stock
QTY Required
1978-87 STD Cab 1/2 Ton
17 32-9081
Finish:
Machined
Material:
Steel
Finish:
Machined
Material:
Steel
Internal Kit-28 Spline "A"
  • "A" Fits models without positraction or limited slip differentials.
1/2 Ton 78-87 1 $94.95 Backordered
QTY Required
  • "A" Fits models without positraction or limited slip differentials.
18 34-5165
Finish:
Plain
Material:
Steel
Finish:
Plain
Material:
Steel
Washer-Pinion Shaft "A"
  • "A" Fits models without positraction or limited slip differentials.
1/2 Ton 78-87 2 $1.95 In Stock
QTY Required
  • "A" Fits models without positraction or limited slip differentials.
19 34-5175
Color:
Black
Finish:
Phosphate
Material:
Steel
Color:
Black
Finish:
Phosphate
Material:
Steel
Washer "A"
  • "A" Fits models without positraction or limited slip differentials.
1/2 Ton 78-87 2 $1.95 In Stock
QTY Required
  • "A" Fits models without positraction or limited slip differentials.
20 34-5160
Color:
Black
Finish:
Phosphate
Material:
Steel
Color:
Black
Finish:
Phosphate
Material:
Steel
Pinion Shaft Lock Screw 1/2 Ton 78-87 1 $2.95 In Stock
QTY Required
21 32-9028
Material:
Steel
Material:
Steel
Ring & Pinion 2.73 1/2 Ton 78-87 1 $184.95 In Stock
QTY Required
21 32-9029
Ring & Pinion 3.08 1/2 Ton 78-87 1 Temporarily
Out Of Stock
No Backorders
21 32-9030
Material:
Steel
Material:
Steel
Ring & Pinion 3.42 1/2 Ton 78-87 1 $179.95 In Stock
QTY Required
21 32-9031
Material:
Steel
Material:
Steel
Ring & Pinion 3.73 1/2 Ton 78-87 1 $189.95 In Stock
QTY Required
21 32-9032
Material:
Steel
Material:
Steel
Ring & Pinion 4.11 1/2 Ton 78-87 1 $179.95 In Stock
QTY Required
22 34-0484
Material:
Steel
Material:
Steel
Rear Pinion Bearing 1/2 Ton 78-87 1 $19.95 In Stock
QTY Required
23 30-2922
Color:
Black
Material:
Steel
Color:
Black
Material:
Steel
Spacer 1/2 Ton 78-87 1 $2.95 In Stock
QTY Required
24 34-0462
Material:
Steel
Material:
Steel
Front Pinion Bearing 1/2 Ton 78-87 1 $16.95 In Stock
QTY Required
25 34-0181
Material:
Steel/Rubber
Material:
Steel/Rubber
Pinion Bearing Oil Seal 1/2 Ton 78-87 1 $6.95 In Stock
QTY Required
26 32-8050
Material:
Steel
Material:
Steel
Yoke 1/2 Ton 78-81 1 $159.95 In Stock
QTY Required
26 32-8051
Material:
Steel
Material:
Steel
Yoke "B"
  • "B" Yoke has tapered ends.
1/2 Ton 82-87 1 $99.95 In Stock
QTY Required
  • "B" Yoke has tapered ends.
26 32-8051
Material:
Steel
Material:
Steel
Yoke Automatic Transmission 1/2 Ton 87 1 $99.95 In Stock
QTY Required
27 30-0605
Finish:
Plain
Material:
Steel
Finish:
Plain
Material:
Steel
Washer 1/2 Ton 78-87 1 $7.95 In Stock
QTY Required
28 30-0793
Color:
Black
Finish:
Phosphate
Material:
Steel
Color:
Black
Finish:
Phosphate
Material:
Steel
Nut 1/2 Ton 78-87 1 $2.95 In Stock
QTY Required
Close
Part # Description Application Reqd Price Stock Status QTY.

Vehicle Application

Includes Parts for the Following Models:

1978 Chevy C10 Pickup 1979 Chevy C10 Pickup 1980 Chevy C10 Pickup 1981 Chevy C10 Pickup 1982 Chevy C10 Pickup 1983 Chevy C10 Pickup 1984 Chevy C10 Pickup 1985 Chevy C10 Pickup 1986 Chevy C10 Pickup 1987 Chevy C10 Pickup 1978 Chevy K10 Pickup 1979 Chevy K10 Pickup 1980 Chevy K10 Pickup 1981 Chevy K10 Pickup 1982 Chevy K10 Pickup 1983 Chevy K10 Pickup 1984 Chevy K10 Pickup 1985 Chevy K10 Pickup 1986 Chevy K10 Pickup 1987 Chevy K10 Pickup 1978 GMC C15 Pickup 1979 GMC C15 Pickup 1980 GMC C15 Pickup 1981 GMC C15 Pickup 1982 GMC C15 Pickup 1983 GMC C15 Pickup 1984 GMC C15 Pickup 1985 GMC C15 Pickup 1986 GMC C15 Pickup 1987 GMC C15 Pickup 1978 GMC K15 Pickup 1979 GMC K15 Pickup 1980 GMC K15 Pickup 1981 GMC K15 Pickup 1982 GMC K15 Pickup 1983 GMC K15 Pickup 1984 GMC K15 Pickup 1985 GMC K15 Pickup 1986 GMC K15 Pickup 1987 GMC K15 Pickup

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