Parts for the

Dana Model 20 Transfer Case

The Jeep & IH Dana Spicer 20 is still one of the most respected transfer cases on the trail. Professional level repair, assembly and upgrade work is possible for the conscientious shade tree builder.

In addition to our master rebuild kits, we offer nearly all parts at the component level, as well as several upgrade part options.

These kits fit all Jeep Dana 20 Transfer cases and most IH Dana 20 transfer cases.

The Master Rebuild Kit

Our master rebuild kit has been assembled for our customer's rebuilds as well as our own. It is the most complete kit we've seen anywhere and features all the consumable and wear item components. All kits include all the bearings, seals, gaskets, shims, small parts, intermediate shaft, and comprehensive rebuild guide.

Dana 20 master rebuild kit

Our exclusive intermediate shafts are made at Novak from an alloy gear steel and case-hardened to exceptional hardness and have o-ring grooves at both ends, assuring a better seal than factory; extra o-rings are also included.

Kit 20MR, master rebuild, Jeep & IH Dana Spicer Model 20 transfer cases

Installation Requirements

It is very common for our customers to do top-level rebuild work, using good methods and by following our included instruction guide. We suggest the rebuilder have access to a set of snap ring pliers, and a small arbor press, in addition to standard shop tools. The full rebuild procedure is covered here.

The Intermediate Shaft Kits

These kits are a reduced version of our Master Kits. They contain the specially hardened intermediate shaft, O-rings, thrust washers, bearings and snap ring.

Kit TCL, intermediate shaft, Dana 1-1/4” transfer cases

Dana 20 Billet Bottom Cover Pan

This extended capacity, anodized billet aluminum bottom pan solves a few Dana transfer case dilemmas:

  • Thick, machined mating flange replaces the dimpled, warped sheet metal original
  • Drip free sealing surface with the use of RTV or RTV + gasket
  • Increased fluid capacity by 16 oz
  • Adds rigidity to the structure of the transfer case
  • Superior heat shedding

Included are the stainless socket head button cap screws, drain plug and sealing washer. Read the review at


Kit D328-D, billet aluminum bottom cover pan, Dana transfer cases, deep version

Dana 20 Gaskets & Seals Set

Dana 20 gasket and seal kit

There's not a better gaskets and seals kit available. The pan gasket itself (otherwise the most prone to leaking) is cut from a rubber-cork compound.

Kit GS18, gaskets, seals, and shim pack for the Model 18 & 20 transfer cases

Other Components

Many parts are available for the Dana 20, including gears, shafts, etc.

Dana 20 Transfer Case Exploded Diagram

1. Companion Flange
1. Shift Rod - Rear Output Shaft Shift Fork
2. Shift Rod - Front Output Shaft Shift Fork
3. Shift Rod Oil Seal
4. Interlock Plug
5. Interlock
6. Poppet Ball Spring *
7. Poppet Ball *
8. Front Bearing Cap
9. Front Bearing Cap Gasket *
10. Front Output Shaft Thrust Washer *
11. Front Output Shaft Gear
12. Front Output Shaft Sliding Gear
13. Setscrew
14. Front Output Shaft Shift Fork
15. Front Output Shaft
16. Front Output Shaft Spacer *
17. Front Output Shaft Front Bearing Cup *
18. Front Output Shaft Front Bearing *
19. Filler Plug
20. Transfer Case
21. Thimble Cover
22. Front Output Shaft Rear Bearing *
23. Front Output Shaft Rear Bearing Cup *
24. Front Output Shaft Rear Bearing Cup Shims *
25. Cover Plate
26. Intermediate Shaft *
27. Intermediate Shaft 0-ring *
28. Lock Plate
29. Lock Plate Bolt
30. Rear Output Shaft Front Bearing *
31. Rear Output Shaft Front Bearing Cup *
32. Speedometer Drive Gear
33. Rear Output Shaft Bearing Shim *
34. Rear Bearing Cap Gasket *
35. Rear Bearing Cap
36. Breather
37. Rear Output Shaft Rear Bearing Cup *
38. Rear Output Shaft Rear Bearing *
39. Rear Bearing Cap Oil Seal *
40. Rear Yoke
41. Rear Yoke Washer
42. Rear Yoke Nut
43. Speedometer Sleeve
44. Speedometer Driven Gear
45. Speedometer Bushing
46. Bottom Cover Gasket *
47. Bottom Cover
48. Drain Plug
49. Rear Output Shaft
50. Rear Output Shaft Sliding Gear
51. Main Shaft Gear
52. Setscrew
53. Rear Output Shaft Shift Fork
54. Intermediate Gear Thrust Washer *
55. Intermediate Gear Bearing Spacer *
56. Intermediate Gear Shaft Needle Bearings *
57. Intermediate Gear Bearing Spacer *
58. Intermediate Gear
59. Intermediate Gear Shaft Needle Bearings *
60. Intermediate Gear Bearing Spacer *
61. Intermediate Gear Thrust Washer *
62. Front Bearing Cap *

Turn Key, Fully Rebuilt Transfer Case

Our Dana 20 is professionally and meticulously rebuilt. We use the best components, including bearings, bushings, seals and gaskets built by our Dana 20 specialists and experts. All known updates and improvements are performed. Put the experience of thousands of Dana transfer case rebuilds to work for your Jeep.

Because of the variations involved and shipping options available, we encourage you to contact us directly by phone or e-mail. We will help you put together the transfer case which best fits your requirements.

Note that we can supply a core Dana 20 or we can arrange to have yours sent in with a core credit of $400. Transfer cases are built to order and typically take 1-3 weeks to ship. Contact us for current build times. Costs range from $1,667. to $1,795. depending on your configuration, shifters, etc.

Dana Model 20 Transfer Case


your transfer case package is palleted and wrapped (if trucking is required) or packaged in a double-wall box (if by parcel), fully insured and ready to bolt into your application. Novak will seek the best competitive shipping rates with our extensive trucking networks. It will arrive at a location of your choosing, though we strongly recommend a business location with a dock / forklift for delivery (if trucking), as residential and liftgate fees can add up to an extra $100. per delivery.

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