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Parts for the
T90 Transmission

A T90 Transmission

The T90 is as much a tradition as it is a transmission for classic Jeep people. It is a legendary gearbox and surprisingly tough. However, a couple of the T90's kinks are a bit legendary themselves. We carry what it takes to iron them out and make lasting improvements.

The Master Rebuild Kit
After 40 years of rebuilding these transmissions, we've assembled the most complete master rebuild kits available anywhere.

A T90 that pops out of second gear, has excessive noise, leakage and looseness in operation can be repaired and solved.

We excel in providing these kits in our selection of parts, and by also supplying a specially hardened cluster idler shaft, which will provide far longer service and quieter operation.

Rebuild Requirements
It is very common for our customers to do top-level rebuild work, using good methods and by following our instruction guide.

We suggest the rebuilder have access to a set of snap ring pliers and pullers in addition to a standard tool set.

Other T90 Components
Use our parts selector below to purchase hard parts or rebuild parts a la carte.

 

T90 Transmission Rebuild Kit

Kit T90MR-J, master rebuild, T90 transmission, Jeep, 1945-1971
Part #: T90MR-J
Weight: 6.29
Price: $228.00
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For all Jeep T90 transmissions. For side-shift versions, add side-shift seals, below.

For IH Scout T90 parts, contact us and we'll help you determine which rebuild kit or parts will be appropriate.

 

T90 Transmission Exploded Diagram

 

Click on any item description in blue below to expand its details for purchase. You can use your browser's Back button to return to this page and your cart items will remain.

For your reference, all asterixed * items below are included in our master rebuild kit, above.

Items indicated with a "" are not available singly, but are available in the Small Parts Kit, #A below.

 

Kit, small parts, T90 transmission
Part #: 922607
Weight: 0.73
Price: $33.66
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Kit, small parts, T86 transmissions in Jeep CJ, DJ, or C101 w/Buick V6 or T90 transmissions cast with AA & CC
Part #: SP86AA-50
Weight: 2.00
Price: $32.88
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Gaskets set, T90 transmission
Part #: 923301
Weight: 0.12
Price: $7.18
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1. Ring, retaining, front bearing to case *‡
2. Ring, retaining, front input shaft to bearing *‡
Bearing, deep groove ball, single row, with external retaining ring groove, T90 transmission, front
Part #: 643721
Weight: 0.80
Price: $14.95
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4. Slinger, front input bearing *‡
Shaft, input, T90A transmission, 18 tooth, short
Part #: 640428
Weight: 2.50
Price: $83.16
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Shaft, input, T90C transmission, 16 tooth, short, 9-1/8" OAL
Part #: 936448
Weight: 2.40
Price: $91.08
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Shaft, input, T90J transmission, 18 tooth, long
Part #: 906203
Weight: 3.50
Price: $154.61
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6. Bearings, needle rollers, input shaft to mainshaft *‡
Ring, synchronizer, T90 & T86 transmissions (-T & -F only), .358" wide slots, S30T. Jeep T90, all. IH T90, 1961-1963
Part #: 640397
Weight: 0.16
Price: $10.79
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8. Ring, retaining, 2nd-3rd clutch hub to mainshaft *‡
Kit, synchronizer keys & springs, 2nd - 3rd, Jeep T90 transmission (all) & IH T90 (1961-1963)
Part #: T90-K
Weight: 0.10
Price: $4.36
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Kit, synchronizer keys & springs, 2nd - 3rd, Jeep T90 transmission (all) & IH T90 (1961-1963)
Part #: T90-K
Weight: 0.10
Price: $4.36
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Assembly, synchronizer, 2nd - 3rd, T90 transmission
Part #: 640391
Weight: 1.85
Price: $100.98
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Includes the hub and slider as an assembly. It is recommended to purchase these together for optimum fit. Springs, synchro rings and keys are not included
Kit, synchronizer keys & springs, 2nd - 3rd, Jeep T90 transmission (all) & IH T90 (1961-1963)
Part #: T90-K
Weight: 0.10
Price: $4.36
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Assembly, synchronizer, 2nd - 3rd, T90 transmission
Part #: 640391
Weight: 1.85
Price: $100.98
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Includes the hub and slider as an assembly. It is recommended to purchase these together for optimum fit. Springs, synchro rings and keys are not included
Ring, synchronizer, T90 & T86 transmissions (-T & -F only), .358" wide slots, S30T. Jeep T90, all. IH T90, 1961-1963
Part #: 640397
Weight: 0.16
Price: $10.79
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Gear, 2nd, T90 transmission, 30-R22T, Jeep
Part #: 906197
Weight: 1.45
Price: $72.07
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Shaft, main, T90 transmission
Part #: 640390
Weight: 4.00
Price: $101.92
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Gear, 1st & reverse, sliding, T90 transmission, S29-S10T
Part #: 906199
Weight: 2.20
Price: $71.06
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Spacer, mainshaft bearing, T90
Part #: 643621
Weight: 0.05
Price: $8.44
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Retainer, rear output bearing, T90 transmission, 3-5/32"
Part #: 644552
Weight: 0.31
Price: $37.28
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Bearing, deep groove ball, single row, T90 rear output
Part #: 644551
Weight: 1.07
Price: $18.72
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Washer, flat, 7/8", Dana 18/20 interfacing mainshafts
Part #: A1410
Weight: 0.04
Price: $1.26
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Nut, 7/8-16, Nylock, Jeep / Dana mainshafts
Part #: 940970
Weight: 0.08
Price: $4.99
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23. Washer, thrust, cluster gear front *
Gear, cluster, T90A & T90J transmissions, L33-26-19-S14T
Part #: 906200
Weight: 7.01
Price: $166.43
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Gear, cluster, T90C transmissions, L35-26-19-S14T
Part #: 643702
Weight: 6.90
Price: $177.65
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25. Washer, needle bearing spacer *‡
Tube, spacer, counter shaft, slotted, T90 transmission
Part #: 802414
Weight: 0.16
Price: $3.34
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27. Bearings, needle roller, cluster shaft idling *‡
28. Washer, thrust, cluster gear rear *‡
29. Washer, thrust, case to cluster gear *‡
Shaft, counter, T90 & T86 transmissions. Novak ultra-hardened
Part #: 640412
Weight: 1.05
Price: $21.09
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31. Plate, retaining, reverse & cluster idler shafts *‡
Gear, reverse idler, T90 transmission, includes bushing
Part #: 640417
Weight: 0.68
Price: $57.97
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Shaft, reverse idler gear, T90 transmission
Part #: 640420
Weight: 0.70
Price: $20.80
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34. Plug, top cover shift rail port *
35. Spring, shift rail poppet *
36. Ball, shift rail poppet *‡
37. Bolt, top cover *
38. Washer, lock, top cover *
39. Cover, top, control housing
40. Interlock, shifter rails
41. Bolt, front input bearing retainer *
Retainer, front input bearing, T90 transmission, 4 cyl.
Part #: 640422
Weight: 1.50
Price: $30.65
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Seal, oil, front input, IH T19, IH T90 and IH NP435 transmissions
Part #: 12363
Weight: 0.03
Price: $9.01
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44. Gasket, front input bearing retainer *
45. Spring, shifter cane
46. Gasket, top cover *
47. Bolt, oil collector *
48. Collector, oil
49. Plug, drain
50. Case, transmission
51. Plug, fill
Gasket, front face, Dana 18, 3-5/32" bore, 1941-1971, T90 transmission
Part #: 8187
Weight: 0.01
Price: $3.09
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53. Fork, shifter, 2nd-3rd gears
Pin, shift fork, T90 transmission
Part #: 937870
Weight: 0.01
Price: $0.36
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55. Rail, shift, 2nd-3rd gears
56. Rail, shift, 1st-Reverse
57. Fork, shifter, 1st-Reverse gears
Pin, shift fork, T90 transmission
Part #: 937870
Weight: 0.01
Price: $0.36
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Seal, oil, side shifter, T90 transmission
Part #: 640383
Weight: 0.02
Price: $9.68
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60. Cane, shifter