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techtalk:evo:transfinal02 [2017/05/03 16:36] hippysmack [Mainshaft Group] |
techtalk:evo:transfinal02 [2019/04/07 01:49] hippysmack [Final Drive (Trans to Wheel)] |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== EVO: Transmission & Final Drive ====== | ====== EVO: Transmission & Final Drive ====== | ||
| + | |||
| + | ^Click here for tips on [[techtalk:ref:svcproc10#speed_transmission_removal_inspection_installation|4 Speed Transmission Removal / Inspection / Installation]]^ | ||
| + | |||
| \\ | \\ | ||
| - | ====== 1986-1990 4-Speed Constant Mesh Transmission w/Trapdoor ====== | + | ====== 1986-1990 4-Speed Constant Mesh Wet Clutch Transmission w/Trapdoor====== |
| + | |||
| * The rear compartment of the left and right engine case halves form the transmission housing or case. An access cover, or trapdoor, is mounted on the left side of the case (inside) behind the primary cover. The main components of the transmission are mounted to this trapdoor to allow you to detach the one cover (together with all the transmission components) for easy removal and servicing without having to split the engine cases in half which otherwise would be a full engine re-build. | * The rear compartment of the left and right engine case halves form the transmission housing or case. An access cover, or trapdoor, is mounted on the left side of the case (inside) behind the primary cover. The main components of the transmission are mounted to this trapdoor to allow you to detach the one cover (together with all the transmission components) for easy removal and servicing without having to split the engine cases in half which otherwise would be a full engine re-build. | ||
| + | |{{:techtalk:evo:transfinal:1990_4_speed_1_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_2_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_3_by_dave76.jpg?direct&300|}}| | ||
| + | | 1990 4 Speed Transmission ((photos by Dave 76 of the XLFORUM http://xlforum.net/forums/showthread.php?t=513989&highlight=speed )) ||| | ||
| + | |{{:techtalk:evo:transfinal:1990_4_speed_4_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_5_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:88_4_speed_by_wi_duker.jpg?direct&300|}}| | ||
| + | | 1990 4 Speed Transmission ((photos by Dave 76 of the XLFORUM http://xlforum.net/forums/showthread.php?t=513989&highlight=speed)) || 1988 4 Speed by WI_duker)) | | ||
| ====== Specifications ====== | ====== Specifications ====== | ||
| Line 38: | Line 47: | ||
| ===== Transmission ===== | ===== Transmission ===== | ||
| + | * Internal Gear Ratios are the number of clutch gear revolutions to drive the mainshaft sprocket one revolution. | ||
| + | * Overall Gear Ratios are the number of engine revolutions to drive rear wheel one revolution. | ||
| - | ^Year (all models)^Internal Gear Ratios ((Number of clutch gear revolutions to drive mainshaft sprocket one revolution.))^^^^ | + | |
| + | |||
| + | ^Year (all models) Internal Gear Ratios^^^^^ | ||
| ^ |1st|2nd|3rd|4th| | ^ |1st|2nd|3rd|4th| | ||
| |1986|2.52|1.82|1.38|1.00| | |1986|2.52|1.82|1.38|1.00| | ||
| |1987-1990|2.29|1.66|1.25|1.00| | |1987-1990|2.29|1.66|1.25|1.00| | ||
| - | ^Year (all models)^Overall Gear Ratios ((Number of engine revolutions to drive rear wheel one revolution.))^^^^ | + | ^Year (all models)^Overall Gear Ratios^^^^ |
| ^ |1st|2nd|3rd|4th| | ^ |1st|2nd|3rd|4th| | ||
| |1986|10.00|7.25|5.48|3.97| | |1986|10.00|7.25|5.48|3.97| | ||
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| + | |||
| + | ===== Clutch Gear Mainshaft Ball Bearing ===== | ||
| + | |||
| + | 1986-1990 Mainshaft Ball Bearing - Used on All Models ((86-90 HD Sportster Parts Catalog)) | ||
| + | * 9025A - Ball Bearing | ||
| ===== Final Drive (Trans to Wheel) ===== | ===== Final Drive (Trans to Wheel) ===== | ||
| Line 105: | Line 123: | ||
| * Mainshaft third gear and second gear: .040 min. - .080 in. max. | * Mainshaft third gear and second gear: .040 min. - .080 in. max. | ||
| ===== Countershaft Group ===== | ===== Countershaft Group ===== | ||
| + | |||
| + | * Countershaft end bearings: Retained needle roller bearings | ||
| + | * Countershaft needle bearing journal diameter: | ||
| + | * Access door side or end: .7500 - .7495 in. | ||
| + | * Wear limit: .7490 in. | ||
| + | * Right crankcase side or end: .6875 - .6870 in. | ||
| + | * Wear limit: .6865 in. | ||
| + | * Bearing fit in case: Press fit | ||
| + | * Second gear on shaft:.001 - .0025 in. loose | ||
| + | * Low gear needle bearing journal diameter: .6875 - .6870 in. | ||
| + | * Wear limit: .6865 in. | ||
| + | * Clearance between faces: | ||
| + | * Countershaft low and third gear: .040 - .080 in. max. | ||
| + | * Countershaft second gear and third gear: .040 - .080 in. max. | ||
| + | * Countershaft end play: .004 - .015 in. max. | ||
| + | |||
| + | |||
| + | ==== Countershaft Low Gear Changes ==== | ||
| + | |||
| + | ^Countershaft Low Gear -17T^Change Year^Model(s)^Notes^ | ||
| + | |35760-84A \\ Late 1984-1990 ((1979-1985 HD Sportster Parts Catalog pg 51)) ((1986-1990 HD Sportster Parts Catalog pg 37))|Late 1984| | ||
| + | |||
| ===== Discussion ===== | ===== Discussion ===== | ||
| 1986-90 Evo Sportsters: What every owner should know but were afraid to ask\\ | 1986-90 Evo Sportsters: What every owner should know but were afraid to ask\\ | ||
| - | An [[http://xlforum.net/vbportal/forums/showthread.php?t=1971026|__XLForum Thread__]] By Four Speed\\ | + | An [[http://xlforum.net/forums/showthread.php?t=1971026|__XLForum Thread__]] By Four Speed\\ |
