- Joined
- May 1, 2010
- Messages
- 1,195
- Reaction score
- 28
- Points
- 48
- Location
- Maine
- Vehicle Year
- 2002
- Make / Model
- Honda
- Engine Size
- K20A3
- Transmission
- Manual
So recently my 2-door Navajo started whining at high speed (50+mph) and and shudders at 15mph when slowing down. The whining and shuddering are not affected by braking, gear position, or clutch position. If I brake moderately hard, braking is smooth until 15-20mph, where the truck will shudder even if I coast down to that speed. If I nail the brakes, like in an emergency stop, I can make the truck shudder at any speed - making me think rotors, but again, brakes do not pulse or anything under normal braking.
This Friday I inspected front wheel bearings, rotors, and hubs, they are all good. I replaced pads anyways since it was apart. I then replaced the rear wheel bearings since I could get a slight tick out of them, and rear drums and rotors. While removing my axle shafts, I noticed that the rear driveshaft has a lot of resistance to it. I checked, tranny is in neutral. If I force the driveshaft to spin, it turns the engine over - tranny in neutral. So, I checked the tranny fluid - it was gear oil. I refilled it with mercon atf as it's an M5OD. The high speed whining is now reduced, and shuddering is reduced.
Now, I know I need a tranny, I've started looking for one. I'll replace it when I replace my clutch next year. I'll drive it as-is for now, it still goes through the gears fine, and shifts a LOT better with the atf in it. My question is, what is causing the vibrations? Is it really the tranny? Why can't I freely spin my driveshaft? Should I replace my radius arm bushings for the hell of it? They don't seem bad, they've been on the truck a while and have a little noticeable wear but are not worn yet. My next repair is tires, front shocks, and alignment. I'm going with treadwrights and monroe shocks (supposedly close to stock, and what I have on the rear now.)
This Friday I inspected front wheel bearings, rotors, and hubs, they are all good. I replaced pads anyways since it was apart. I then replaced the rear wheel bearings since I could get a slight tick out of them, and rear drums and rotors. While removing my axle shafts, I noticed that the rear driveshaft has a lot of resistance to it. I checked, tranny is in neutral. If I force the driveshaft to spin, it turns the engine over - tranny in neutral. So, I checked the tranny fluid - it was gear oil. I refilled it with mercon atf as it's an M5OD. The high speed whining is now reduced, and shuddering is reduced.
Now, I know I need a tranny, I've started looking for one. I'll replace it when I replace my clutch next year. I'll drive it as-is for now, it still goes through the gears fine, and shifts a LOT better with the atf in it. My question is, what is causing the vibrations? Is it really the tranny? Why can't I freely spin my driveshaft? Should I replace my radius arm bushings for the hell of it? They don't seem bad, they've been on the truck a while and have a little noticeable wear but are not worn yet. My next repair is tires, front shocks, and alignment. I'm going with treadwrights and monroe shocks (supposedly close to stock, and what I have on the rear now.)