Attention: TDR Forum Junkies 
Howdy,
I've got a NV4500 I'm working on that has a broken mainshaft. I'm trying to decide on the root of the whole mess. A friend of a friend brought it by about three weeks ago with a problem with 3rd gear being hard to shift; not going in 3rd at all. Well, I just got time to work on it this week, and I took it for a testdrive Sunday evening. He had been driving it the whole time 2nd-4th
What a b-i-g jump. I actually got it to go into third without alot of force, but when I put much throttle to it, it would pop out of third HARD. I only done it once, and then I lost 4th. All other gears worked fine.
I got the trans out, and partially disassembled; and the mainshaft is broken right in front of third gear, I also found where the shift stub has been wearing on the top of the 1-2 and 5-R shift rails and in the middle of the 3-4 shift rail.
What would have occured first? Shift tower wear+syncro wear = hard shifting
hard shifting + 2-4 gear changes = broken mainshaft
I'm just curious which happened first and caused the whole mess.
I'll have to talk to the owner, but what will be the best route. It's going to cost a least 1,000 dollars in parts not counting the shift cover. Would it be
better to get a rebuilt transmission?
Is there anybody that sells the early model shift covers? I've seen the late models for sale, but it would cost 500-600$ to retrofit it.
Sorry for the long post.
Steven
I've got a NV4500 I'm working on that has a broken mainshaft. I'm trying to decide on the root of the whole mess. A friend of a friend brought it by about three weeks ago with a problem with 3rd gear being hard to shift; not going in 3rd at all. Well, I just got time to work on it this week, and I took it for a testdrive Sunday evening. He had been driving it the whole time 2nd-4th
What a b-i-g jump. I actually got it to go into third without alot of force, but when I put much throttle to it, it would pop out of third HARD. I only done it once, and then I lost 4th. All other gears worked fine. I got the trans out, and partially disassembled; and the mainshaft is broken right in front of third gear, I also found where the shift stub has been wearing on the top of the 1-2 and 5-R shift rails and in the middle of the 3-4 shift rail.
What would have occured first? Shift tower wear+syncro wear = hard shifting
hard shifting + 2-4 gear changes = broken mainshaft
I'm just curious which happened first and caused the whole mess.
I'll have to talk to the owner, but what will be the best route. It's going to cost a least 1,000 dollars in parts not counting the shift cover. Would it be
better to get a rebuilt transmission?
Is there anybody that sells the early model shift covers? I've seen the late models for sale, but it would cost 500-600$ to retrofit it.
Sorry for the long post.
Steven
