speedo gear change
#1
Racer
Thread Starter
speedo gear change
Hello all:
My speedometer was not functioning. I narrowed the issue down to an internal transmission problem--the drive gear.
After getting the tail housing off of the transmission, I found that the drive gear was not in the proper place, and the clip was non existent.
The odd thing is that the drive gear almost seems to be press fit--it does not slide easily (or at all) past the smooth portion of the output shaft.
Is this just a matter of "tapping" it along to get it in the right place?
i don't want to start tapping or pounding on anything without checking with some experts!
thanks!
My speedometer was not functioning. I narrowed the issue down to an internal transmission problem--the drive gear.
After getting the tail housing off of the transmission, I found that the drive gear was not in the proper place, and the clip was non existent.
The odd thing is that the drive gear almost seems to be press fit--it does not slide easily (or at all) past the smooth portion of the output shaft.
Is this just a matter of "tapping" it along to get it in the right place?
i don't want to start tapping or pounding on anything without checking with some experts!
thanks!
#2
Racer
Thread Starter
OK--so I got the new gear on the shaft with a light tappping. In the process, I broke the clip that is supposed to hold it in place.
2 Questions:
1. How do I get it back off of the shaft to try a reinstall (there is no way can get in there to tap it in the opposite direction...
2. how do I get it re-installed, without breaking the clip?
2 Questions:
1. How do I get it back off of the shaft to try a reinstall (there is no way can get in there to tap it in the opposite direction...
2. how do I get it re-installed, without breaking the clip?
#3
Team Owner
OK--so I got the new gear on the shaft with a light tappping. In the process, I broke the clip that is supposed to hold it in place.
2 Questions:
1. How do I get it back off of the shaft to try a reinstall (there is no way can get in there to tap it in the opposite direction...
2. how do I get it re-installed, without breaking the clip?
2 Questions:
1. How do I get it back off of the shaft to try a reinstall (there is no way can get in there to tap it in the opposite direction...
2. how do I get it re-installed, without breaking the clip?
I'm not relishing the thought of yanking the tranny to replace the gear, but it seems like doing it with it in the vehicle is going to be a bear...
#4
Racer
Thread Starter
I did...
I had to clear some extra space to work--once I did, it was way easier than I thought.
The crossmember has a plate bolted to it, to which the trans is bolted.
I put a jack under the the trans, and removed the plate....all the room needed to remove the rear housing, and get appropriate tools in to tap the gear either way, as needed.
I had to clear some extra space to work--once I did, it was way easier than I thought.
The crossmember has a plate bolted to it, to which the trans is bolted.
I put a jack under the the trans, and removed the plate....all the room needed to remove the rear housing, and get appropriate tools in to tap the gear either way, as needed.
#5
Team Owner
I did...
I had to clear some extra space to work--once I did, it was way easier than I thought.
The crossmember has a plate bolted to it, to which the trans is bolted.
I put a jack under the the trans, and removed the plate....all the room needed to remove the rear housing, and get appropriate tools in to tap the gear either way, as needed.
I had to clear some extra space to work--once I did, it was way easier than I thought.
The crossmember has a plate bolted to it, to which the trans is bolted.
I put a jack under the the trans, and removed the plate....all the room needed to remove the rear housing, and get appropriate tools in to tap the gear either way, as needed.
Being a '69, mine has a welded crossmember, so finding the extra space to pull this off in car might pose a challenge. Thanks.
#6
Racer
Thread Starter
Mine is a 77 with a TH350...
I at first thought I was going to have to remove the crossmember (autos have a bolt in crossmember).
I found that the trans does not bolt directly to the crossmember on mine. There is a plate held to the crossmember by 4 bolts (2 on top, two on the sides), plus 2 bolts to the trans mount.
Not sure of the configuration on a '69, though....I suspect it would be similar.
I at first thought I was going to have to remove the crossmember (autos have a bolt in crossmember).
I found that the trans does not bolt directly to the crossmember on mine. There is a plate held to the crossmember by 4 bolts (2 on top, two on the sides), plus 2 bolts to the trans mount.
Not sure of the configuration on a '69, though....I suspect it would be similar.
#8
Instructor
When I took the speedo gear off my '79 TH350, I was able to slide a open-end wrench over the output shaft just in front of the gear, and gently tapping the wrench with a mallet drove the gear off the end of the shaft. I didn't have to unbolt the crossmember or mounting bracket, just the tailhousing.
The gear was not marred by the wrench, but I think I might have been more hesitant if I planned to reuse it.
The gear was not marred by the wrench, but I think I might have been more hesitant if I planned to reuse it.