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Old 02-16-2011, 01:13 PM   #1
bobthetman
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Default 26 T noisy transmission

I am working on a 26 trans for a friend, the previous owner put a 25 hogs head on it without changing the brake band to the old stile. The car made a god awful noise every time you hit the brake (the wider band was grabbing bough the brake and low speed drum). I opened the trans and found the drive plate rivets loose,one of the clutch disks cracked the low speed drum bushing and the universal ball cap worn. After making the above repairs I reassembled the trans and put it back in service. When I drove the car low speed was ok, however when I went into high gear the trans would howl until I hit 25 to 30 mph. It would also howl when I hit the brake. The triple gears showed some wear on the third gear from the flywheel, could this be the cause or should I look somewhere else?
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Old 02-16-2011, 04:32 PM   #2
Kohnke Rebabbitting
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Default Re: 26 T noisy transmission

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Originally Posted by bobthetman View Post
I am working on a 26 trans for a friend, the previous owner put a 25 hogs head on it without changing the brake band to the old stile. The car made a god awful noise every time you hit the brake (the wider band was grabbing bough the brake and low speed drum). I opened the trans and found the drive plate rivets loose,one of the clutch disks cracked the low speed drum bushing and the universal ball cap worn. After making the above repairs I reassembled the trans and put it back in service. When I drove the car low speed was ok, however when I went into high gear the trans would howl until I hit 25 to 30 mph. It would also howl when I hit the brake. The triple gears showed some wear on the third gear from the flywheel, could this be the cause or should I look somewhere else?
I think the key word here is the previous owners work. If you didn't replace the triple gear pins, the triple gears will be wearing bad on the other gears in low, even if it doesn't sound that bad. In high when everything is locked together, is when it should be the quietest. One of the most important things are new bushings, the right I.D., and at a 90 degree angle to the drums. Check main shaft for wear, and run out, and back of crank flange for run out. The brake drum bushing has to be bored, a 90 degree angle to the drum, and the tail shaft bushing has to be bored , using the brake drum bushing I.D. as a centering point, for the tail shaft, they must be bolted togather. You can not do the tail shaft bushing separately. So, if you have that much noise in high, you just as well tear it down, and take a bunch of pictures and there are Guys here chomping at the bit to help, it's fun. Herm.
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Old 02-16-2011, 07:54 PM   #3
rond
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Default Re: 26 T noisy transmission

Howling in high gear is usually caused by the differential. The noise travels up the torque tube and the transmission becomes a speaker. When in high gear, the transmission input and output are coupled together by the clutch, so the triple gears are not rotating on their pins.
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Old 02-17-2011, 11:43 AM   #4
v8nut
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Default Re: 26 T noisy transmission

I agree with rond. I had a very noisy howl in high gear which disappeared when I put in a new ring and pinion gear.
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Old 02-17-2011, 12:20 PM   #5
bobthetman
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Default Re: 26 T noisy transmission

Thanks for the quick response and good info. I think I am going to check out the rear end this weekend before I open the trans again. Let you know what I find next week. Thanks again for everyones input. Bob
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Old 02-18-2011, 07:53 AM   #6
John Otis
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I had a horrible howling rear wheel bearing once.
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Old 02-19-2011, 08:23 AM   #7
46ford
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Default Re: 26 T noisy transmission

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Originally Posted by bobthetman View Post
Thanks for the quick response and good info. I think I am going to check out the rear end this weekend before I open the trans again. Let you know what I find next week. Thanks again for everyones input. Bob
Probably gonna find worn out thrust bearings, among other things. If you order parts don't forget some spare pins for the thrust bearings...
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Old 02-20-2011, 09:19 PM   #8
bobthetman
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Default Re: 26 T noisy transmission

Thanks, You guys were right on. I opened the rear and found the thrust washers were gone and the ring gear teeth were worn to point. I think I have a few more hours of work to do. Thanks again Bob
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