Removing Transmission Main Drive Gear Oil Seal

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1964FLDUO
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Removing Transmission Main Drive Gear Oil Seal

#1

Post by 1964FLDUO »

Is there anyway to remove and replace the Main Drive Gear Oil Seal other than using the Main Drive Gear Oil Seal Tool #95660-42? Or do I need to find someone who has one? If they are not too outrageous I suppose I could justify buying one and adding it to the collection of specialty tools I use once or twice in a decade.
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Re: Removing Transmission Main Drive Gear Oil Seal

#2

Post by Panacea »

Just run a screw or two into the seal, then you can pry it out, don't lose the spacer key...
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Re: Removing Transmission Main Drive Gear Oil Seal

#3

Post by 1950Panhead »

Pierce the rubber next to metal ring with a small screw driver.
Then drive a medium screw driver under the metal ring and pry the seal out.
Jerry
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Re: Removing Transmission Main Drive Gear Oil Seal

#4

Post by Hog54 »

Just dont pry the screwdriver on the outside of the seal like everybody else did and hack up the case.I always hammered a screwdriver right thru the metal part of the seal and got a small piece of wood to go between the screwdriver and the case and pryed it out.Or you could screw a dent puller into the metal part of the seal and it will pop right out.
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Re: Removing Transmission Main Drive Gear Oil Seal

#5

Post by 1964FLDUO »

Hog54 wrote:Just dont pry the screwdriver on the outside of the seal like everybody else did and hack up the case.I always hammered a screwdriver right thru the metal part of the seal and got a small piece of wood to go between the screwdriver and the case and pryed it out.Or you could screw a dent puller into the metal part of the seal and it will pop right out.
Thanks for the tips, but how will I put a new seal in without the tool? I see what you mean by prying on the outside Hog54, someone has already done it a couple times on my transmission. I made sure to keep the little L shaped spacer, panacea.
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Re: Removing Transmission Main Drive Gear Oil Seal

#6

Post by Robert Luland »

Just punch a hole in the thing and screw in a dent puller and wack away. Job done!
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Re: Removing Transmission Main Drive Gear Oil Seal

#7

Post by RUBONE »

someone has already done it a couple times on my transmission.
No, they didn't. those are the remains of the factory stake points used to retain it and likely one previous replacement. Those are NOT pry marks. A dent puller/slide hammer is cheap and easy and also will do other jobs including what it is intended for!
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Re: Removing Transmission Main Drive Gear Oil Seal

#8

Post by caschnd1 »

You'll need to make some kind of a driver to get the seal in place. You just need something you can tap on that will slip over main shaft (assuming you have the mainshaft in the case when you install the seal) and allow you to drive it squarely into the case. The seal needs to be recessessed 0.010" below the edge of the case. If it's exactly flush, the rubber lip can catch on the notch in the spacer where the "L" shaped piece goes.

-Craig
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Re: Removing Transmission Main Drive Gear Oil Seal

#9

Post by Hog54 »

RUBONE wrote:
someone has already done it a couple times on my transmission.
No, they didn't. those are the remains of the factory stake points used to retain it and likely one previous replacement. Those are NOT pry marks. A dent puller/slide hammer is cheap and easy and also will do other jobs including what it is intended for!
Robbie
Well I dont have them stake points on mine and I never seen them on any other transmission that wasnt hacked by lousey mechanics.I cant imagine why they would stake them in cause I have never seen one fall out?I just tap my seal in all the way around lightly with my brass hammer and never had a leak.
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Re: Removing Transmission Main Drive Gear Oil Seal

#10

Post by caschnd1 »

Here is the page from the '48-'57 service manual that talks about staking...
Untitled-124.jpg
Here is my 1946 4-speed case. It's been staked in 3 different places.
DCP_1930.jpg
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Re: Removing Transmission Main Drive Gear Oil Seal

#11

Post by 1964FLDUO »

RUBONE wrote:
someone has already done it a couple times on my transmission.
No, they didn't. those are the remains of the factory stake points used to retain it and likely one previous replacement. Those are NOT pry marks. A dent puller/slide hammer is cheap and easy and also will do other jobs including what it is intended for!
Robbie
That's good to know, should I be staking the new one?. What's a good source for a replacement seal?
Last edited by 1964FLDUO on Tue Feb 07, 2012 4:03 am, edited 1 time in total.
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Re: Removing Transmission Main Drive Gear Oil Seal

#12

Post by Hog54 »

Well I dont know why thier not all staked because thier not including mine.
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Re: Removing Transmission Main Drive Gear Oil Seal

#13

Post by caschnd1 »

Modern seals don't need to be staked. All the ones I've installed have fit so tight there is no worry about them going anywhere. Notice it says to stake the case into the notches in the seal. The seals we buy today don't have notches. I think if you were to stake a seal without a notch you might end up deforming it and causing a leak. Not sure when the seals stopped coming with notches for staking.

-Craig
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Re: Removing Transmission Main Drive Gear Oil Seal

#14

Post by 1964FLDUO »

So just press it in, no loctite or anything, correct?
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Re: Removing Transmission Main Drive Gear Oil Seal

#15

Post by Hog54 »

caschnd1 wrote:Modern seals don't need to be staked. All the ones I've installed have fit so tight there is no worry about them going anywhere. Notice it says to stake the case into the notches in the seal. The seals we buy today don't have notches. I think if you were to stake a seal without a notch you might end up deforming it and causing a leak. Not sure when the seals stopped coming with notches for staking.

-Craig

Im just saying that thier must of been only some trannys they staked because none of the ones I ever worked on were.And theres ones on ebay now that were never staked.

http://www.ebay.com/itm/harley-knuckleh ... 4389178294" onclick="window.open(this.href);return false;
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