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Replacement of transmission main race 35125-37

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panhead_kicker
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Replacement of transmission main race 35125-37

#1

Post by panhead_kicker » Fri Mar 04, 2011 4:14 am

To remove the tranny main race 35125-37 from the case, the service manual states the transmission case should be heated to 300 deg, and the race pressed out. I see that races can be purchased in oversizes; like .010. What would create a need for an oversize race? Also, is there anything in particular I should be be aware of in performing this replacement?



Bosheff
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Re: Replacement of transmission main race 35125-37

#2

Post by Bosheff » Fri Mar 04, 2011 8:15 am

Warm the case up and drive the race out with a socket if a press is not available. I've never used a press for this operation nor have I ever used an oversized race. I never even knew an oversize racer was available. None of my part books show an oversize race. Be sure to support the case before ya go to pressin' or beatin'....bosheff

Robert Luland
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Re: Replacement of transmission main race 35125-37

#3

Post by Robert Luland » Fri Mar 04, 2011 12:38 pm

Press it out with out heating it up and find out how fast you need an oversize. I did one last week. After heating, the old one came right out with no resistance. Pulled the new Jims one out of the freezer and it fell in to the hole. I get tapping on it for the first five minutes because I was afraid the race would start to creep as temperature equalized. I had a lot of worry about doing this job but in the end it was a simple task. Bob L

Cotten
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Re: Replacement of transmission main race 35125-37

#4

Post by Cotten » Fri Mar 04, 2011 2:24 pm

Panhead_Kicker!

Machining for an oversize race is required when the case bore has been damaged,
either by weld repairs, or a spun race.

Weld repairs need not be a crack to the bore to cause distortion: filling a damaged base stud hole can do it, pulling that 'corner' of the bore out of round.

Races spin when they get hot and shrink, from a lack of lube, water in the lube, improper drivegear endplay, etc.
Carefull measurement of the bore compared to the new race will tell if the proper press will be achieved.

Good luck!

....Cotten

panhead_kicker
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Re: Replacement of transmission main race 35125-37

#5

Post by panhead_kicker » Sat Mar 05, 2011 2:42 am

Thanks folks, thats the kind of tips/advice I was looking for. The race comes out tonight, if the potbelly will get hot enough!
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