Welding Shifting Fork S40 Trans
11-24-2012, 04:31 PM
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Welding Shifting Fork S40 Trans
I have opened my 1999 Honda Civic 5 speed to replace the input shaft bearing and upon inspection found the 3/4 shifter fork to be worn pretty badly. I did not have any shifting problems just a noisy bearing. I've heard somewhere that it is possible to built up the worn area by welding then grind down the fork. I have access to a machine shop at work. Has anyone done this with success? Can you pass on some advice? Thanks in advance.
T
T
11-24-2012, 06:23 PM
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Re: Welding Shifting Fork S40 Trans
Check clearances and compare them to spec before you go fiddling with welding it. I've seen people weld/sand before, but it's generally a last resort kind of thing.
11-25-2012, 05:14 AM
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Re: Welding Shifting Fork S40 Trans
94EG8
What type of welder do you use (mig, tig)? How do you finish the part (hand file, mill, grinder)? Thanks.
T
What type of welder do you use (mig, tig)? How do you finish the part (hand file, mill, grinder)? Thanks.
T
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11-25-2012, 07:06 AM
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Re: Welding Shifting Fork S40 Trans
Not a bad option, considering the labor and aggro to open it up again if the grinding method doesn't work. I think I'd scrap the bad shift fork and replace it.
11-25-2012, 08:10 AM
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Re: Welding Shifting Fork S40 Trans
Even at $64 it's not worth it. D-series transmissions are just this side of worthless. If you have free access to a welder and about 20 minutes of free time you're better off just welding it. Also those forks aren't hardened so they don't get any softer when you weld them.
11-25-2012, 02:08 PM
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Re: Welding Shifting Fork S40 Trans
The forks are not hardened and actually relatively soft. It seems the 3/4 fork has a smaller contact area then the other forks (the others show no sign of wear and are well within in spec). The sleeve is hardened and chews into the fork. I agree that it seems risky to try the welding path because if it dosen't work there is a lot of time involved to do the job over again. I'm going to try welding the fork. If I don't like the results I will buy a new one. Thanks for all the help.
P.S. Regarding the input shaft bearing, it's way to small for it's location in the trans and is probably why it's a comman failure point.
P.S. Regarding the input shaft bearing, it's way to small for it's location in the trans and is probably why it's a comman failure point.
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