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03-25-2018, 11:00 PM | #1 |
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Saginaw 3 speed speedometer gear removal
So I need some help and I am sure the gurus on here will have an answer. I have a 3 speed saginaw transmission in my 68 c10. This was my grandfathers truck, and then my uncles. To the best of my knowledge it has never been rebuilt. I pulled it to rebuild the motor and decided to take it apart and replace the bearings. I have never worked on a transmission before but it didn't look overly difficult. I was following the directions in the factory overhaul manual and everything was going fine. Messy, but fine. I got it this far:
Now I need to remove the rear bearing to replace it. According to the manual there is supposed to be a clip that holds the speedometer drive gear on the shaft. This needs to be replaced in order to slide the bearing off. Only problem is, there is no clip that I can see. The gear appears to be made of metal. I found a video and some pictures online (this site included) that show this gear to be plastic and held in place by a clip. How do I get this thing off? Or back on for that matter? I am assuming it is press fit. Below is a picture of the gear. Thanks, |
03-26-2018, 09:01 AM | #2 |
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Re: Saginaw 3 speed speedometer gear removal
These type of metal speedo gears are pressed on and pressed off... using a press.
You maybe able to get it off using a punch but most likely you may damage the gear... |
03-26-2018, 09:07 AM | #3 |
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Re: Saginaw 3 speed speedometer gear removal
Thanks. That was my guess. I will get the rest of it apart and take it to a transmission shop to have it pressed off. Might as well have them press off the bearing as well. Thanks!
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03-26-2018, 06:23 PM | #4 |
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Re: Saginaw 3 speed speedometer gear removal
As far as the rear bearing, I believe all you have to do is remove the snap ring and the bearing should come off.
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03-26-2018, 08:10 PM | #5 |
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Re: Saginaw 3 speed speedometer gear removal
Yes, but the bearing doesn't fit over the speedometer gear.
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03-27-2018, 07:17 AM | #6 |
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Re: Saginaw 3 speed speedometer gear removal
I thought I already addressed you have to press the speedo gear off....once you press the speedo gear off, than you remove the snap ring with a set of snap ring pliers, remove rear bearing which does not need to be "pressed" off or back on....
"the inside diameter of the bearing is smaller than the outside of the steel speedo gear...." Since you have it a part, replace the synro rings/springs/detents....check all gears where the synro hub slides onto the gear and make sure they are not worn out..... |
03-27-2018, 10:53 AM | #7 |
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Re: Saginaw 3 speed speedometer gear removal
Sorry, I read your response wrong. I understand. Actually Have it in my car trunk now. Going to take it to a place near my work at lunch to get it pressed off. I will then take it home and replace the brass syncros, keys, springs etc. Then of course have the bearing and gear pressed back on later this week. I am also having them press in a new bushing and seal in the tail shaft.
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03-27-2018, 11:07 AM | #8 |
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Re: Saginaw 3 speed speedometer gear removal
Looks like you're doing fine with the trans rebuild. Sometimes you can rent a deep reach 3-jaw puller and get them off (the speedo gear) and then use an angle grinder to cut the bearing. If you were to cut the bearing off just cut the outer cage, score the inner race, then knock it off with a cold chisel.
Seems like you're ahead of the game by getting it pressed off. Are you planning to replace that gear with plastic? |
03-27-2018, 11:49 AM | #9 | |
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Quote:
As far as cutting the bearing not sure why anyone would cut the bearing off when he is going to press off the speedo gear ? If the bearing is hard to slide off the shaft than he would press the bearing off just like the speedo gear. 😀 Posted via Mobile Device Last edited by YoungPup1977; 03-27-2018 at 11:55 AM. |
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03-27-2018, 12:01 PM | #10 |
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Re: Saginaw 3 speed speedometer gear removal
I just rebuilt mine......take a brass hammer or a chunk of brass and tap it off and back on. Dint forget which way it goes. Use a little heat if you have to..
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03-27-2018, 12:02 PM | #11 | |
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Re: Saginaw 3 speed speedometer gear removal
Quote:
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03-27-2018, 12:14 PM | #12 | |
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Quote:
Same mindset can be used to remove the steel speedo gear than wonder how to make the plastic gear stay on the output shaft. If you take a metal gear off without damaging it, why would you not put it back on.....Hmmmm....can be done...with the proper tools....cutting bearings is not common practice here in my world...most speedo's of today actually are not gear driven.... Posted via Mobile Device Last edited by YoungPup1977; 04-02-2018 at 10:04 PM. |
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03-27-2018, 12:22 PM | #13 |
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Re: Saginaw 3 speed speedometer gear removal
You're right. Since you do this for a living, no one else could possibly offer an alternative suggestion. But while I have your expert attention I have a question you might be able to answer. How can I attach a mechanical speedometer drive to a Chevy NV4500 (93, 2wd) trans?
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03-27-2018, 12:55 PM | #14 | |
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Re: Saginaw 3 speed speedometer gear removal
Quote:
Maybe you need to buy the dodge version of the new venture 4500 As far as your question, start a new thread instead of high jacking this one...THANKS !!!! Last edited by YoungPup1977; 03-27-2018 at 01:17 PM. |
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03-27-2018, 01:56 PM | #15 | |
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Re: Saginaw 3 speed speedometer gear removal
Quote:
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03-27-2018, 06:23 PM | #16 |
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Re: Saginaw 3 speed speedometer gear removal
??? all the guy wants to know is how to remove the metal speedo gear...LOL!!!!
Last edited by YoungPup1977; 03-31-2018 at 08:14 AM. |
03-27-2018, 07:33 PM | #17 |
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Re: Saginaw 3 speed speedometer gear removal
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04-12-2018, 11:49 PM | #18 |
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Re: Saginaw 3 speed speedometer gear removal
So I found a shop that was willing to press it off for me. Gave them the bearing and new snap rings as well so they could press it back together. They wouldn't let me pay them for the work. I tried, but they refused. I know where I am taking my more modern car if it ever has transmission issues that's for sure.
Next up painting the case and then reassembly. |
04-13-2018, 09:45 AM | #19 |
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Re: Saginaw 3 speed speedometer gear removal
Glad it worked out for you. Using the correct process saves time, is safer and you didn’t damage other parts of the transmission.
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04-13-2018, 10:13 AM | #20 | |
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Re: Saginaw 3 speed speedometer gear removal
Quote:
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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05-20-2018, 12:28 AM | #21 |
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Re: Saginaw 3 speed speedometer gear removal
Just wanted to update everyone who answered with some help. I finally got the whole transmission back together. The hardest part of the job was what I asked about above, but that is really just because I don't own a press. Thanks to everyone that helped out.
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05-20-2018, 09:31 AM | #22 |
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Re: Saginaw 3 speed speedometer gear removal
Great job.. Looks good. I've only worked on one and it was many years ago. It had a bad synchronizing asm. These transmissions if not drag raced, will last for a very long time.
Keeps us posted on how it works after installation.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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