Author Topic: Synchro source?  (Read 595 times)

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Lewis Hein

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Synchro source?
« on: Nov 28, 2017, 07:47:24 PM »
Hey all,

I'm wondering if there is a source for synchros for a G52? My second gear synchro has apparently decided to lose a tooth or something.

I'm debating rebuild vs. replace, but I can't even find synchros for sale, other than sketchy eBay things. Anyone know where Marlin gets his? Does he have a source of new ones that might be accessible to mere mortals?

Thanks.

Gnarly4X

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Re: Synchro source?
« Reply #1 on: Nov 29, 2017, 02:56:37 AM »
Hey Lewis,

It has been awhile since I had a Toyota 5-speed transmission rebuilt.  At that time my transmission shop said they only use Toyota factory synchro rings.  The aftermarket non-Toyota synchros were manufactured with an alloy material that would not perform as designed and engineered by Toyota.  Since synchros work basically as a friction brake, the coefficient of friction (and alloy material) apparently is a critical factor in their proper operation and function. The synchros, as with other transmission components, and transmission gear oil, are critical to proper operation.  There are many design calculations required to make them work correctly.

I would trust Marlin’s opinion on anything Toyota transmission or t-case.

Gnarls.
« Last Edit: Nov 29, 2017, 09:49:53 AM by Gnarly4X »
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gnob

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Re: Synchro source?
« Reply #2 on: Nov 29, 2017, 07:03:32 AM »
Buy at stealer.
hold this. . .

:)bestgen4runner

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Re: Synchro source?
« Reply #3 on: Nov 30, 2017, 10:54:32 AM »
Hey Lewis,

It has been awhile since I had a Toyota 5-speed transmission rebuilt.  At that time my transmission shop said they only use Toyota factory synchro rings.  The aftermarket non-Toyota synchros were manufactured with an alloy material that would not perform as designed and engineered by Toyota.  Since synchros work basically as a friction brake, the coefficient of friction (and alloy material) apparently is a critical factor in their proper operation and function. The synchros, as with other transmission components, and transmission gear oil, are critical to proper operation.  There are many design calculations required to make them work correctly.

I would trust Marlin’s opinion on anything Toyota transmission or t-case.

Gnarls.
This is correct information
I have rebuilt a few manual trans in My day. You will be sad if you go with anything other than Toyota.
also there is a process to seat the syncro prior to final assemblie. You will want t o look into this. I skipped it on My last trans because it was mine and I figured what the heck. Mistake!
It has taken quite a while for the one two shift to smooth out and it is because on not seating the synco like I should have.
I am 1/5th of Perfect Fit
SqWADoosh [04:19 PM]: *sigh* I guess Chris is right and I just need to wait until I'm in a place where I have a tow rig and trailer before I get this caliber of truck
Mudder [08:28 PM]:   not try to be a jerk, but are you serious bestgen?
Prismo [06:11 PM]:   Done, time to relax or as Bestgen says....FREEDOM!
HogCanyonHopper [06:54 PM]:   I like my little rod. it gets the job done
H8PVMNT [03:30 PM]: I can go both ways.

Lewis Hein [OP]

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Re: Synchro source?
« Reply #4 on: Nov 30, 2017, 11:08:32 AM »
I'm really happy to use a Toyota synchro as recommended... I just can't find one! Where are they to be found?

:)bestgen4runner

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Re: Synchro source?
« Reply #5 on: Nov 30, 2017, 11:40:46 AM »
dealer
I am 1/5th of Perfect Fit
SqWADoosh [04:19 PM]: *sigh* I guess Chris is right and I just need to wait until I'm in a place where I have a tow rig and trailer before I get this caliber of truck
Mudder [08:28 PM]:   not try to be a jerk, but are you serious bestgen?
Prismo [06:11 PM]:   Done, time to relax or as Bestgen says....FREEDOM!
HogCanyonHopper [06:54 PM]:   I like my little rod. it gets the job done
H8PVMNT [03:30 PM]: I can go both ways.

Toybrota

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Re: Synchro source?
« Reply #6 on: Nov 30, 2017, 06:47:39 PM »
I've got a good G52 core, ate the bearing for the Secondary shaft, but the syncros are still good.
PM me and we can work something out.

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