Zf5 syncros

[usramc]

How do you change the syncro's out? Where do you get them?

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[Patrick Feeley]

Hopefully never! They are not cheap, but you could always try a local shop to see if they can get them for you. You will need a bunch of pullers and such (and maybe a press) to do it. When mine were toast (due to multiple clutch slave failures) I just got a rebuilt tranny. Cheers!

[Diesel_brad]

You can talk to Dan from Midwest Trans. IIRC they were $250 for the syncros, seals and bearings. You need a press to slide the lock collars on and off. Or torch cut them off and drive them back on with a hammer and punch.

I personally have never had one apart myself, but I have seen about 5 of them getting rebuilt

[rolsmojave3]

You have to pull the trans and rebuild it.
I've done 3 of them. If you don't have bearing splitters, pullers and press you'll not have fun. I also have a small toaster oven to heat all the parts up in for easy assembly, no pressing back together. On top of this if you replace bearings you'll have to set their preload. I buy my parts from Zumbrota Bearing and Gear. ZBAG - Zumbrota Bearing & Gear - Home

[madpogue]

How have you determined that it's the synchros?

[usramc]

I just assumed since it's only 3rd gear, and I can ease it in or rev up my truck and get it in with no grinding but if I slam it home it will grind.