General Category > Quadrajet Carb Talk and Tips

th350 rebuild kit?

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Cliff Ruggles:
Like the TH400 the "weak" spot in the TH350 is the intermediate sprag.  I prefer to install an aftermarket drum with the 36 element sprag upgrade for big power applications. 

I've tried a few times to skimp by just using the hardened outer race and stock type roller clutch and they just don't last behind high torque engines in racing applications.

I also like the bolt-in case saver set-up for the 4L60 with longer rollers. Most TH350 cases are worn some at the center support anyhow so that upgrade is a win-win all the way around.......

tayto:
this style cliff?

Cliff Ruggles:
Yes, that's what I use in them here....

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