I have a 67 chev c10 and the starter was slipping off the 168tooth flywheel ..so I bought a new starter, had a pro company install it... But then it started slipping and grinding the same day... So I bought yet another starter.a hydromatic power starter and its not catching correctly. So what else can be my problem to get it right...sometime it grinds , sometimes it spins...on both starters and the new flywheel. I have two different starters and both are doing the same thing....
Please help!
are you sure you bought a 168 tooth starter? from my understanding there's two different starters, with two different bolt patterns, to fit two different diameter flywheels. or maybe you have a 153 tooth flywheel and don't realize it.
edit: on second thought the latter seems more likely, looking it up the 153 tooth is 10.4" dia where the 168 is 11". so your radius difference between the two is 3/10 inch. meaning if you have a 168 starter on a 153 flexplate you might be able to get it to start but itd only be turning it by the tips of the teeth?
Hopefully someone else will come along with a little more knowledge but that would be what i checked first.
You cant mix either of the two, 168 or 153.
The mini starters that are quite popular have two sets of bolt holes that will move the starter in or out for which ever flywheel you have.
As far as your slipping and grinding issue.
Are you using the knurled shank starter bolts to mount your starter? If not, there is a good chance your starter is just not in the right spot to mesh correctly with the flywheel. The Knurled shank forces the starter to align very closely with the bolt holes in the block.
After looking at your picture I see it is not a mini. You still need the knurled shank bolts with a factory style starter.
One last thought, your flywheel on tight?
Best of success.
Hey this is a cool website and I want to thank you all for all of your input I am a Chevy lover and to reply to all of you guys Birdman the actually size of a flywheel for a turbo 350 transmission is a 168 tooth I had recently purchased a turbo starter and I looked at the diameter of a dove my and flywheel and the 168 tooth diameter is actually 12. 13 inches in diameter and the 158 to fly will is 10 inches in diameter I have a starter for both both are doing the same exact thing and both starters are new IV shimmed both starters all the way up to 5 shims and down every starter still good the issue is now with the more expensive starter the turbo hydroautomatic is not catching now it did the very first time turned it off tried to recheck on both starters and then it started to either grind or slipping and I assumed both of them and its still not working right can it be the tightness of the whole transmission system, u know the Bell and flywheel and just the tightness of the whole transmission part? I had to really pull and crank on the flywheel to insert the other bolts... Is it a possibility of just the whole turbo shaft is too tight as a unit and making the starter burn out?
BWilliams thx for your help. Everything is 168 compatible. The one bolt extension from the block is fine (straight) the other is a removable bolt. I don't have any shims because it seized (grinded). On the other starter the garage I sent it to shimmed it with one shom...started and yet the same day it started slipping. So I got a new flywheel and even a new starter . but both starters ,shimmed or not (I've checked ) either slip or grind.
Ok, I went back and looked at it again, i misread the chart i was looking at, I was reading the clutch diameters on flywheels. The correct numbers are 12 3/4" for the 153 and 14" for the 168 for flexplates. I am a little confused here, you keep using flywheel and flexplate interchangeably but im going to assume we are talking about an automatic since you mentioned a TH350.
My understanding is that you don't match a flex plate to a transmission you match it to the engine. This is because some engines are internally balanced and some externally and the 168 tooth factory only came on 400CI and big blocks, does your C10 have a big block or 400? Although I'm not sure they ever used either of those with a TH350, pretty sure they all got TH400s.
Also, the 350/TH350 combo in my 78' firebird had a 153 behind it when I went to swap for a 700r4 so I know you can use a 153 on a TH350.
You said you had to "pull and crank on the flywheel to insert the other bolts". Are you talking about the bellhousing bolts? if so you may not have gotten the torque converter seated all the way and are binding it. I've done it twice myself trying to put in a transmission at an awkward angle. If so that would definitely cause the engine to not want to turn over. In my case it kept me from even starting the car either time but it may be possible to have enough slack in the chain to spin it just with extra load.
One more thing, could you clarify this sentence in your previous reply for me.
"I looked at the diameter of a dove my and flywheel and the 168 tooth diameter is actually 12. 13 inches in diameter and the 158 to fly will is 10 inches in diameter..."
The way I'm interpreting this sentence is that you measured your flexplate to be 12-13" in diameter. which sounds like a 153 tooth flexplate to me.
You claim your starters have had shims, but did you read what I said? I said to shim the OUTSIDE BOLT ONLY. Do not just put the shims equally on the starter. Cut the shims in half and ONLY shim the outboard bolt. This will bring the gears in a bit closer together.
X2! Just had this problem. Installed the starter brace and no more problem. Jegs or Summit. Cheap.
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