I have a 440 cast crank motor with a with a 727 auto trans. I installed a Hughes HUP24-25 HD converter along with a B and M 10237 flex plate to keep converter balanced. The bolt heads I used to secure converter are factory, .250" thick .500" long, and only give .008 to .011" clearance to engine block, ( crank thrust bearing play). Seems a little close!!
Is this acceptable or does someone make a shim to go between crank and flex plate to push converter rearward or thin headed bolts.
Rick
torque converter bolt clearance
- pwadventurer
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Re: torque converter bolt clearance
I'm not sure of the correct answer but I do know the clearance has always been close. Loose bolts hit the block and it shaves the heads off or worse. When your first putting them in and rotating the assembly you have to get them in completely or you cant rotate to the next one.
1971 Dodge D100
So what's wrong with setting beneath a single pull string incandescent light bulb writing angry letters?
So what's wrong with setting beneath a single pull string incandescent light bulb writing angry letters?
- marklein
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Re: torque converter bolt clearance
How far from the flex plate is the converter before bolting it up? If you push the converter back toward the trans with no bolts in it, measure that clearance. You can buy a shim for a standard flywheel that is .080" thick. That will give adequate clearance as long as you have good clearance between the flex plate and converter. They have always been relatively tight.
- pwadventurer
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Re: torque converter bolt clearance
With the converter pushed back, the clearance is 2/32" (.0625"). I probably need that to protect pump. I was looking at the ARP bolts, but they didn't spec thickness. I guess the problem stems from the new converter that uses 7/16-20 bolts, same as crank to plate bolts, verses the 5/16" bolt that are with factory TC. Maybe grinding the block where the bolt heads circle around a few thousand" will be ok, or maybe just take a few off the bolt heads would be easier.
Rick
Rick
- dodgeboykim
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Re: torque converter bolt clearance
I would polish a little block clearance.
My truck is younger than me.
66 W100. 70 D 500 , 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 LB Propane 360 auto 09 Yammy Rhino 700.
66 W100. 70 D 500 , 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 LB Propane 360 auto 09 Yammy Rhino 700.
- pwadventurer
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Re: torque converter bolt clearance
OK so I went with shaving .050" off the head of bolt because the transmission is in place and the rear cam bearing forging would have to be trimmed as well. It sits flush with bell. I have .060" clearance and feel better now. The 7/16" bolt heads are 3/4", so there's still a lot of meat left.
Thanks to all for your help!! Now I am ready to fire it up.
Thanks to all for your help!! Now I am ready to fire it up.