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Author Topic:   Distance between Torque COnvertor & Flexplate
Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted July 13, 2005 03:32 PM  
It seems that I’ve got an excessive gap between the flex-plate and the torque converters tabs.

A 350, running a powerglide, with an engine plate. When I pull the torque converter towards the engine, the snout of the torque converter buries itself in the rear of the crank (about 1/8” into the crank plate) and the converter probably moves about a ¼” away from the tranny seal. So far, so good right?

My problem is I’ve got about a 3/8” gap between the flexplate and the torque converter tabs. Way more than the “1 washer” gap I’ve used in the past on other cars.

Any ideas?


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[This message has been edited by Limited Mod 57 (edited July 13, 2005).]

[This message has been edited by Limited Mod 57 (edited July 13, 2005).]

[This message has been edited by Limited Mod 57 (edited July 13, 2005).]

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 13, 2005 08:22 PM  
BEGIN WITH THE CONVERTER PUSHED BACK INTO THE TRANSMISSION. PULL FORWARD TOWARDS THE ENGINE 1/8". IF THE LUGS DO NOT CONTACT THE FLEXPLATE, USE A DRILL BIT TO MEASURE THE DISTANCE BETWEEN THE CONVERTER LUGS AND THE FLEXPLATE. BUY OR FABRICATE SPACERS THAT THICKNESS. THE SPACERS CAN BE CONSTRUCTED OF STEEL OR ALUMINUM.YOU ALSO NEED TO CHECK TO BE SURE THAT THE CENTER QUILL OF THE CONVERTER IS IN THE END OF THE CRANKSHAFT.
IF YOU HAVE TROUBLE WITH THE SPACERS, I DO MAKE A MOTOR PLATE SPACER KIT THAT I SELL, BUT YOU SHOULD BE ABLE TO FAB WHAT YOU NEED.

Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted July 15, 2005 09:24 AM  
Thank guys.

I did some measuring and here's what I've got:
1) Converter pushed back into tranny. Distance between flexplate and torque converter (TC) lugs: 0.510
2) Converter pushed towards engine, with converter snout(?) buried into crankshaft plate. Distance between flexplate and TC lugs: 0.300
3) Difference: 0.200 or a little less than a 1/4"

So for "spacers", I used a 3/8" (I believe that was the size) nut.

**NOTE: All bolts, washers, and nuts used for this are Grade 8***

Not the most sophisticated, but this should work, correct?

I was initially concerned that using the nut would not provide enough surface area/contact area between the flexplate and the TC lugs. But I reasoned that that's probably not a concern. In other cars I filled the void with washers. And the surface area supplied by a washer is not that much greater than the surface area supplied by a nut.

Plus, just how much load/stress is placed in this area? It would seem most of the load would be a shear load on the bolts between the flexplate and the TC.

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[This message has been edited by Limited Mod 57 (edited July 15, 2005).]

[This message has been edited by Limited Mod 57 (edited July 17, 2005).]

sc1 racing
Dirt Freak

Total posts: 419
posted July 15, 2005 06:09 PM  
best thing you can do is get rid of mid plate. spacing it out will put all the load on the spacers, and bolts..

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