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hey guys. have any of you used one of these as i have a trimatic block and like to bolt up a t700 box behind it.
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Yeah I have. Bad idea in my opinion. Either get a TH block, get your block converted (mid 1974 onwards only) or get the TH700 changed to trimatic pattern. The one I had kept snapping converter bolts. It was a stock trimatic pattern HJ 308 in a HJ Statesman with TH400.
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silly question. how do you get the box changed to a trimatic pattern
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They weld on alloy and weld up holes, and redrill it in a jig. Not sure who does it, but I have seen them done.
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Hi Byron,
Perhaps those HJ Statesmans had an inheret problem with their torque cobnverters as my broke and torgue converter was replaced early in its life and I replaced two cracked drive plates in a few years after that.
I got feed up and fitted another engine, later I found that the original crank had heaps more endfloat than it should, Still don't know what would cause endfloat wear in an Auto.
Mike
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Mike, these were just longer bolts with spacers between the torque converter and the flex plate the same thickness as the TH-trimatic adapter plate. Kept snapping. In my opinion the only way I could see to make it better was to have a complete ring as a spacer, with studs on it for the torque converter and the ring bolts to the flex plate. Still a dodgy solution in my books though, use the right block in the first place and problem avoided!
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if youre prepared to pull the convertor and have it altered to suit the extra clearance youve created with the adapter plate, id have no real problem with it.
another solution which i used with success, is to modify the alloy bellhousing of the transmission to suit the pattern you need.
unless you break it good, your case can be reused time after time and any competent welding/machine shop should be able to do it.
I had a t400 with 450hp stroked trimatic block holden in front of it modified in this fashion and it was fine.
id rather not redrill the block, and adapter plates with spacers can stay on the shelf too.
11.38@117mph
will go quicker
11.34@121mph
went quicker and faster, just not quick enough.
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Hi Byron,
we seem to be talking of different things, I thought you said you had a HJ Statesman with a turbo 400, which is what I have and how they came, even stock standard and low kilometres in the 1980's when owned by a previous owner mine broke the stock converter bolts.
and has broken the flex plates ever since, even with different converter and recon engine.
Mike
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No, we are on the same page, but this was a HJ Statesman with TH400 but it had a trimatic pattern 308 put in front of it at some stage with the stupid adapter. These were hence longer than stock converter bolts.
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