LS1 - 700r4 torque converter HELP.
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LS1 - 700r4 torque converter HELP. hello i am putting a 2000 ls1 in a 72 vista cruiser and i am going to bolt it up to a 700 r4. i purchases a flywheel that is supposed to be good for the 700r4 and similar trannys. (700 is out of a 88 iroc camaro) the problem i am running into though is that the torque converter bolt hole radius is smaller than the fly wheel holes so id have to drill new holes to bolt it up
my dad went to the local tranny/torque converter shop and asked him if he had a different torque converter and he said there is none that dimensions that will work. so my question is does anyone know what the deal is? and at my work there is a machinist that said he could drill the holes, is that a bad idea? thanks.
my dad went to the local tranny/torque converter shop and asked him if he had a different torque converter and he said there is none that dimensions that will work. so my question is does anyone know what the deal is? and at my work there is a machinist that said he could drill the holes, is that a bad idea? thanks. 
If your staying EFI the TV linkage is available from bowtie overdrives.
You can use the hughes adapter for the center pilot of the torque converter. OR you could use the factory GM 4L80E adapter flywheel and bolts.
You could use a SBC 168 tooth flywheel as a pilot to line up the TC holes to a closest match, then oval the LS1 flywheel to bolt correctly.
You can use the hughes adapter for the center pilot of the torque converter. OR you could use the factory GM 4L80E adapter flywheel and bolts.
You could use a SBC 168 tooth flywheel as a pilot to line up the TC holes to a closest match, then oval the LS1 flywheel to bolt correctly.
The holes need to be elongated to match. You'll still need the crank spacer and longer bolts. Search this section for flexplate and crank spacer then read up!
hello i am putting a 2000 ls1 in a 72 vista cruiser and i am going to bolt it up to a 700 r4. i purchases a flywheel that is supposed to be good for the 700r4 and similar trannys. (700 is out of a 88 iroc camaro) the problem i am running into though is that the torque converter bolt hole radius is smaller than the fly wheel holes so id have to drill new holes to bolt it up my dad went to the local tranny/torque converter shop and asked him if he had a different torque converter and he said there is none that dimensions that will work. so my question is does anyone know what the deal is? and at my work there is a machinist that said he could drill the holes, is that a bad idea? thanks.
my dad went to the local tranny/torque converter shop and asked him if he had a different torque converter and he said there is none that dimensions that will work. so my question is does anyone know what the deal is? and at my work there is a machinist that said he could drill the holes, is that a bad idea? thanks.
Come on man. At least know something about what you are talking about before you discourage others.
You can use the TH700 with your LS1 motor no problem. You just have to either use the Hughes spacer between a 4l60e flexplate and the torque converter or you can use a flexplate spacer assembly from a vehicle equipped with a 4l80e transmission which typically goes in a truck. This "truck" flexplate has a GM part number of 12621399 and it comes with the correct spacer and bolts for about $50. When using this flexplate, you will have to elongate the torque converter holes about 1/8 - 1/4" with a die grinder to make it all work. Easy as pie.
You can use the TH700 with your LS1 motor no problem. You just have to either use the Hughes spacer between a 4l60e flexplate and the torque converter or you can use a flexplate spacer assembly from a vehicle equipped with a 4l80e transmission which typically goes in a truck. This "truck" flexplate has a GM part number of 12621399 and it comes with the correct spacer and bolts for about $50. When using this flexplate, you will have to elongate the torque converter holes about 1/8 - 1/4" with a die grinder to make it all work. Easy as pie.
