will any th400 converter work or do i need one specific for a4-th400 conversion?
04-15-2005, 03:59 PM
#1
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will any th400 converter work or do i need one specific for a4-th400 conversion? can i buy any torque converter for the th400 and have it work on my ls1 or do i have to buy one that is specifically designed to work with an ls1?
04-15-2005, 04:23 PM
#2
I used an SBC converter when I changed to a TH400. You will need a pilot spacer for the crankshaft, spacer/washers for the flexplate to converter lugs, as well as either a TCI or 1998 Flexplate (with the dual LS1 and SBC converter bolt pattern). Other companies also make LS1-TH400 specific converter at a higher cost than SBC converters.
04-15-2005, 07:42 PM
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i think i found it. i would like to double check. p/n 399753 on this site....http://www.tciauto.com/flywheels.htm
04-16-2005, 06:34 PM
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i went on summit to buy a flexplate but i noticed that the tci converters need and 168 tooth flexplate but the ones for the ls1 arent 168 tooth. i can get one for a 5.7 but for years 94 and below. That flexplate should work with the 400 right?
04-18-2005, 09:04 AM
#5
What size converter are you getting that requires a 168 tooth flexplate? LS1s and SBC both have 153 tooth flexplates, but the crankshaft bolt pattern is different from the LSx style engines and the SBC engines. I run an 8" converter on my 1998 Z28 with a 153 tooth flexplate, you should be good with either a TCI or 1998 flexplate.
04-19-2005, 10:54 AM
#7
th400
Originally Posted by z28convert
can i buy any torque converter for the th400 and have it work on my ls1 or do i have to buy one that is specifically designed to work with an ls1?
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04-19-2005, 08:30 PM
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I used a TCI LS1 flex plate w/ dual bolt patterns w/ a JW SBC TH400 converter and had the pilot lengthend
04-23-2005, 02:36 PM
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gm part numbers for the th400 to fit ls 1 crank adapter#12563532 flywheel# 12551367 bolts#12563533 l ordered these parts the 18th and will let you know if your interested
