2000 LQ4 to TH350

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Dec 5, 2016 | 07:12 PM

hpfiend

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Staging Lane

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From: Columbus, Ohio

2000 LQ4 to TH350

Hey all-

I have done some research and apparently with this engine and the stock flexplate I will not need a spacer or adapter.

I have read I may need to elongate a few holes in the flexplate which I am not crazy about the Idea of slop?

The 4l80 converter was 6 bolts and the th350 converter looks a lot smaller and only 3 bolts?

Dec 6, 2016 | 09:51 AM

hpfiend

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Staging Lane

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From: Columbus, Ohio

Anyone?

Dec 6, 2016 | 10:02 AM

billymgb1000

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From: harrisville R.I

I drilled the holes bigger in the original flex plate and bolted a turbo 350 to her and I have had no problems for 4 years. I even put a stall converter in 2 yrs ago and still no issues. instead of elongating the holes I put in on my drill press and just drilled the holes bigger and kept testing it against the converter till she fit. Good luck brother

Dec 6, 2016 | 10:40 AM

rworcester

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From: Florida

Yep I slotted the flex plate holes on my flexplate while it was seated in a TH350 torque converter so I had a good true center. No spacer needed for the longer crankshaft.

Dec 8, 2016 | 02:04 PM

hpfiend

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Staging Lane

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Quote:

Originally Posted by rworcester

Yep I slotted the flex plate holes on my flexplate while it was seated in a TH350 torque converter so I had a good true center. No spacer needed for the longer crankshaft.

I was wondering about this- is there a depression for the tabs or how did you "seat" it to make sure it was centered? Did you guys use a carbide bit in a dremel tool to slot the holes?

Dec 9, 2016 | 01:10 PM

74novacustom

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I used a 5.3 Flex with a Hughes Spacer and elongated the holes with a drill bit. all on my 6.0.

Dec 9, 2016 | 03:38 PM

hpfiend

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Staging Lane

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From: Columbus, Ohio

Quote:

Originally Posted by 74novacustom

I used a 5.3 Flex with a Hughes Spacer and elongated the holes with a drill bit. all on my 6.0.

Thanks! How did you center it?

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Dec 10, 2016 | 01:46 PM

hpfiend

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Staging Lane

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From: Columbus, Ohio

Quote:

Originally Posted by aod92

I have a 99 lq4 bolted up to a turbo 350 with no spacer.

How did you make sure the torque converter was centered on the flex plate when you drilled/slotted the new holes?

Dec 12, 2016 | 08:35 AM

#10

rworcester

Staging Lane

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From: Florida

Its a very snug fit on the torque converter for the LQ4 flexplate. I Believe it has 3 or 4 tabs that slip onto the torque converter snout. I slotted my holes with it on the torque converter sitting on a table.