Anyone ran into this problem w/th350 sbc converter and LQ9 Flexplate?
#1
Anyone ran into this problem w/th350 sbc converter and LQ9 Flexplate?
I have a TH350 converter for SBC, ran it on my LT1 for a few months before I sold it and it bolted up just fine.
Now I am trying to run it behind my 2005 LQ9 with the GM adapter and the longer flexplate bolts. No dice.
If I put the adapter on the the crank and the flexplate on top the converter snout has about 1mm between it and the adapter.
If I put the adapter on top of the flexplate the snout of the converter bottoms out yet the mounting surface of the converter is no flush with the flexplate, probably over about 3/16th's of an inch gap.
From the thread about TH350 swaps it doesn't mention any of the flexplates not being able to use the adapter so I am lost.
Here are pictures of my flexplate (off my LQ9) and my adapter (from GM).
Now I am trying to run it behind my 2005 LQ9 with the GM adapter and the longer flexplate bolts. No dice.
If I put the adapter on the the crank and the flexplate on top the converter snout has about 1mm between it and the adapter.
If I put the adapter on top of the flexplate the snout of the converter bottoms out yet the mounting surface of the converter is no flush with the flexplate, probably over about 3/16th's of an inch gap.
From the thread about TH350 swaps it doesn't mention any of the flexplates not being able to use the adapter so I am lost.
Here are pictures of my flexplate (off my LQ9) and my adapter (from GM).
#4
From what I've read here (search!), the spacer goes on the crank, then the FLAT flexplate. This spaces the converter snout and the converter bolts. If you have the curved flexplate, the flexplate goes on first then the spacer. In this case, the spacer is only for the converter snout. I can verify the first instance, I'm using the flat flexplate...
#5
From what I've read here (search!), the spacer goes on the crank, then the FLAT flexplate. This spaces the converter snout and the converter bolts. If you have the curved flexplate, the flexplate goes on first then the spacer. In this case, the spacer is only for the converter snout. I can verify the first instance, I'm using the flat flexplate...
#6
Show me a pic of the back of the block where the crank flange is. If it is flush with the block you need the adapter, if not you don't.
Where the bolt holes are will line up with the aluminum cover if you need the spacer. If the flange sticks out .400" like my picture you don't need the spacer. It sounds like you don't need it.
...and I hate to be obvious but the dished style flexplate will only fit one way... Make sure the ring gear lines up with the starter or you will be trying to canoe upstream without a paddle.
Where the bolt holes are will line up with the aluminum cover if you need the spacer. If the flange sticks out .400" like my picture you don't need the spacer. It sounds like you don't need it.
...and I hate to be obvious but the dished style flexplate will only fit one way... Make sure the ring gear lines up with the starter or you will be trying to canoe upstream without a paddle.
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#9
'99 and '00 6.0L blocks don't need the spacer. The '01+ blocks do. Easy way of figuring out if it's a '99 or '00 is if it has cast iron heads, it's a '99 or '00.
#10
#12
From what I've read here (search!), the spacer goes on the crank, then the FLAT flexplate. This spaces the converter snout and the converter bolts. If you have the curved flexplate, the flexplate goes on first then the spacer. In this case, the spacer is only for the converter snout. I can verify the first instance, I'm using the flat flexplate...
The GM spacer is for use with the corresponding truck flat flexplate like in this kit:
https://ls1tech.com/forums/13720181-post27.html
#13
For the love of god do not use the "dished" plate with the spacer. I can show you what happens if you "try to make it work" like the shop did with mine. Eats up the converter, the plate, the trans pump, input shaft....
#14
That is your answer is right there.
The GM spacer is for use with the corresponding truck flat flexplate like in this kit:
https://ls1tech.com/forums/13720181-post27.html
The GM spacer is for use with the corresponding truck flat flexplate like in this kit:
https://ls1tech.com/forums/13720181-post27.html
#15
It's all about the install. When will people (yes, even shops) learn when something doesn't fit there is a problem and forcing it won't work. Sounds like you trusted the wrong people.
#16
Bringing back a thread from the dead, rather than start a new thread, I figure.
I ran into a similar issue last night with my '01 LS1 and TH400 fox swap.
I'm running a TH400 converter and a TCI flywheel kit.
Problem is, I put the adapter that fits into the end of the crank and then hold the converter up against the flex-plate and it has a gap that's probably a 1/4 inch between the foot pads on the converter and the TCI flexplate. WTF??
I called the company that made the converter, and the builder said to take an exact measurement of the gap, minus .125 and he'd machine me spacers to go between the converter foot pads and the flex-plate. But, while that could theoretically work, I can't see why this should be necessary and makes me worry I'm band-aiding it. The kit is supposed to make it a bolt together affair so wtf why am I seeing the gap?
CLIFFS: 01 LS1 camaro 5.7, TH400, TCI flexplate kit and the converter doesn't fit flush with the TCI flexplate.
I ran into a similar issue last night with my '01 LS1 and TH400 fox swap.
I'm running a TH400 converter and a TCI flywheel kit.
Problem is, I put the adapter that fits into the end of the crank and then hold the converter up against the flex-plate and it has a gap that's probably a 1/4 inch between the foot pads on the converter and the TCI flexplate. WTF??
I called the company that made the converter, and the builder said to take an exact measurement of the gap, minus .125 and he'd machine me spacers to go between the converter foot pads and the flex-plate. But, while that could theoretically work, I can't see why this should be necessary and makes me worry I'm band-aiding it. The kit is supposed to make it a bolt together affair so wtf why am I seeing the gap?
CLIFFS: 01 LS1 camaro 5.7, TH400, TCI flexplate kit and the converter doesn't fit flush with the TCI flexplate.
#20
Has anyone here had this come up in a th350/th400 onto a LS1 swap and used these aforementioned spacers??