What flywheel to use?
 

I am getting ready to put a 2002 6.0L LQ9 into my '68 C10. I was going to use the 4L80e transmission that I purchased with it, but a friend of mine has recently given me a TH 400 that his dad built (Dad builds racing transmissions) and he has no use for.

Question is: Will the flex plate from the 6.0 work bolting up the TH 400 torque converter and do the bell housing and block mounting holes match?

I have read a few things about adapters and special bolts, but nothing concise.

Re: What flywheel to use?
 

I cant help much...running a stick shift, behind my 5.3? You might shoot Clinebarger a pm....bet he can help, he is the trans 'guru"...Longhorn

Re: What flywheel to use?
 

Id wether have the 4l80e over the 400 the 4l80 is as bullet proof as the 400 but has over drive no sure on flexpkate

Re: What flywheel to use?
 

Guessing your LQ9 came out of a Denali or Escalade Platform and was hooked to a 4l60/65. So next question is the flexplate on your LQ9 flat or dished?

Also chances are if it came with a 4l80 attached then its more than likely an LQ4 and in that case you the th400 will bolt right up

Re: What flywheel to use?
 

i recently had the same question about a 700r4, what i was told is that the flexplate will work-but the holes in it need to be elongated by about half a hole. also you need to use a spacer between the flexplate and crank that gm makes and is available through summit racing with bolts.

Re: What flywheel to use?
 

I will have to check on the flex plate. It is wrapped up at my dads shop right now. It did come out of an Escalade and I assumed that it was a 4l80, it was sold to me as one and I resold it as one. I ran the numbers from the motor and it is definitely a LQ9.

Re: What flywheel to use?
 

I saw a post that talked about the spacer and bolts so I have the part numbers for both if I need them. Thanks,