Alright so lets start with some background engine is 02(what i was told) 5.3 lm7 trans is a 4l60e believed to be a 00 2wd truck trans and converter is from an fbody heres my problem motor can be turned by socket/ratchet smoothly can also turn trans with the converter installed once i bolt them up i cant turn the assembly I know it shouldnt be easy to turn but i aint no b**** ive pulled it out three times now last time noticed that the flywheel was bent, bought a new one, checked vanes on the pump if i move one so does the other, also held converter up the the flywheel snout on the converter fits in the crank just fine carefully rotated the converter against the new flywheel it doesnt rub what else could be the issue is a stock converter from a fbody to thick? bellhousing need changed? Im at a loss and need help

 

Are you saying that with the trans bolted to the back of the engine and the torque converter unbolted you can turn the engine and torque converter, but when the torque converter is bolted to the flywheel you can’t turn the engine? How did you bolt the torque converter up if the engine won’t turn once the torque converter is bolted up?

 

The head of your torque converter bolts could be hitting the block.

 

called brian at circled sent him some pics at his request he noticed it right away shaft is a 298mm so new issue what do I need to go to a 300mm shaft

 

A good question might be is it even possible to change a 298mm 4l60e into a 300mm 4l60e without spending a lot of money. I imagine there's a slew of potential compatibility issues, including a new input drum for the bigger shaft, and a new pump? Would the output shaft need to be changed, other hard parts? How would it affect the driveshaft, would the old case work, etc?

We need some builders to give their opinions.

 

Converting a 298mm trans (which makes it almost certainly a '97 or earlier) into a 300mm would require an extensive rebuild and a bunch of different parts. Not a good idea.
If the trans is a '96 or a '97 you need a spacer and longer crank bolts, and a 298 converter, as detailed in this thread:

https://ls1tech.com/forums/automatic...s-spacers.html

If the 4L60E is a '94 or '95, forget it, as the electrics are incompatible.

I suggest selling the trans and purchasing a 300mm from a '98 - '07 LS powered car or 2WD truck.

 

It's a 00 v6 truck trans that I just had rebuilt selling really isn't an option so new shaft/drum/pump only plus side my builder only charged me $200 labor for the rebuild so this shouldn't cost much besides the parts

 

Plus guy I had rebuild it has a bellhousing for a v8 hes been doing this for 30 years so he's got a pretty nice collection of 4l60e parts

 

And heres my trans

 

Since it was recently rebuilt and is a 298mm trans, why not just use an LT-style converter and bolt it up with the necessary GM spacer?

 

That would seem the easiest and most coast effective way to go.

 

Yea... did a lot of thinking last night i dont have time to swap everything got a converter and bout to order the spacer