85LSXTRUCK

iTrader: (2)

Made the mistake of bolting the motor to the tranny without checking bolt circle diameter, come to find out the 4l80e converter and flexplate I bought are about 1/8 to 3/16 off. The converter has a smaller bolt circle pattern. Can i machine the holes to fit or should i find the correct flexplate? I didnt know there was different flexplate bolt diameters. Trying to get this LS3 swapped, need some suggestions ?

brandon6.0

iTrader: (32)

Sounds like u have a 80e converter built on a 60e pattern. What flexplate are u running? Do u have proper spacing between converter and plate? If so yea u can open up holes a lil bigger for bolts. I do this all the time with th350/400 swaps with a 60e plate

85LSXTRUCK

iTrader: (2)

Spacing looks fine, but bolt circle is off. I know someone else had to run into this problem. I assumed it would fit but you know what they say about assuming.

LLLosingit

iTrader: (4)

First, Why do you have two different posts asking the same question? And second, Did you read my reply to your other post?
Call Yank for confirmation, We had to use a 4l60E dished flexplate with a yank 4l80e converter.

85LSXTRUCK

iTrader: (2)

I read most of the tranny threads and asked if anyone knows where to find the correct flexplate is all I done. I wanted to get parts ordered today and was hoping someone would help me besides telling me to call for help. Yank surely aint open till monday. My bad, I should of reworded my first post. I was really wondering why in this 100 degree day someone wouldnt be inside like me . I will call yank if I dont get an answer today. I hate waiting for sometimes hours for a reply from yank if I can get help on this great site. I do appreciate your input on this matter though.

85LSXTRUCK

iTrader: (2)

Pulled motor this morning. I am going to bring the flexplate to work and machine it to fit. Its nice when you have access to mills and lathes as I am tool maker.