Glad it's running good for you, do you think the drivelines off because you changed the trans crossmember?

 

I had this issue before the trans, last time at the track when i blew the performabuilt, it had a vibration at 80-90mph. I just havent gone WOT since that day, well until today. So i am gonna fix the pinion angle, probably swap out the leaf spring bushings, then if it is still there replace the gears.

 

I still got those shims somewhere if you need them.

 

No you dont. You allready gave them to me

 

I get forgetful in my old age.

 

actually they were mine to begin with, then i gave them to you, then you gave them back, and i installed them today

 

the stall speed is probably perfect for what you trying to achieve, what im getting at is the pump size, do you tow or something ? 3c is being a very tight converter though it'll flash close to 3600 which is great ( hopefully ). then again im not sure if they ( circle-d ) can go with a 4c in a 3600!! also im not up on stalls lol i let chris do the explaining i just tell him what i want lol


either way should be a very nice street combo !!

 

The 3c is the smallest diameter one they have for a 4L80 it is the 245mm one, it is not the bigger one.. You should not tow with the 3c it is tooo small. the 4c is a 3600-3800rpm same diameter

Pro Stage I 245mm Truck Torque Converters For GM 4L80 4L80E

 

Ok, now i remember you building that trans.. sucks about your vibration though, hope you get it figured out and keep us posted on what it was.

 

So how are you liking this new combo and how did the relay mod work out? Care to share the details of how you wired it all up and what was needed for the tuning side of things?