I have built a 88 Mustang with a 5.3/4L80E/S475 swap that currently runs mid 10's. I have a Circle D Triple disc converter and am thinking about locking up the converter in second going down the track to help with converter slippage. The trans is stock rebuild with a HD-2 kit. Should I or should I not lock this up in second?

 

I've been wondering the same thing. I was going to engage the lock up as soon as I can, which seems to be 2nd. Launch on the nitrous and as soon as I can engage the lock up, do it. See if it picks up.

 

Anyone?

 

I wouldn't do it with a stock input shaft.

 

Well, I'll be finding out how well a stocker will hold. Seen them take way more power than I'm throwing in a heavier chassis.

 

In for info. I'd like to lock my stocker aswell

 

been curious as well. i have a tci 300m input and cant really find any info on this... dont wanna test it lol

would like to find some conclusive info on what type of rpm differential is safe to lock up with as well. is 1000rpm safe, or 1500, or 2000. seems to me the more rpm differential the harder is would be on everything.

 

The stock 6.0L Express vans upshift 2-3 WOT with a locked converter, couldn't be too bad.

 

We aren't exactly talking a ton of power there, lol.