i haven't had a chance to hit a 1/4 mile strip yet, i did do 9.04 in the 1/8th but i still had a problem shifting into 4th on that run. i have come to the conclusion that stick shifts and dual disk clutchs are not really a good drag strip set up. but heck neithier is a 4x4 dually ex cab.

 

Well last time I went to the track I ran like a 16.1 and that was not using the lock up switch and breaking the tires loose off the line. I think with the switch locked and getting a good launch(which I have gotten very good at now) I should be in the mid 15s.

 

ya my first run is going to b oct 29 and was wondering what i could run also

 

You won't listen, will ya?

 

This is moreorless for my own personal interest... but didn't someone say that hitting it back into 2wheel drive when going down the track doesn't kick it out of 4wd... the vehicle has to be decelerating? Or is this just referring to the autos? It will kick out if you're fast enough between shifts on a 5 or 6 speed?

 

When you manually remove the transfer case out of 4X4, it is out, and not pulling at all. The front axle will remain engaged, but not in a operational mode. As soon as the "tension" is taken off the front end, it will be released, and all is back to normal. The internals of the transfer case, says when you push the lever and take it out, it's out.

Darren has started to kick his out of 4 wheel drive at 1/8 track and you can see the truck shift its stance when all power is shifted to the rear wheels. He launches is 4 wheel and finishes in 2. A 10.30 in the quarter says it works.

..Preston..

 

is it possible to some how do that with an auto??

 

I take it that youre going to Imler and then Sac raceway on saturday, I will be there as well. I dont know how your stock trannys hanging in there, but id say launch it at about 10psi in 4wd and hit the lockup switch right after the tranny shifts into 3rd gear.

 

For automatic trucks, it's actually harder on the transfer case by shifting out of 4x4 after the launch. The problem is that forcing the transfercase into 2x4 without introducing some slack in the drivetrain causes the mode synchro and teeth to stay together while the mode shift fork is forcing them apart.

brnadon.