start out in 1st then immediately shift to second when they start spinning ...

 

We don't use 1st gear for the burn out. Start in 2nd and pull to 3rd.

 

We don't use 1st gear for the burn out. Start in 2nd and pull to 3rd.

he's got an automatic valve body ... no way to start in second ...

 

Also, dont forget to ease out of the burnout to reduce shock to the sprag. You dont want to just yank your foot off the gas and let the tires hook.

 

Grudd do you have a manual automatic or just an automatic.If it is a manual auto 68_Val_Sedan and Blvedere are both correct. []{} []{} .If it is a automatic you can pick any gear you like.JEDS67

 

I have good luck using high gear! 0/

 

ok, I couldnt get to my computer in time before i went to the track. The transmission is a full automatic. I put it in drive and let it shift itself. Seemed to work fine.

 

u dont stand as big a chance tearing the sprag out if u come outa the water in high gear

 

Doing a burn out in drive will still load the sprag hard, you have no band application. In manual 1st you are utilizing the low band as well as the sprag.

 

start out in 1st then immediately shift to second when they start spinning ...

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.........................With a fully auto v/b u will want to start out in manual 1st, shifter in 1st ,and keep it in 1st, so u keep the rear band applied, if u allow it to shift to 2nd all will b fine till the tires grab and it down shifts to 1st with no 1st band apply it can and will tear/rip out the sprag....Its like anything else, u can only get away with playing the odds so many times till it catches up with u, which them u will have an explosion............kim........

 

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so just do a first gear burnout?

 

...............U got it......................kim..........

 

I've been told to ONLY do a 2nd gear burnout, not that doing a 1-2 shift isn't bad, but it can cause the rear sprag to come out and then the drum lets go.

Auto shifting... no idea..... Power brake?

This is what happens whent he front drum explodes:

The last one is a picture of my floor where the tunnle hump was welded with the firewall. It split the weld from the drive side to the passenger side and put quite a bit of a "bump" where my foot was. Noy sure if you'd want this to happen.

Cause by a 727 reverse manual valve body. Just my knowlege (which isnt much lol)

 

We need to delve further into this; exactly what happened, and what caused it?

 

The fully auto VB needs to start in Manual low. It then uses the band to hold the low reverse drum,
not just the sprag. If the sprag fails it lets the forward drum spin at over 2 times the engine speed.
This can cause the exploded drum and case you see in the pics.

Manual VBs can be started in 2nd and avoid 1st during burnouts.

Rick