Is this harmful to a tranny? A close freind of mine that builds tranny said that i shouldnt manualy shift my 700r4 while burning out, because it is bad for the internal stuff. Is there any truth in this. thanks alot

 

its the same as shifting while driving. your wheels are spinning arent they!!

so i dont see how it would be bad.

and i manual shift all the time

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Jarrad
1990 IROC-Z L98 350 TPI
TH-700R4
G92- 7.5" 10 Bolt 3.23gears
Bright Red Hardtop/ Grey Custom Interior
5,507 IROC's Hardtops/Ttops; 2,415 5.7L IROC's Produced in 1990

DAILY DRIVER: 1991 S10 2.5L/5SPD WITH CAMARO RIMS

 

Are we talking shifing up, or down?? (Just kidding)


190 HP or 500 HP
Power brake first.....
Starting off in manual 1, wait till the motor is in the power band, go to second, at that point let off the brakes and give it full throttle and away you go!!! Watch the rpm while you keep the car straight, if you run out of second gear go to third gear if you have enough road and HP.

Stay out of fourth.

As long as your tranny is in good shape there will not be any problems. Also don't do it ten times in a row so you don't overheat things.


That is how you are SUPPOSED to do a burnout!

Enjoy......

 

On a T400, you can overrun the intermediate sprag when shifting from 1st to 2nd during a burnout (shifting during a burnout is entirely different than shifting under load). You should always start in 2nd gear (assuming a manual valve body) and shift to 3rd before leaving the water box. I am not sure if the 700r4 works the same, but it is probably similar.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon )
www.koolmeister.com

 

The intermediate sprag on both the TH350 and TH400 can be damaged if the tires hook up while coming out of the water box in second gear. I destroyed one last year right at the start of the season doing that. I'm not sure about the internal workings of a 700R4.

Usually you start the burnout in low gear (no manual valve body). As soon as the rpms come up shift to second to build up tire speed. When the tires are hot enough, shift to high gear and come out of the water box under controlled deceleration. Don't just lift off the throttle quickly. That's what will cause the most damage.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

According to Trans-Go. BURNOUTS: In water or bleach box: Break it loose in 1st/2nd, then upshift to 3rd.
Hope This Helps!!!

 

Yep... What he mentioned before. The most important thing is to NOT lift quickly on the burnout. It's really hard on the sprag and shocks the whole drivetrain.

 

Thanks for clearing it all up guys