transmission slip?

[early99powerstroke]

I was brake boosting my truck at the dragstrip and when the light turned green and went to take off it was like the truck defueled extremely hard and then picked the power back off and started to accelerate. Would this be the clutches slipping? I had it at about 3k rpms when i was building boost.

 

[early99powerstroke]

I also have a code for the output shaft speed sensor. I don't know if this would cause the issue

 

[Mark Kovalsky]

If the clutches slipped the RPMs would shoot up like the trans was in neutral.

 

[Lethalthreat7.3]

Electrical. Check your vss.

 

[early99powerstroke]

will do! Also seems like it hesitates between shift just a bit but only when launching at the line under hard acceleration. Hoping its only a sensor.

 

[David N]

How long were you on the converter staging up? Sounds like you flashed the converter. I did that several times on my stock torque converter.

 

[lincolnlocker]

did the same thing a week or so ago! hot lapping at the strip... trans got a tad warm but not horrible... was on the converter to long and it messed up just like whats been mentioned... pulled codes and it was vss codes... let it cool off while eating supper and when we left it was fine and shifted like it always has.

live life full throttle

 

[early99powerstroke]

I was staging for awhile. trans got about 160 degrees. I let it cool off and now it shifts and locks up fine.

 

[bad12jr]

I try to stay off the convertor till the other lane gets on the first beam. Then jump in but the convertor will stall pretty well to 3200 on the brakes. Mine did that once hot lapping but not to that extent. Left after and cooled it down on the road.

Sent from my DROID RAZR HD using Tapatalk 2

 

[early99powerstroke]

My torque converter stall speed is 2k rpms and I was staging at 3k rpms wonder if this contributed to my issue?