Engine shuts off when transmission is shifted into gear?

Tiny
AGUSTINCERNA
  • MEMBER
  • 1992 CHEVROLET 2500
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 210,300 MILES
I changed the starter and spark plugs and spark control module and a brand-new battery, but the thing is that if it’s warmed or not I put it on drive or reverse it shuts off and when I turn it back on it turns on and I put it on reverse or drive it shuts off.
Sunday, August 7th, 2022 AT 2:49 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,144 POSTS
Yep, this happens when the torque converter falls apart and locks up the engine to the transmission, so when you put in gear it stalls the engine much like a stick shift car when you let the clutch out too fast. It could also be a vacuum leak which this guide can help find, test it with the engine cold:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/stall-at-idle

If you can shoot a quick video so i can see the engine stall, I can tell for sure. You might want to try holding the idle up a little when you put it in gear, if the truck tries to take off you know it is the converter. Let me know what you find.

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Monday, August 8th, 2022 AT 11:49 AM

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