1987 Chevy Nova Transmission change

Tiny
GPSJR10
  • MEMBER
  • 1987 CHEVROLET NOVA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
I have the A131L 3 speed automatic trans in my Nova. I was wondering if I can install a different Toyota 4 speed trans in it's place.
Wednesday, August 27th, 2008 AT 9:35 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
The A420 is the 4 speed trans. I am not sure if it was offered in '87.

While it would probably bolt up, the ECM's are different as well as shifting control (TV cable vs. Vacuum).

If you still have the owners manual, check to see if it shows the 4 speed.
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Saturday, September 13th, 2008 AT 5:41 AM

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