i'm going to be swapping my 305 tbi for a 350 tpi.my car is a 91 bird with an 4L60e(electronic)tranny(700r4).the motor i'm putting in is from a 89 bird.what year did gm switch over to a electronic tranny from a non-electronic(4L60)?i bought the motor,harness and ecm w/chip.

------------------
1991 banditt2 firebird #130of#600

 

93 was the last year for the non-electronic 700R4/4L60. You're saying you have a 4L60E in your 91? Or you have a 4L60?

You can use any non-electronic trans with a TPI computer, since the only thing it controls is the torque converter lockup. That is built into the PROM.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I think you are confusing the TCC Lockup function as being "electric tranny". Both the '89 and '91 have a regular 4L60 and the swap will be OK.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey, 22# injectors,
JET AFPR, Ported Plenum,
TB Coolant Bypass,
SSM SFC, Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

the tranny is the stock tranny!i thought i read some where that 91 was the first year for the 4L60E?

------------------
1991 banditt2 firebird #130of#600

 

Nope, 94 is the first year for the 4L60E. In 1990, GM changed the name of the trans from 700R4 to 4L60, but its the exact same trans. In 1994, it was changed to electronically controlled shifting, and given the name 4L60E.