Wiring connector questions, pre-89 and 89+ transmisisons

mirage83 · 03-19-2017, 10:52 PM

Got a question I'm having difficulty finding an answer to. Are there any differences in the wiring connections between pre-89 and 89+ automatic transmissions? I've got an '88 and have a transmission out of an '89 available if all the connection will plug up right. Thanks in advance for any information on this.

btwilson86 · 03-28-2017, 03:17 AM

As far as I know, the transmission wire connections are the same (as long as you're sticking with the same transmission; a340e, w58, r154). I can't say that with 100% certainty, but I can't say I've come across any transmissions that didn't connect to the wiring harness correctly.

mirage83 · 03-28-2017, 11:59 PM

Excellent. I much appreciate that information, as I've been waiting to swap transmissions until I had at least some confidence that the wiring connections are the same on both. Thanks for chiming in.

mirage83 · 05-10-2017, 12:58 AM

Quote:

Originally Posted by btwilson86

As far as I know, the transmission wire connections are the same (as long as you're sticking with the same transmission; a340e, w58, r154). I can't say that with 100% certainty, but I can't say I've come across any transmissions that didn't connect to the wiring harness correctly.

Just wanted to follow up with you on this, as there is indeed no wiring difference that I could find. Plugs right in. Now, the extension housing (tailshaft housing) is different as the speedometer plug is on the opposite sides of the housing, and the shift rod is different, but wiring is the same.

03-19-2017, 10:52 PM	#1
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	Wiring connector questions, pre-89 and 89+ transmisisons Got a question I'm having difficulty finding an answer to. Are there any differences in the wiring connections between pre-89 and 89+ automatic transmissions? I've got an '88 and have a transmission out of an '89 available if all the connection will plug up right. Thanks in advance for any information on this.

03-28-2017, 03:17 AM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	As far as I know, the transmission wire connections are the same (as long as you're sticking with the same transmission; a340e, w58, r154). I can't say that with 100% certainty, but I can't say I've come across any transmissions that didn't connect to the wiring harness correctly. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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03-28-2017, 11:59 PM	#3
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	Excellent. I much appreciate that information, as I've been waiting to swap transmissions until I had at least some confidence that the wiring connections are the same on both. Thanks for chiming in.