1990 to 94 transmission issues
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1st Gear
Joined: Nov 2025
Posts: 1
Likes: 0
1990 to 94 transmission issues
I’ve got a 1994 Corvette that I got with no transmission. I took a transmission from a 1990 Corvette and I’m having issues.
What is the best way to adapt electrical connections for the 94 Corvette to the 90 transmission
What is the best way to adapt electrical connections for the 94 Corvette to the 90 transmission
Heel & Toe
Joined: May 2009
Posts: 16
Likes: 3
From: Rio Rico AZ
One of your main problems is the 1994 4L60-E transmissions shift points are controlled by the ECM, while the 1990 700R4 transmissions shift points are controlled by the TV cable. I'll let the experts chime in on other issues and if there are any workarounds.
Safety Car
Joined: Mar 2017
Posts: 4,206
Likes: 1,325
From: LeClaire Iowa
I sure don't know your financial situation, but it might end up cheaper to buy a 4L60E. I have no idea if Monster Transmission is any good but you can get a rebuilt 4L60E for $2,200.00. Then you can sell the one you have. I have to believe the resale value would increase. Dan edit: I see Monster does not have a 1994, but somebody does.
Last edited by Whaleman; Nov 23, 2025 at 08:44 PM.
Pro
Joined: Aug 2020
Posts: 647
Likes: 126
From: Liliha Bakery stuffing my face with coco puffs!
You'd be better off using the correct trans but if you're hell hent on using the '90, I think it's possible but the PCM is not going to be happy looking for the E trans. In truck PCMs that I've used 700r4, I had to turn off ~27 parameters to make the PCM ignore transmission controls the E trans is looking for. One other thing, your throttle body won't have a pin on the throttle lever for the TV cable. I believe you can get one with that pin on the '92-'93 LT1s or I seem to recall an aftermarket piece that can be added. Cheers!
Melting Slicks
Joined: Feb 2003
Posts: 2,677
Likes: 812
From: Saskatoon Sask.
When I see a thread such as this, I say to myself "fk 'em". If they can't spend the effort to join in, then I have zero effort to help them.
