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12-23-2024, 12:11 PM
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#1 |
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Registered User
Join Date: Mar 2023
Location: Portland, OR
Posts: 83
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4l60E with 1990 tbi 350?
Hello all,
I currently have a 700r4 mated to my 350 tbi engine in my 68 step, but the trans has no reverse and needs to be rebuilt. I'm going to buy a new/rebuilt one in March or April and then finish the rest of my restoration by June. The 700r4 trans is from a mid-80's Corvette also, so it has that weird flat-sided Corvette tail shaft housing that was a bear to mount to my trans cross member. I'm wondering if I could instead just buy a rebuilt 4l60E so I don't have to mess with the tv cable setup, or would it be more trouble than it's worth? Not sure if the tbi computer would manage the shifting correctly, if the sensors hook up similarly, would I need to shorten/lengthen my driveshaft, etc., either. Thanks for any input, and Happy Holidays! |
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12-23-2024, 03:15 PM
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#2 |
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Senior Member
 Join Date: Aug 2005
Location: Los Angeles
Posts: 1,366
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Re: 4l60E with 1990 tbi 350?
You would need to buy a 'stand-alone' transmission control module and harness to make the 4L60E shift. The connectors are completely different. Your TBI ECM does not have that capability to control an electronically shifted transmission. It would be a lot more trouble than dealing with a tv cable.
__________________
1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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12-23-2024, 03:18 PM
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#3 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,223
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Re: 4l60E with 1990 tbi 350?
.
Seems there are lots of folk out there with TBI 350 /4l60e combos that want to carb swap and keep the tranny control. While I didn't read all the way through this thread I believe it could point you in the right direction. https://www.s10forum.com/threads/how...-4l60e.461481/ Otherwise you'd need and aftermarket controller...but I think you can make due with what you have. As for the dimensions and whether or not you'd need to adjust shaft length, according to this article: https://non-stoptransmission.com/en/info-chevrolet.php The Corvette trannys (700r or 4l60e) length from mount flange to tip of tail shaft is 29 7/8 " whereas all other 700r/4l60e are 30 3/4 " Hth, -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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12-23-2024, 03:38 PM
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#4 |
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Registered User
Join Date: Mar 2023
Location: Portland, OR
Posts: 83
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Re: 4l60E with 1990 tbi 350?
Great info guys, thank you. That's exactly what I was looking for. I'll just make do with the 700r4.
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12-23-2024, 03:49 PM
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#5 |
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Senior Member
Join Date: Aug 2005
Location: Los Angeles
Posts: 1,366
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Re: 4l60E with 1990 tbi 350?
That is correct, there were TBI engines used with 4L60E's from 1993 to 1995, but they use a different ECM than the non-electronic transmission trucks. And of course the harness is different too.
__________________
1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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12-23-2024, 04:19 PM
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#6 |
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At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,257
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Re: 4l60E with 1990 tbi 350?
I have a hgm electronics running a 4l80
Works neat and it's completely customizable with your phone via Bluetooth.
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" That didnt make it any newer " " Dont antique the equipment " |
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