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Nov 30, 2016, 2:32 PM

Post #1 of 5 (754 views)
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i have a 91 r3500 it had a tbi motor i am changing it to carb i need to know will a 4l80 tran work with a carb motor

kev2 profile image

Nov 30, 2016, 3:42 PM

Post #2 of 5 (745 views)
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we can make anything work... Cha ching $$$, Modifications, money, drivability, emissions, hassle factor loss of power all have me ask -
WHY would you want a carb?
google away -good luck

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 30, 2016, 4:13 PM

Post #3 of 5 (743 views)
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You think you are making things simpler but in reality, you are making it far more complicated to make it work right.

Not to mention that it is against Federal law to make a modification like that and drive it on US highways.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Ultimate Carjunky / Moderator
Discretesignals profile image

Nov 30, 2016, 4:48 PM

Post #4 of 5 (736 views)
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No it won't work. The transmission is computer controlled and needs sensor inputs like throttle position, MAP, position sensor inputs, and vehicle speed. The ignition system is also computer controlled.

Why would you convert it to carb anyway? TBI is far superior when it comes to reliability and drive-ability.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 30, 2016, 4:49 PM)

Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 30, 2016, 9:56 PM

Post #5 of 5 (714 views)
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All on same page - no. Keep it OE and TBI. 10 years older you might think of a change that would work out. EFI can handle crap fuel which is all there is much better than a carb so you are NOT making it simpler,


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