91 4L80E Pull - What do I need?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

da_raabi

Trailer Park Supervisor
Joined
Aug 7, 2013
Posts
1,403
Reaction score
901
Location
FloriDUH
First Name
Adam
Truck Year
1986
Truck Model
c30
Engine Size
454
So I found a guy with a '91 1 ton crew long box that he's parting out. Its the model that looks just like ours, not the newer 90s one. It has a 4L80E in it, what do I need for a complete conversion? So far I'm thinking:

Trans/converter
Intermediate drive shaft
Electronic speedo gauge cluster

Now the questions. Do I need any kind of module to go between the trans and the speedo? I will be running the 4L80E in manual with a Jake's manual controller and Lokar shifter, so I won't have a computer. I've read about DRACs, but I'm not sure whats up with that. Am I missing anything here? Thanks!
 

kleedus

Full Access Member
Joined
Jan 25, 2012
Posts
1,726
Reaction score
162
Location
wyo
First Name
Ray
Truck Year
1960 threw 91
Truck Model
c10 to k30
Engine Size
350 threw 454
2 or 4 wheel drive
 

John81287

Full Access Member
Joined
Mar 19, 2013
Posts
636
Reaction score
4
Location
Mchenry,IL
First Name
John
Truck Year
1987
Truck Model
V20
Engine Size
5.0
Does it have a 454?
 

da_raabi

Trailer Park Supervisor
Joined
Aug 7, 2013
Posts
1,403
Reaction score
901
Location
FloriDUH
First Name
Adam
Truck Year
1986
Truck Model
c30
Engine Size
454
It had a 454, engine is gone. It is a 2wd though.
 

austinado16

Full Access Member
Joined
May 25, 2012
Posts
611
Reaction score
222
Location
Central Coast, CA
First Name
Todd
Truck Year
1990 w/307k miles on the clock
Truck Model
GMC V1500 Suburban SLE
Engine Size
5.7L TBI/4L60/3.42's
Any chance it still has the extra long radiator, fan shroud, mount brackets, etc.? Would love to stuff one of those into my 'burb.
 

da_raabi

Trailer Park Supervisor
Joined
Aug 7, 2013
Posts
1,403
Reaction score
901
Location
FloriDUH
First Name
Adam
Truck Year
1986
Truck Model
c30
Engine Size
454
No clue. I know almost nothing about the truck, I only asked him about the trans. I can look though. The guy wanted to sell me the whole truck for 1500 without a motor, if I hadn't just bought the one I have I'd jump on it!

Does anybody know how the electronic speedo works on these late-model trucks so I know what to pull?
 

GreaseDog

Full Access Member
Joined
Aug 8, 2010
Posts
1,189
Reaction score
36
Location
Elkhart, IN
First Name
Jeremy
Truck Year
1977 K20
Truck Model
1980 K2500
Engine Size
350
No clue. I know almost nothing about the truck, I only asked him about the trans. I can look though. The guy wanted to sell me the whole truck for 1500 without a motor, if I hadn't just bought the one I have I'd jump on it!

Does anybody know how the electronic speedo works on these late-model trucks so I know what to pull?

Every bit of the wiring harness you can get. Without all of it, the trans is useless.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,128
Reaction score
9,299
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
And the PCM to control the trans. Be a good time to convert your motor to TBI too since the PCM will be the correct one.
 

austinado16

Full Access Member
Joined
May 25, 2012
Posts
611
Reaction score
222
Location
Central Coast, CA
First Name
Todd
Truck Year
1990 w/307k miles on the clock
Truck Model
GMC V1500 Suburban SLE
Engine Size
5.7L TBI/4L60/3.42's
Any more info about the radiator/fan shroud/top panel and mount brackets?
 

da_raabi

Trailer Park Supervisor
Joined
Aug 7, 2013
Posts
1,403
Reaction score
901
Location
FloriDUH
First Name
Adam
Truck Year
1986
Truck Model
c30
Engine Size
454
Nope sorry guys, this one got away. I think the guy really just wanted to sell the truck as a whole. He advertised as a part out but was really pushy about selling all together. Oh well. Next time I guess.
 

Latest posts

Forum statistics

Threads
44,173
Posts
950,863
Members
36,288
Latest member
brentjo
Top