New Guy

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.

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
6,304
Reaction score
8,244
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
I don’t have the truck yet, but as soon as I get it, I’ll post some pics.
I have an f250 I’ve been pulling my rig with, so I’m fine there, just thought it’d be cool to pull up with my rock climbing cj7. I’m sure now, I’ll keep it somewhat original, keeping the 350. I’ll probably put a fuel injection system on it though.
Is there anywhere I can put in the vin and tell what the original equipment was?
Look for the SPID in the glovebox.

The 6.2 diesels that came factory in 80s square bodies were geared towards fuel efficiency. It won’t be a powerhouse towing. Not worth the effort to swap to a 6.2 diesel unless you are really after a fuel efficient truck with a period correct diesel.

Looking forward to seeing pics of the truck!
 

Hoghead

Junior Member
Joined
Apr 18, 2025
Posts
5
Reaction score
7
Location
Rockwall, TX
First Name
Rick
Truck Year
1986
Truck Model
Custom Deluxe k20
Engine Size
350
I’m not sure what transmission or transfer case is in it. It’ll be a couple of weeks before I see it again. So crawling under the truck, how do I tell which trans and transfer case is in it?
 

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
6,304
Reaction score
8,244
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
I’m not sure what transmission or transfer case is in it. It’ll be a couple of weeks before I see it again. So crawling under the truck, how do I tell which trans and transfer case is in it?
Shape of the pan on the trans will tell you which transmission. Most likely it has a th400. Although, an 85 k20 burb I looked at came with a 700r4. The transfer case will either be steel (205) or aluminum (208). There may still be a data tag on it.
 

JamesSam

Full Access Member
Joined
Feb 15, 2023
Posts
1,946
Reaction score
5,370
Location
VA
First Name
Sam
Truck Year
1987
Truck Model
Silverado V10
Engine Size
5.7 L 350 v8
I’m not sure what transmission or transfer case is in it. It’ll be a couple of weeks before I see it again. So crawling under the truck, how do I tell which trans and transfer case is in it?

Shape of the pan on the trans will tell you which transmission. Most likely it has a th400. Although, an 85 k20 burb I looked at came with a 700r4. The transfer case will either be steel (205) or aluminum (208). There may still be a data tag on it.
You can find several different transmission pan shape identifying diagrams with a quick internet search.
 

Hoghead

Junior Member
Joined
Apr 18, 2025
Posts
5
Reaction score
7
Location
Rockwall, TX
First Name
Rick
Truck Year
1986
Truck Model
Custom Deluxe k20
Engine Size
350
Thanks friends for your help, I’ll get back as soon as I put eyes on the transfer and tranny.
 

Latest posts

Forum statistics

Threads
45,492
Posts
984,538
Members
38,549
Latest member
quadridersam
Top