87 GMC 1 Ton 6.2l

[Doc Feel Good]

Hey guys...

I picked up an 87 1 ton GMC 3+3 with D60 and 14bff and the 6.2l.

I have a quick question, what was the manual that came with this truck.

According to the gear shifter nob: it is a 3 speed with a granny. I did not crawl under this yet.

I will need to do almost a complete trear down, so I was thinking about upgrading the trans, suggestions. I want to stay with the manual, and dont want to fab alot.

Also, I check the 14bff and did not see a gear ratio tag, what was common with this setup: 6.2l and the 3speed with granny

Thanks,
Doc

 

[protechk5]

Should be a sm465. Sounds like a pretty rare truck to me. If you want to upgrade the trans, then get a nv4500, basically same trans but shifts better and has OD. Alot of people do that swap, so theres alot of info on this site. As for the gears, I have no idea. My truck with the same motor/trans and 31" tires topped out around 55-60mph with 4.56's in 3rd, so maybe that can probably give you some idea until you can pop the cover off and check for yourself.

 

[Doc Feel Good]

Thanks Protechk5....

Yeah been looking for a 3+3 4wheeler for months, this one was an old PG&E truck.

and it looks like it was painted with a roller and house paint... I have new power doors for it, but the cab will need to be stripped down alot....



Doc

 

[Doc Feel Good]

Just got it home.. some pics

 

[Duntz00]

My 82 k20 has 3.73's with a 6.2/sm465, I know mines just a 3/4ton but that will give ya an Idea as to what it could be.

Check the glove box and see what rpo codes it has. Also thats a nice start for a tow rig project, would love to find one like that.

 

[sledheadak]

i had a 85 crewcab 4x4 with the 6.5-they replaced the 6.2- 465/205 that had stock 4.56 gears.wasnt fast but would tow/haul anything i could get hooked to it or in it.
it got a solid 13 mpg loaded or unloaded and had a max speed of 70 mph but the engine was screaming at that speed lol.

 

[hillbilly deluxe]

Very cool. Where'd the bed go? How much?