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Old 09-25-2011, 02:35 PM   #1
Dieselburb86
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1986 6.2 2wd "j" code

Hey I just aquired to use, from my dad, a 1986 GMC Half ton 2WD. It has 6.2 "j" code engine and a 700r4 tranny with 3.42 gears. Is this a good set up?
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Old 09-25-2011, 02:40 PM   #2
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Re: 1986 6.2 2wd "j" code

Very good! You should get minimum 15mpg city, but more like 18. And highway will be 22-32mpg, depending on tire size, speed, wind, hills, etc etc.

Great torque and good power. Should last forever!
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Old 09-26-2011, 01:43 PM   #3
Dieselburb86
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Re: 1986 6.2 2wd "j" code

I do average 21 mpg, but thats going 65mph. I drive 25 miles one way to work each day. Im happy with that!
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Old 09-26-2011, 01:45 PM   #4
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Re: 1986 6.2 2wd "j" code

Any other questions feel free to ask!
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Old 09-26-2011, 09:02 PM   #5
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Re: 1986 6.2 2wd "j" code

Quote:
Originally Posted by Dieselburb86 View Post
Hey I just aquired to use, from my dad, a 1986 GMC Half ton 2WD. It has 6.2 "j" code engine and a 700r4 tranny with 3.42 gears. Is this a good set up?
Sweet!!!! 2wd or 4wd. I have an 83 4x4 with 3.73 gears and I was averaging high 20's for mileage. Unfortunately, I have to rob the engine out of it to get my suburban going. I'm hoping to get a 6.5L turbo diesel for it around tax return time.
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1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver)
1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam
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Old 09-27-2011, 06:15 AM   #6
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Re: 1986 6.2 2wd "j" code

That sounds like a nice set-up. Is this a Suburban,I assume? Nice!!

I've never heard of mileage over low to mid-twenties before. I've owned four 6.2s and never got better than 22 mpg. The 6.5TD gets 5 or less MPG. My '92 gets 15 mpg,it doesn't matter where or how I drive. Take it real easy and it gets 15.5 mpg. I feel that's great and well worth owning.
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Old 09-27-2011, 09:38 AM   #7
Dieselburb86
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Re: 1986 6.2 2wd "j" code

It is great, but here in Minnesota diesel is $4.00 a gallon and the suburban has a 40 gallon tank. :-(
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Old 09-27-2011, 03:23 PM   #8
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Re: 1986 6.2 2wd "j" code

Well,you are getting 800 or more miles out of that and a 350 would get more like 400. So do the math,you're still ahead.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

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GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
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Old 09-27-2011, 06:56 PM   #9
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Re: 1986 6.2 2wd "j" code

That is true! For as rusty as it is, it is a fairly decent truck. The truck runs a heck of alot better than it looks! I do love the mileage. If I had the cash I would love to just purchase it from him and put a clean body on it, and do a mild restore to stock!
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Old 09-27-2011, 08:57 PM   #10
68Timber
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Re: 1986 6.2 2wd "j" code

One of the many reasons I love my M1009 - I don't have to stop for fuel every time I drive it, not by a loooong shot.
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