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Old 08-07-2017, 01:40 PM   #11
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Location: Fayetteville Arkansas
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Year: 1991
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Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
OK,
He said it without OD. So are we fairly confident it is the TH400? I can't decide if I should keep it or not. How will it do on the highway and in town? I was hoping for decent gas mileage. Searching for 1991 G3500 Vandura online it's claiming around 15 MPG. Could this even the correct?
https://www.fueleconomy.gov/feg/bymo..._Vandura.shtml
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Old 08-07-2017, 02:27 PM   #12
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Originally Posted by cadillackid View Post
91 "should" be Throttle Body injected 350 and may have overdrive.. quick pics of the engine compartment wit hthe air cleaner off and the PRND shifter label will tell you if it has a 700R4 trans or not.. in 1991 some of them did.

the 700R4 is a lockup overdrive transmission however it wasnt the strongest muscle in the arm, if you arent planning to tow or haul a ton of weight a 700R4 is OK.. but load themn down heavy and they break.. on vehidles with the 700 it would be a PRN(D)D21 (D) being circle D or overdrive..

-Christopher
Good info. I have a 1992 chevy with the 700R4. A good note, 1 - 2 - D - (D). The overdrive is inside a big O. On both of my 4L80E trucks, it is; 1 - 2 - 3 - D.

I haven't seen any 700R4 in one yet, but he is spot on. You can find that tranny in a lot of early 90's 1500 chevy pickup trucks. But if I recall GM went straight from the TH400 variants into the 4L80E in the heavier duty chasis around 91. Since the 700R4 would not hold up well to towing with a 454 or 6.5L. But none the less, always a possibilty.

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Old 08-07-2017, 02:38 PM   #13
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OK,
He said it without OD. So are we fairly confident it is the TH400? I can't decide if I should keep it or not. How will it do on the highway and in town? I was hoping for decent gas mileage. Searching for 1991 G3500 Vandura online it's claiming around 15 MPG. Could this even the correct?
https://www.fueleconomy.gov/feg/bymo..._Vandura.shtml
As long as the info you are given is correct. Which is a big IF. I feel confident confirming the likelihood of a TH400 variant W/O OD. I would expect mileage to vary, but presumably 14-16 mpg hwy, and somewhere around 10-12 mpg city. That is an educated guess, nothing more. Biggest factor will be rear end ratio, which you can only really determine once you get it.

Still a cool bus, and I doubt you plan on doing any highway adventures in it. Getting a bus is always a gamble, no matter how experienced. Just gotta make the best of what you get. If you want Overdrive, you may want to research dropping in a 4L80E from any 90's 3/4ton+ truck. It has O/D, and they are bountiful in junk yards and on CL.

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Old 08-07-2017, 03:16 PM   #14
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Join Date: Sep 2016
Location: Fayetteville Arkansas
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Year: 1991
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Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
Thanks. I guess I'm going to finish the purchase.
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Old 08-07-2017, 07:09 PM   #15
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Anyone else have a daily driver? Let's see them.
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Old 08-07-2017, 07:22 PM   #16
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Join Date: May 2009
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Year: 1991
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Here is my redByrd - I took it to Asheville NC this past week for a Vintage Christmas COnvention.. so i even lettered it for the occasion..

right now its in front of my apartment in st pete.. I typically drive it nearly every day to places like starbucks, and to dinner, etc..

3AE5860F-3D6F-4E82-B07C-559F916F5A8F.jpg

asheville at the christmas convention.. everyone Loved it and wanted to ride it!
IMG_2098.jpg

Coffee time!!!
IMG_2067.jpg

Summer Night city-drive - stereo up.. windows open!
IMG_2087.jpg

-Christopher
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Old 08-07-2017, 09:06 PM   #17
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Originally Posted by cadillackid View Post
Here is my redByrd - I took it to Asheville NC this past week for a Vintage Christmas COnvention.. so i even lettered it for the occasion..

right now its in front of my apartment in st pete.. I typically drive it nearly every day to places like starbucks, and to dinner, etc..

Attachment 15133

asheville at the christmas convention.. everyone Loved it and wanted to ride it!
Attachment 15136

Coffee time!!!
Attachment 15134

Summer Night city-drive - stereo up.. windows open!
Attachment 15135

-Christopher
I LOVE that bus!
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Old 08-07-2017, 11:01 PM   #18
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Location: Houston, Texas
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redByrd Rocks!
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Old 08-07-2017, 11:07 PM   #19
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Year: 1991
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Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
Very cool man. It's a necessity for me to use a bus. Sometimes I need to get out of my chair on long trips and we need something you can stand straight up in for transfers. I will always have one. Now I have small and medium next is large!
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Old 08-07-2017, 11:58 PM   #20
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Bery cool man. I will always have one. Now I have small and medium next is large!
Uh oh, the sickness is bad with this one.
Do t bla.e ya one bit. I'm sick myself and only on #1 but looking for #2, 3 and 4...
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