Adding a Gear Vendors

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Edward Maxwell

Edward Maxwell

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I have an 86 K30 Standard cab long box, HT502, T400, 205 Tcase and a corporate 14 3:73 gears. I wanted it to stop screaming at me on the freeway and hopefully increase my mileage so I bought a 4l80E and a gear vendors od. Before I installed them I lifted it 4 maybe 5 inches(I forgot to measure the before) and put 35’s on. I am concerned if I move the tcase back two inches and install the GV will the driveline angle be a concern.
An old guy I work with tells me “Chevy put millions into this truck to develop it and you think you can improve it with 10k.”
Anybody have any experience with this.
Thanks
 
varmit86

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I am thinking the 4 speed 5l80e and a gearvendor will put you below where you motor makes power and the mileage will really suffer.

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Frankenchevy

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35s, 3.73s and a .75 final drive will put you at 1800rpm on the freeway. How low of rpm do you want to turn?
 
Edward Maxwell

Edward Maxwell

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I am thinking 4:10’s when I swap the lockers for arb’s. Max 2200 at 77mph. What’s that calc to?
 
yevgenievich

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Likely just the 4l80e will be enough.
 
shiftpro

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Overdrive on an overdrive transmission...?
Too low of rpm will give you worse mpg.
 
Edward Maxwell

Edward Maxwell

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I have to agree with everyone, thanks for the input.

Anyone want a NOS Gear Vendors?

I’ll make ya a good deal.
 
78C10BigTen

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Always wanted one for my th350 but.
 
Dave 84

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Edward Maxwell said:
I have an 86 K30 Standard cab long box, HT502, T400, 205 Tcase and a corporate 14 3:73 gears. I wanted it to stop screaming at me on the freeway and hopefully increase my mileage so I bought a 4l80E and a gear vendors od. Before I installed them I lifted it 4 maybe 5 inches(I forgot to measure the before) and put 35’s on. I am concerned if I move the tcase back two inches and install the GV will the driveline angle be a concern.
An old guy I work with tells me “Chevy put millions into this truck to develop it and you think you can improve it with 10k.”
Anybody have any experience with this.
Thanks
Click to expand...
I know a wise man that say the same thing lol he is right in a way but my ears cant hear him!
 
varmit86

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They use and adaptor and will fit almost anything with the right adaptor.

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71RAT

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varmit86 said:
They use and adaptor and will fit almost anything with the right adaptor.

Sent from my SM-G930P using Tapatalk
Click to expand...


I work for a GV dealer/installer. They do make kits for many applications. Fo you have adapter kit and electronics from the previous installation, or just the unit it self?
 
Edward Maxwell

Edward Maxwell

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I have part number 3 DO205B overdrive kit AC fixed and part number 3S0034 Speedo sleeve & gear T. According time to the packing list. I called GV to find out what I had and if I could make it work, but the tech guy was not available today.
 
71RAT

71RAT

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Edward Maxwell said:
I have part number 3 DO205B overdrive kit AC fixed and part number 3S0034 Speedo sleeve & gear T. According time to the packing list. I called GV to find out what I had and if I could make it work, but the tech guy was not available today.
Click to expand...

I'm sure they should be able to identify it. But, if you don't have any luck, post or send me a few pictures of the adapter housing. Particularly the transmission side, I may be able to tell by looking at it. All the 4x4 applications we have done, the GV unit installs on the rear of the Tcase.
 
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