Author Topic: Engine and Drivetrain questions and clarifications  (Read 1268 times)

Offline 1967KaiserM715

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  • 1985 GMC K1500 w/ 6.5 TD
Engine and Drivetrain questions and clarifications
« on: June 27, 2015, 06:07:01 PM »
Hi all,
First post so please bear with me, I done a lot of searching, but still feel a little lost.

Currently my truck is a 1985 GMC K10, with 305CI, TH400, NP208, and (I have not double checked) 3.42 rear end gears. Originally came with 700R4, PO replaced transmission several times, which is how I got it(tranny is not working)

I would like to convert to manual, and if I have the money to get one, a 6.2 Diesel.

Ideally I would like to go for an NV4500, early with the lower first gear(6.**).

so 1st question- Is the only way to adapt the NV4500 to the Engine an Advance Adapter Bellhousing? or could a SM465 Bellhousing be modified to use with one?

2nd- Can a 350 flywheel be used on the 6.2 or do I need to find a diesel specific flywheel?

3rd- is there a vacuum pump available to use for the current vacuum brakes?

I have a 2wd 1986 1 ton, 350, sm465 as a parts truck, it does have hydroboost, just don't want to go through that hassle if I don't have to.

if you have any links to threads that that may help, please post them, I am here to learn, and search doesn't always provide

Thanks for the help
Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline roundhouse

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Re: Engine and Drivetrain questions and clarifications
« Reply #1 on: June 27, 2015, 09:06:10 PM »
The NV-3500 5 speed should bolt right up to your t case if it has the 32 spline input (which it should with a 400) and to the 6.2

First gear isn't as low but it's a great Trans for most people

You need a 6.2 flywheel


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Offline 1967KaiserM715

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  • Posts: 914
  • 1985 GMC K1500 w/ 6.5 TD
Re: Engine and Drivetrain questions and clarifications
« Reply #2 on: June 28, 2015, 01:20:02 PM »
The NV-3500 5 speed should bolt right up to your t case if it has the 32 spline input (which it should with a 400) and to the 6.2


I don't think I can use a NV3500, I have 4 wheel drive, and almost everything I have read shows that the clutch cylinder on the passenger side of the bell-housing will hit the drive shaft, I do know with some lift this wouldn't be a problem, but I have no plans to lift the truck

this is why I was looking at the NV4500 with the detachable bellhousing
Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline roundhouse

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Re: Engine and Drivetrain questions and clarifications
« Reply #3 on: June 29, 2015, 08:23:33 AM »
The 1997-2007 version has an internal cylinder



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