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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: yzrider on February 22, 2010, 09:16:08 am

Title: '79 c30 trans question
Post by: yzrider on February 22, 2010, 09:16:08 am

Ive got a 79 c30 dually with a manual trans.  Its a 3 speed with a granny gear and was wondering if theres an od unit I can bolt on or an aux unit or something like that to give this rig some longer legs. 

Title: Re: '79 c30 trans question
Post by: frito-bandito on February 22, 2010, 10:33:29 am

You could always do a NV4500 swap, or go with a built 700R4 automatic. If you search on here, you will find info on how to do this swap, I'm looking to do a similar swap myself, good luck.

Title: Re: '79 c30 trans question
Post by: yzrider on February 22, 2010, 10:50:52 am

I want to keep it a stick.  Is the nv a manual?

So a trans swap is the only option?  ALso is the trans I have considered a 3 speed or a 4 speed? 

Title: Re: '79 c30 trans question
Post by: frito-bandito on February 22, 2010, 09:00:31 pm

Yes the NV is a 5 speed syncronized overdrive manual. I've heard about add on overdrive, but I've never seen it. If anyone knows about this type of OD i'd like to know more about it.

Title: Re: '79 c30 trans question
Post by: Captkaos on February 22, 2010, 09:39:47 pm

The add on overdrive is EXPENSIVE, like more than the cost to convert to a NV4500..

http://www.gearvendors.com/cg2wdt.html