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Old February 28th, 2017, 01:03 AM
turbobill turbobill is offline
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Location: northern NY when not flying
Truck: 1968 HM80 with a 478M and a few engines plus a Toro-Flow
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Default Re: Project Blown 305

All the newer stuff has married transfer cases. Most manufacturers started marrying transmissions and transfer cases in the later 60's. I mentioned some exceptions in an earlier post.

GM went to left side (front axle) drive starting with the GM T400 trucks in '88. If you use a transmission/transfer case from one of those trucks, you'll have to use a Ford front driving axle if you are going to go with a straight axle. Somewhere a long the line, Dodge went to left side drive too (maybe '94?). My 97 Dodge has a Dana 60 front axle with left side drive.

Some GMC 305's had Chevrolet automatic transmissions behind them in the mid 60's, so sourcing the necessary parts would allow you to use a 700R4 or 4L80E Overdrive automatic behind your engine. The older 700R4's don't use a computer to control them (pre '94), so using one of those would be easy. 4L80E's are electronically controlled, so a stand alone controller is necessary (expensive), or there is a kit to make it a full manual shift.

The 700R4 can be built strong with aftermarket parts. The 4L80E is strong enough as is. Many 4 WD trucks came with these two transmissions, so finding one with a transfer case attached is easy depending on where you live. (they are all over up here in the snow belt)

Last edited by turbobill; February 28th, 2017 at 01:11 AM.
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