Jim, was able to dig up original message that I refered to about the A-833.
J Forbes wrote:
> Hi...I'm back in lovely Sierra Vista, my stay in Las Vegas was
> pleasant. I got to see the new (mid 2000?) Suburban and Tahoe, which
> are based on the 1999 Silverado (which is what I drove up
> there...thanks, Janet!)
>
> The tranny used in some 81 (possibly other years?) GM trucks, with
> overdrive, is a New Process 4 speed. This is the transmission that was
> used in Dodge CARS and light duty trucks in the 80s. It is based on the
> A-833 4 speed car transmission, but 3rd is direct, and 4th is
> overdrive. They do this by switching the shifting of 3rd and 4th, and
> making what would normally be 3rd gear and overdrive ratio. The 81
> Chevy truck service manuals are ambiguous...the overhaul sections shows
> pics of a Dodge type tranny, with the funky Dodge input shaft. But, the
> Chassis Service manual shows a cutaway drawing of the tranny with the
> normal Chevy input shaft! I have never seen one of these beasts, so I
> can't tell you whether or not it has a Chevy tranny bolt pattern on the
> front, but it might...so it could be a straightforward swap. You would
> need the special floor shifter that comes on it in trucks...or possibly
> adapt a Dodge car od shifter. I don't know about the driveshaft yoke,
> or the speedo cable, etc...
>
> I've also seen a neat late 80s Mexican Chevy truck 4 speed, I don't know
> if it was an overdrive or not...but it was a Ford Tremac aluminum top
> loader, with a floor shift similar to that used on the big "normal"
> truck 4 speeds. Had a special bellhousing, with a hydraulic clutch, and
> some other neat features. Good luck finding one! I saw it at a friends
> shop, a fellow from Mexico wanted an automatic (not available there),
> and the 4 speed was leftover from the swap.
>
> Jim (who favors a simple 3 speed automatic, mild rear gears, and the
> torque of a big block)
> -----------------------------
> ORIGINAL message:
> Along the subject of this thread I see an ad at Stovelbolt Engine Co for
> a
> NP 4
> speed from a 81 GMC that bolts in the same is the Saginaw. The seller
> says
> 4th
> gear is OD. Anyone familiar with these?
>
> Grant G
> 50 3100
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|