I replaced the T350 trans in my 4x4 (behind a 350) with a 700R4 with reasonable
modifications (clutch pack, sprag type, how it locks up, etc.) and use the
truck to trailer other trucks. No breakie yet - in fact, I have only great
things to say about the 700R4 if properly set up. The breakie ones are the
early year ones and should be avoided.
>>> Bruce Ford <Booomie@worldnet.att.net> 04/17/99 11:32AM >>>
Another option, besides the 700, would be a 4L80 or 4L80E, which is basically a
TH400 with an overdrive. The is an electronic controlled. They are much more
durable than the 700s. Everyone I talk to say that the 700s will break no
matter what you do to them. Just another option. Also, in rebuilding my rear
for my monte carlo, I was able to replace the axles, posi unit, ring and pinion
for all under $1000. So that might be another good option.
Just some thoughts....
Bruce
Bob bdfentr wrote:
> If you want to stick (is that a pun?) with an automatic, you might try a
>Chevy 700R4. It is the one that is used with the Suburbans, etc and is an
>overdrive automatic. If you want to go with a standard, track down all the
>parts and pieces needed for a clutch (read as LOTS of work) and go with a
>98/98 5 speed from a 3/4 ton Chevy/GMC. The 5 speed has a somewhat compound
>low for stump pulling and the 5th gear is an overdrive. Any other regular 3 or
>4 speed transmissions are a 1 to 1 ratio in high gear and you would gain
>nothing. The other options might to be getting a 3:23 or a 3:55 ring an pinion
>replacement. This would give you more of a car rear end as far as the final
>drive ratio goes. You might even be able to turn 70 MPH at 2500RPM if you were
>to put in a 3:08 rear end ring and pinion. At any option you might be better
>off money and sense wise going to a shop and having the ring and pinion
>replaced. Good Luck...Bob Fentress
>
> ---------- Original Message ----------------------------------
> From: Passnb4U@aol.com
> Date: Fri, 16 Apr 1999 17:15:17 EDT
> >architectmsu@yahoo.com writes:
> >
> ><< bj: [oletrucks] '59 Chevy 3/4 ton tranny?
> > From: architectmsu@yahoo.com (wayne sellers)
> Reply-to: architectmsu@yahoo.com (wayne sellers)
> >
> > Hello,
> >
> > I am new to the list. I recently bought a 1959 Apache 3/4 ton 2WD.
> > The guy I bought it from took the original motor and tranny out of it
> > (with only 80,000 some odd miles on them! ARRRGGGHHH!), because it
> > wasn't running good. He proceeded to replace them with a 350 and
> > automatic tranny from an '86 El Camino.
> >
> > The truck has the original 4.57:1 rear end under it. Needless to say
> > it sounds a little wound up at about 40 mph and screams at 50mph.
> >
> > Damage being done by losing the original motor and trans, I think I
> > will just leave the 350 in it, but am afraid that I will burn the
> > tranny up trying to push those low gears.
> >
> > Does anyone have any suggestions as to a later model manual trans that
> > I could put back in to better accomodate the gear ratio?
> >
> > As I said earlier I'm new to the list (and the old truck process) but
> > am ready and willing to listen and learn. Any info would be helpful
> > and greatly appreciated!
> >
> > Thanks in advance,
> > Wayne >>
> >
> >
> > Wayne,
> >
> > You really have only two options that require the least amount of fabbing.
> >One would be to use a 700R4 tranny (4spd auto with .70 OD) or change the
> >rearend to a higher (lower numericall) geared rearend.
> >
> > You could also go with an overdirive manual transmission, but more work is
> >required, or get a overdrive unit (Gear Vendors come to mind) to bolt on to
> >the TH350 you have now, but the cost is around 2K for the unit.
> >
> > Good luck,
> >
> > Mike
> >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
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
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