Re: [AMC-List] My "new" J-10 truck!

["Swygert, Francis G MSgt 436 CES/CECM" <Francis.Swygert3@xxxxxxxxxxxx>]

Well, I was looking through the TSM that came with the truck (full 82
AND the 83 supplement! Reprints, but nice to have!!). The tow package
came with 3.31 gears. I might end up looking for a set of gears later.
Looks like 3.31 was a pretty popular gear for SJs. Available gears (from
late 80s TSM):
D  	-   2.73	-   15/41 
B  	-   3.31	-   13/43 
A  	-   3.54	-   11/39 
H  	-   3.73	-   11/41 
C  	-   4.10	-   10/41

According to www.wagonmasters.com, the 2.73 gears were stock in the GW
w/360 auto (only drivetrain from the late 70s on in the Grand Wagoneer),
all others were optional. 

----------------------------------------------------------
Date: Sunday, October 29, 2006 09:44 PM
From: Ken Ames <ameskg@xxxxxxxxx>

My J10 has the same trans and gears with a 258. Runs 1900 rpm at
60 in
4th.
Normal city driving uses 3rd a lot. 3rd in my trans is getting
noisey.
I've also used 4lo without locking the front hubs for low speed
maneuvering.
Shifting from lo to hi on the move gets a nasty crunch from the
transfer
case. I wouldn't recommend it as normal procedure. I have a set
of 3.31
diffs from a Cherokee that would help things if I ever get
around to
putting them in. :)
------------------------------

3.31 gears would bring rpm @ 60 up to ~2300, or drop you to 50
mph @
1900 rpm. Not bad, and I know you'd like the better pulling
power. I was
thinking a 3.08 would be sufficient -- ~2100 rpm @ 60. These
things
really don't like to cruise over 2500 rpm stock (65 mph w/3.31
gears),
but of course will. A better cam would help that, but I'm not
planning
on opening the engine anytime soon.  A small 4V would be nice,
and I'll
keep on the lookout for a used one. If I rebuild in 3-4 years,
provided
rust hasn't started becoming an issue, I'll build a 4.0L, maybe
even
another stroker. Might go ahead with a 4.0L exhaust manifold for
now...
need an exhaust system! Couldn't find a vendor with pre-bent
pipe for
sale though. Wanted to put it on myself and skip the cat.

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