@sound: "What would be the ramifications of changing the rear end gear in
my 96 S10 2.2 automatic from 3:23 to 3:42?
I think this is the oval 7.5 rear end. At this point, i think i might
have a chipped gear on the pinion and have a chance to buy a gear set
out of a 99 for reasonable. (not the whole rear end, just ring and pinion)
With a lower gear, what kind of mileage penalty should i expect?
(I am getting 17/18 MPG in town now)
How hard is it to change the spedo gear for speed correction?
I have seen things before that it is not an easy task to get the gears
to mesh correctly. I take it its more than just dropping a gear set and
pinion out and dropping another one in. How difficult is it to set the 
shims and the gear mesh point?
If this is a big issue, how old of S10 complete rear gear (or any other 
GM) will swap in? What years did they change the spline count on the 
axles? Would a F body rear work? I am not trying to beef it up or change
the whole rear housing and all. I would like to just pull the 
differential and repair or replace it. This truck also has anti lock.
Any difference in the rear ends? I did not notice any electrical 
connections out of it.
Bob
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    @veinless: "In rec.autos.tech Bob Urz <email_address> wrote: What would be
<quote>
Hi Bob,
  Just a quick note - our 2002 2.2L Sonoma has 4.11 gearing.  I
cannot image how sluggish she would be with 3.23 gearing.  Are you
sure your 1996 came with 3.23 gears?
Dennis
null     up  36 days,  5:33,  2 users,  load average: 0.13, 0.15, 0.11
thruster up 129 days, 10:15,  0 users,  load average: 1.04, 1.02, 1.00"
    @jv9999: "<quote>
You won't notice the difference between a 3.23 and a 3.42. Both seem too 
low (numerically) for a 2.2L. To set the gears up takes some skill and a 
  dial indicator. I would look for a used rear (complete) rather than 
mess with the gears if you haven't done this before."
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