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Old 03-16-2012, 02:38 PM
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Default 93 s10 blazer no 3rd or 4th gear

hey fellas, gals...got a 93 auto 4x4 blazer won't go into 3rd or 4th any hope or it it time for r&r thanks in advance...o btw what tranny in this truck?
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Old 03-16-2012, 11:40 PM
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Since your truck is a 1993 it should have the 4L60E which is the electronically-controlled version of the good ol' THM 700R4. To be sure, check the stamping on the right side of the transmission case at the bellhousing. It should say M30. That should verify it.
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Old 03-17-2012, 03:36 PM
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If there is wires plugging into the side of it, you have a 4L60E transmission. If there is no wire bundle, then its a 700R4 (doubtful that the previous owner swapped trannys)

Most tranny shops will let you cash and carry a rebuilt for $1000 cashola... Thats a good deal. You could try your luck with a junkyard trans but you might just get one thats no better than the one you are pulling.

If your fluid is burned smelling and very dark, then my first guess would be 3-4 clutch pack failure - requires a rebuild to repair.

Unplug your wire plug on the side of the transmission (or pull TRNS fuse), start the truck and put it in gear - can you drive it? I say this cause I think it starts out in 3rd gear by default when electrical connection is lost (which you force by unpluging or pulling the fuse). If you have no movement and it just revs up, then your clutches are toast and its time for the R+R. If it will drive, then your 3-4 servos are causing the problem, they are about 20 bucks and can be changed on the side of trans with it in the vehicle.

Go unplug that wire and report back to us with your findings.

Theres a few guys around here that know these trannys inside out, just give it a couple days and they will chime in with some help.
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Last edited by ohsofly; 03-17-2012 at 03:40 PM.
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Old 03-28-2012, 06:27 PM
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Is your speedometer working ? If its not then its the vehicle speed sensor .
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Old 03-28-2012, 06:27 PM
 
 
 
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1993, 2000, 2007, 2nd, 3rd, 4l60e, 4th, blazer, change, failing, gear, mo, s10, selector, shift, silverado, starts, wont


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