4x4 transmissions to mate to 2.5l 4 cylinder ? - S-10 Forum
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post #1 of 5 Old 04-24-2019, 08:55 PM Thread Starter
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4x4 transmissions to mate to 2.5l 4 cylinder ?

I currently have a 5 speed in my 85 s15 and my 3 and 4 gear are going bad. I'm looking for a replacement 4x4 transmission to put it, anyone know of any? Names of transmissions?

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post #2 of 5 Old 04-24-2019, 11:13 PM
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Re: 4x4 transmissions to mate to 2.5l 4 cylinder ?

A 2.8L has the same bellhousing pattern, should work? A T5, I assume.

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post #3 of 5 Old 05-02-2019, 12:27 AM
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Re: 4x4 transmissions to mate to 2.5l 4 cylinder ?

You will need a 4x4 transmission. They don't have a tail shaft housing and bolt directly to the Xfer case.
I think that you can convert a 2x4 to 4x4 by disassembling the tranny and retro fitting the output shaft. Don't quote me though.

MBP is correct. The 2.5 and 2.8 interchange.
BUT.... if you think a 4x4 (5) speed is rare, try finding a 2.5 (5) speed 4x4. There are a few members who have them, but they are about as common as a white deer.

Good luck finding one used. RARE!

S10 addiction:
1)'82 S10, 383, 700R4, Shorty
2) '85 S10, 3.4, 700R4 4x4 stretch cab (Redneck)
3) '90 S10 2.5, 5 speed shorty
4) '91 S10, Built 3.4, 5 speed shorty (Voodoo)
5) '92 S10, 2.5, 5 speed shorty, (Barbie)
6) '92 S10, 2.5 5 speed, Shorty
7) 1979 LUV, Buick 3.8 V6, TH 350 Shorty.
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post #4 of 5 Old 05-02-2019, 12:56 AM
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Re: 4x4 transmissions to mate to 2.5l 4 cylinder ?

Try http://car-part.com/
You might need to make several calls for that one. The yards that list parts on that site rarely keep their inventory up to date. I can usually find what I'm looking for after a half dozen calls or so, more if the part is rare. That site doesn't seem to differentiate which engine, making the list even more difficult to deal with.

The bolt pattern is the same on the Iron Duke and the 2.8L V6, but isn't the starter on the opposite side? Or are they interchangeable? Something in my possibly faulty memory tells me that the bolts will go in, but the starter won't fit properly.

You might be able to use one of the 4.3L V6 ones if you swap bell housing sections.

If you can't light up the tires in the first three gears, you need more power.
If you can light up the tires in the first three gears, you need better tires.
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post #5 of 5 Old 05-02-2019, 02:32 AM
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Re: 4x4 transmissions to mate to 2.5l 4 cylinder ?

The T5 is also not too bad to fix up if the gears aren't tore up and it's just the synchros. I've had my fair share apart, but getting the preload setup correctly is probably the biggest challenge I faced.
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