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Old 10-18-2007, 01:46 PM
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1995 gmc 2500 4L80E

hey guys I cant find a used 95 80e trans around close for sale. parts supplies say only 95 works on this 2500 with 5.7 will a 97 4L80E interchange and what do i have to change

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Old 10-18-2007, 04:21 PM
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Don't see why not. As long as the tranny comes from behind a traditional small block (not the LSx based engines) you should be fine. There might have been a slight difference with an electrical plug or something, but the trannys should be interchangeable
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Old 10-18-2007, 09:43 PM
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1995 gmc 2500

guy had one out of motor home prob. big block 454 had 11,000 miles wish it would work for $650
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Old 10-18-2007, 11:50 PM
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It should work just fine. No difference between bbc and sbc trannys
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Old 10-19-2007, 06:30 AM
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there is a bit more to check out than bolting up to the engine..


check the shifter linkage arm length.... the 97 will have a long arm because the MLPS is bolted to the case.

Cooler line connections are different. The 1997 is a center lube design trans. One cooler (pressure OUT) line at the bell housing area.... second cooler (RETURN!) line towards the rear of the case......There is a Sonnax conversion kit that makes this easy. Hooked up incorrectly will equal a smoked trans gear train.

These are "clip on - snap in " style cooler fittings they can NOT Be changed. The rear cooler fitting is a longer design to fit into the trans case deeper for proper lube. There are adapters available to use a thread on style cooler fitting design

Check the electrical connector.... there is an early and late design. The 1995 should have the late design too ....Early design has a screw in the center of the plug on the vehicle side of harness.... check it
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Old 10-19-2007, 12:10 PM
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whew... I love it when Crosley saves the day with way more information than I can retain
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Old 10-19-2007, 05:03 PM
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great info

thanks guys, looks like i 'll buy me a trans. my trans shop probably knows all that but i like knowing myself .i pulled old one put in seals but pump is spraying like heartbeat. trucks got 285k on it motor runs ok maybe 1 qt. oil 6or7 weeks hard driving.
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