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Old 10-20-2007, 01:27 AM
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4l60e Trans.

I was wondering if a 4l60e transmission from a 96 GMC is built with better parts than a GMC 93 4l60e trans what I mean is like the parts that are always' shelling out on a 93 4l60e tansmission the same on a 96 model or were they corrected with beefy parts?
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Old 10-20-2007, 08:11 AM
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Quote:
Originally Posted by GMCTRUCKS
I was wondering if a 4l60e transmission from a 96 GMC is built with better parts than a GMC 93 4l60e trans what I mean is like the parts that are always' shelling out on a 93 4l60e tansmission the same on a 96 model or were they corrected with beefy parts?
Thanks! GMCTRUCKS

not really any changes in basic hard parts
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Old 10-20-2007, 03:33 PM
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The big upgrades didn't happen until 98 when they started calling them the 4L65E. That name never really caught on, though. Its still called a 4L60E
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Old 10-20-2007, 03:43 PM
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Quote:
Originally Posted by curtis73
The big upgrades didn't happen until 98 when they started calling them the 4L65E. That name never really caught on, though. Its still called a 4L60E

that is interesting since the earliest use I know of a 4L65E was in a AWD application with a 6.0 liter V-8 in the 2001 Denali GMC.

The L65E upgrades included 5 pinion planetary units, input shaft, out put shaft , 3-4 clutch count.

There is also a 4L70E trans , seems like I read about a 4L75E too.

GM also introduced a new 2nd gear servo size... in between the vette size servo and regular #553 servo size used on V-8 & 4.3 V-6.
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Old 10-20-2007, 06:18 PM
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if anything thay made them worse with those stupid plastic accumulator pistons
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Old 10-20-2007, 06:37 PM
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Quote:
Originally Posted by performabuilt2
if anything thay made them worse with those stupid plastic accumulator pistons

Photo of plastic piston from a 2002 truck with 4k miles on it next an aluminum piston...


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Old 10-20-2007, 06:39 PM
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there ya go just like the 3.1 lower intake manifolds always broken
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Old 10-20-2007, 07:46 PM
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Quote:
Originally Posted by Crosley
that is interesting since the earliest use I know of a 4L65E was in a AWD application with a 6.0 liter V-8 in the 2001 Denali GMC.

The L65E upgrades included 5 pinion planetary units, input shaft, out put shaft , 3-4 clutch count.
You may be right, you are much more in the know than I am. I just started hearing all 4L60E's being referred to L65s in 98 when they went with the removable (shorter) LS-style bellhousing and the 5-pin planet. I've seen a few, and installed a few 98-2001 cars that fit the L65 description, but I have rarely been correct on tranny info when you're involved in the conversation I do know that many of us Impala SS guys looking for upgrades to our L60s turn to 98 and later LS-trannys for the 5-pin planet.
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Old 10-21-2007, 11:00 AM
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4k60e

Thanks guys for the answers.
Have a Great Week! GNCTRUCKS
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Old 10-21-2007, 11:25 AM
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If anyone needs it I've got a recommended parts upgrade list for the 4L60E. I'll be using it to build one soon. It was compiled by a specialist who builds these and 700Rs for quite a few folks and with great success. He gave me this list for my specific needs and he says it should be quite adequate for my engine, which makes around 500 lb-ft of torque at the crank.
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Old 10-21-2007, 12:43 PM
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Quote:
Originally Posted by Crosley
Photo of plastic piston from a 2002 truck with 4k miles on it next an aluminum piston...


How does crap like this happen?
Doesn't GM thoroughly test designs like this before putting them into production?
GEEZZ!
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Old 10-21-2007, 01:39 PM
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Sure they test them. The engineers and designers spend years and millions testing them, then the accountants and executives decide that a plastic part saves 64 cents per assembly and only raises warranty claims 12%, so its a valid change.

Trust me, I worked for YEARS as an engineer for 4 different car companies. The actual amount of our great ideas that make it to production are very few. Some marques are better than others. Some are like McDonalds; use grade F parts that barely qualify long enough to stave off warranty claims, others are like a fine steak house. You pay for it, but the quality is obvious and the prices reflect that.
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