700r4 Input Shaft/Drum Interchangable to 4l65E Shaft/Drum?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-31-2003, 01:06 AM
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700r4 Input Shaft/Drum Interchangable to 4l65E Shaft/Drum??

I ve heard this rumour and it sounds like a good upgrade, has anyone done this before?? I know the 4L65E have the hardened shaft and drum right from factory. Thanks Fern

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Old 12-31-2003, 07:46 AM
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4l65e input drum

you didn't post what year 700? pre87 700 have orifice style drum (shaft), haven't seen different shaft in those(4l65e) yet but I'll guess it was a upgrade on the drum. the only changes I have noticed was gear train upgrades which have there good and bad points...
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Old 12-31-2003, 08:06 AM
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Cool

It would help to know what year 700r4 or 4L60E? you are talking about.

In 1999 the 4L60E was changed to a longer input shaft & stator support when the converter was redesigned. Late 1998 is when this happened as I recall (dont quote me). The input splines are moved to the end of the shaft where the O-ring was at in the old design.

The spline location, O-ring location , length are all changed on the late 3 piece case 4L60E and the 4L65E. The removable bell housing is a different depth from the early 3 piece case with the old design input shaft.

With that said , I have photos of the splined area of the 4L65E input shaft with the splined area snapped off from a Magna-charged 6.0 motor from a GMC Denali.

The Aluminum drum, I see little difference in the 4L65E stuff

The 5 pinion planets in a 4L65E..... I have seen (2) broken main casting of the rear planets. They show'd no signs of lost lube, so why they broke....... I don't know. The casting does look lighter duty IMHO.

You rarely see a broken 4 pinion front planet of a 700r4 unless the lube was lost. Then the thrust washers on the pinion gears melt out, things move around and tear up stuff.

I have never seen a broken main body of a 4 pinion 'rear' planet. They have been severly beaten , gears completely rounded off from lost lube, but never seen a broken main body of the planet it's self.

I am guessing you want to update an earlier 700r4 (pre-1992?).... the 4L65E shaft will not retro-fit.

IF this link functions, it is a pic of a 4L65E shaft that is broken, it snapped off at the O-ring groove... could be a new problem area in the future? :




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Old 01-01-2004, 05:06 PM
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Broken Input shaft.

I have seen one broken turbine shaft on a 4T45 E broken exactly the same as your picture (at the O ring groove).It turned out to be not heat treated properly. I can't remember what was the reason. If it was a issue in the future you would think it would be around the same build date at least.
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