1996 4T60-E HD info?

[gpse3400]

I would like to think the amount of clutches is the same... not for nothing, its not the clutches that are issue. All the current failures are pretty much to the left of the rotating assembly. Older issues were the reaction drum, aka stove pipe, that part is way too soft. Early 4th clutch hubs, 3rd roller clutch, and the 2nd clutch drum thrust washer....which was thoughtfully made out of plastic.... I would focus on raising the line pressure and getting a stronger oil pump shaft and bearing.

[IsaacHayes]

Does the 65 use bigger/more clutch packs?

What about putting thicker metal plates between the clutches to tighten it all up? pros/cons?

[3400-95-Modified]

There are some interchange parts, but not many. I know Jeff at EP does a Hybrid setup, BUT he has to machine the 3rd clutch drum to fit in there and do some other stuff... Not sure what else, but I guess he can build one tough 60e using some 65e parts.

[gpse3400]

I would venture to say no they didnt but the aftermarket is to the rescue with a stronger 4T60-E hub. Also I do not think you can use a 4T65E 4th hub in a 4T60-E but I could be wrong. I guess if you used the input sun and if the channel plate and side cover had similar dimensions it would work then... I know the hub itself is different

LS4/ 4T65-E HD

http://www.ls1tech.com/forums/ls4-front-drives-2005-2009/556077-information-ls4-dod-4t65e-hd.html

[IsaacHayes]

Yeah, the 65-E got all kinds of different things in the later years. The LS4 one has cryo treated internals I think....

But anyway back to the 4T60-E, Lorenzo, do you know if the 99 60-E ever got the hardened 4th clutch hub and reverse reaction shell, or do those still need upgrading with hardened aftermarket ones?

Amazingly my original 94 trans has not blown up yet with well over 220,xxx miles but it does feel like it's not grabbing like it used to. I don't drive it easy either.

[gpse3400]

I'd like to think you can make it work, amuch later model gear box will have all the latest hard parts. My main concern is the 3rd and input diodes which I think is actually a racheting device now and not a sprag.

The LS4 4T65-E HD I know has even more done to it than a 3800SC gear box.

[IsaacHayes]

http://home.att.net/~subzero350/1996_4T60-E.pdf

[3400-95-Modified]

Yeah I'm thinking they are only 96 versions of the 60e that were HD.

[robertisaar]

think the different trannys got different RPO codes?

[IsaacHayes]

JimmyFloyd, according to the charts from GM, the only year was 96.........

Did the pan on the bottom say 4T60-E-HD ?

Jon, I'm pretty sure that 96 was the only HD year, with the 240/280 hp/tq SII L67.

There is bad info I believe out on the internet (gasp) that 91-95 had HD if you had a supercharged or 4.9L V8... When I believe it's ONLY 96 that got the HD.

[3400-95-Modified]

92-95 low roller sprags are the devil... which means so are the final drive rings that determine which sprag you need to run

I like the 96+ setups because they were designed much better.

The 96 HD's were the forward cut fine pitch 3.29, so you can't use a HD diff in a 95 and older trans without changing the final drive ring and all other related components. My book lists the HD's for 96, but it does not list any for 91-95... I wonder if they were not HD versions.

[Jimmyfloyd]

Yeah if it's only the diff it's not worth the hassle...

And the 60-e HD is only in 96 cars with a 3.8 series II super charged...

That's the only year it was available with the Series 2, it was available with the Series 1 L67 in 92-95. I've had three of them already (93 Bonneville SSEi's)

[IsaacHayes]

Yeah if it's only the diff it's not worth the hassle...

And the 60-e HD is only in 96 cars with a 3.8 series II super charged...

[robertisaar]

OBDII is the devil I tell ya

[3400-95-Modified]

97 ecm's control 4t60e's as well, and IIRC they can be controlled all the way up to 99, or further. The 4t60e and 65e had very similar controls and the only big wiring differences were the wires for the pressure controls in the 65e, that was done by vac in the 60e. I could take my 97 ECM and control a 65e if I wanted to, but I would have to wire in one circuit to the trans, since my harness does not have that. For a newer ecm to control an older trans you just need to zero out the shift pressure and shift time tables.

And if I've been told correctly the only differences between the HD and LD versions is the diff. I'm assuming its the same as the 65e, because you can make a 65e a HD version by simply changing the diff and diff cover. Also if you have a LSD and your not doing peg leg burnouts, you probably will not break the current LD diff.

OBDII is the devil I tell ya