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4L60E rebuiding advice

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Old Nov 24, 2003 | 02:49 AM
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Default 4L60E rebuiding advice

Ok...I think the tranny in my 1/2 ton is slowly headed south and I've only got 3k more miles while it is still under warantee. It takes it about 1-2 full seconds to make the 1-2 shift over 75% throttle, with or without TQM. I know the service manager at a local dealership and I think they will probably just rebuild it under warantee. Now he did say that if I wanted to change anything, if I got the parts they would do it. No biggie I guess.

I really don't know what I'm going to do with it right now. If they just replace it then I'll take the new one and just drive it for a while and have a shop put the servo's and shift kit in it. If they do end up rebuilding it instead of replacing it. What all parts should I get and where should I get them from?

Auto's are still a mystery to me...I'm a much bigger fan of the manual boxes.

I know a few of you guys have had them built, rebuild them yourself, or just bought new ones. What are your thoughts and ideas so it won't go out again?

Is the only difference between the truck and car tranny's the servos? Or are they still changing pumps and other items like that?
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Old Nov 24, 2003 | 08:50 AM
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Originally Posted by 1LEThumper
What all parts should I get and where should I get them from?

Auto's are still a mystery to me...I'm a much bigger fan of the manual boxes.

I know a few of you guys have had them built, rebuild them yourself, or just bought new ones. What are your thoughts and ideas so it won't go out again?

Is the only difference between the truck and car tranny's the servos? Or are they still changing pumps and other items like that?
The valvebody hardware calibration (springs, valves, spacer plate orifices) is different between your truck and an F-car trans. Depending on how stock your truck is (?) and how much shift harshness you can handle, I would focus on a corvette-type 2/4 servo and maybe the 5-pinion planetaries. If your dealer will do "aftermarket", opt for a good shift kit.
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Old Nov 24, 2003 | 10:06 PM
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Currently the truck is pretty much stock, and I don't plan on much maybe a small cam and some long tubes.

I just want something that doesn't feel like a slush box and it can hold up to some beating on it from time to time and can tow the Camaro a couple weekends out of the year.
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Old Nov 25, 2003 | 10:22 AM
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Originally Posted by BAD APPLE
The valvebody hardware calibration (springs, valves, spacer plate orifices) is different between your truck and an F-car trans. Depending on how stock your truck is (?) and how much shift harshness you can handle, I would focus on a corvette-type 2/4 servo and maybe the 5-pinion planetaries. If your dealer will do "aftermarket", opt for a good shift kit.
5 pinion planetarys on a stock truck suppose you think he should have them cryoed too not flaming you, nor am I a transmission engineer dood but wow

Most warrantee work will be replacement with stock assemblys, and due to the fact that the guy working at the dealership might overlook something while installing your aftermarket parts(due to the fact he or she is used to the old in and out). worst case the dealer then voids warrentee due to non stock replacement parts as your trans begins to fail 10 miles down the road after the rebuild.
Go stock from the dealer, then find a reputable speed shop to do custom work later. Thats just my 2 cents, good luck

Last edited by jstpsi; Nov 25, 2003 at 10:38 AM.
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Old Nov 25, 2003 | 10:45 AM
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Originally Posted by 1LEThumper
Currently the truck is pretty much stock, and I don't plan on much maybe a small cam and some long tubes.

I just want something that doesn't feel like a slush box and it can hold up to some beating on it from time to time and can tow the Camaro a couple weekends out of the year.
More over I have a 97 yukon gt with the 4L60e, with almost 100k on it besides swapping out the transfercase I threw in a B&M shift improver, and an extra fluid cooler in front of the radiator with regular fluid changes. Its pulled its fair share, and has trucked its way out west a few times. I am still very happy with the way it shifts and downshifts just right. I still have to remind myself there is a 10 bolt out back when i copycat 97m6formula's dry pavement 180s but what the hell
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Old Nov 25, 2003 | 04:42 PM
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Originally Posted by jstpsi
5 pinion planetarys on a stock truck suppose you think he should have them cryoed too not flaming you, nor am I a transmission engineer dood but wow

Most warrantee work will be replacement with stock assemblys, and due to the fact that the guy working at the dealership might overlook something while installing your aftermarket parts(due to the fact he or she is used to the old in and out). worst case the dealer then voids warrentee due to non stock replacement parts as your trans begins to fail 10 miles down the road after the rebuild.
Go stock from the dealer, then find a reputable speed shop to do custom work later. Thats just my 2 cents, good luck

Why not have them cryogenically tempered? It's amazingly cheap and it works.I say always build it better than you think you'll need it. Especially if you can afford it.
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Old Nov 25, 2003 | 04:49 PM
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Put a tranny cooler on there.

I don't think your dealer dude will let you put fancy stuff in there.
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Old Nov 25, 2003 | 09:50 PM
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Originally Posted by Pro Stock John
Put a tranny cooler on there.

I don't think your dealer dude will let you put fancy stuff in there.
There are still a few cool dealer techs out there
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Old Nov 25, 2003 | 11:12 PM
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Originally Posted by Pete2k_Z28
There are still a few cool dealer techs out there
Agreed! all credit to every blue collar out there, as I am one myself. Especially those poor soles doing warranty work on the blue ovals. However the fact of the matter is, after market parts void warrantee's and heres a tip, the cool techs arnt the ones who make the decision to charge the customer full price who should still have a full warrantee on there new trans considering the clutches are enguaged faster than they were in stock form making them last longer. Its the guy signing checks who doesnt give a
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