Hot Rod Forum banner

4L60e trans. Rebuild.

2435 Views 47 Replies 7 Participants Last post by  Cameronluster
About to rebuild my trans in my 97 Silverado. I’m looking at all the kits on summit and just had a few questions.

What are the pros and cons to the corvette servo?
Any recommended kits any of you have used?
Also what should I look for in the kits to make the trans stronger than it was from factory?
1 - 20 of 48 Posts

· 1949 Ford Coupe RESURRECTION
Joined
·
1,237 Posts
Servo = Sonnax 2-4 full servo kit..both pieces, 10 o-rings, the best there is.
get Steel pressure plates to replace aluminums if that's what is in there now.
Sonnax 0.500 pressure valve in the pump.
Transgo kits are good. investigate various versions.
Watch the series of videos on TransmissionBench.com... very good coverage.. I set up my phone on a stand while reassembling so I could review each chapter while putting it back together.
Inspect EACH part very carefully when disassembling. If any doubt about integrity, get a new one, particularly your planetary gears. (ask me how I know)
Watch as many YouTubes as you can on the subject, too.

I have three chapters on my website that address the rebuilding of my 700R4, which, when it comes to the drivetrain, is pretty much identical to a 4L60E (but not the controls). . scroll down to appropriate gallery, this is the home page..Good LUCK !

 

· Registered
Joined
·
16,340 Posts
Corvette servo has over 50% more surface area so it applies that much more force to the 2-4 band.

Typically these performance rebuild kits replace the items that the stock 700R4 through 4L60E’s are known to be inadequate for heavy duty and performance work.

That said GM constantly has put upgrades into these transmissions so not all upgrades are needed all of the time.

The cons to the Corvette servo is the shift on 2nd and 4th will be more feel-able in your butt. Opposite of GM’s long standing desire for imperceptible shifts.

Bogie
 

· Registered
Joined
·
265 Posts
Discussion Starter · #5 ·
Corvette servo has over 50% more surface area so it applies that much more force to the 2-4 band.

Typically these performance rebuild kits replace the items that the stock 700R4 through 4L60E’s are known to be inadequate for heavy duty and performance work.

That said GM constantly has put upgrades into these transmissions so not all upgrades are needed all of the time.

The cons to the Corvette servo is the shift on 2nd and 4th will be more feel-able in your butt. Opposite of GM’s long standing desire for imperceptible shifts.

Bogie
[/QUOTE
Corvette servo has over 50% more surface area so it applies that much more force to the 2-4 band.

Typically these performance rebuild kits replace the items that the stock 700R4 through 4L60E’s are known to be inadequate for heavy duty and performance work.

That said GM constantly has put upgrades into these transmissions so not all upgrades are needed all of the time.

The cons to the Corvette servo is the shift on 2nd and 4th will be more feel-able in your butt. Opposite of GM’s long standing desire for imperceptible shifts.

Bogie
what about these two kits from summit? They seem to have good reviews and I tune the only difference is the included servo. What is your opinion on these?
 

Attachments

· Administrator
Joined
·
10,432 Posts

· Administrator
Joined
·
10,432 Posts
When you press the sleeve onto the drum,you line up the notch with the apply hole leaving the apply path open. You can see the notch on the instruction sheet.
It appears Sonnax altered the design of the sleeve. Which is a good thing. The 3 stand offs could damage the aluminum drum if pressed on too far.
 

· Administrator
Joined
·
10,432 Posts
Your 1997 Siverado should have a deep pan ? Truck pan if it is oem design truck pan.. . You need the correct filter. Or, perhaps there is an aftermarket pan on this trans?
 

· Registered
Joined
·
142 Posts
what about these two kits from summit? They seem to have good reviews and I tune the only difference is the included servo. What is your opinion on these? View attachment 627704
You should take the trans apart and see what you need before ordering parts.There we’re some differences in these transmissions like moulded pistons and filters like Crosley said.Those kits you show are pretty incomplete for a HD build.
 

· Registered
Joined
·
265 Posts
Discussion Starter · #15 ·
You should take the trans apart and see what you need before ordering parts.There we’re some differences in these transmissions like moulded pistons and filters like Crosley said.Those kits you show are pretty incomplete for a HD build.
It’s just a normal stock trans. I just want a kit with some good durable parts so it will last longer than this one did.
 

· Rod...from a Chrysler?
Joined
·
10,197 Posts

· Registered
Joined
·
265 Posts
Discussion Starter · #17 ·
Servo = Sonnax 2-4 full servo kit..both pieces, 10 o-rings, the best there is.
get Steel pressure plates to replace aluminums if that's what is in there now.
Sonnax 0.500 pressure valve in the pump.
Transgo kits are good. investigate various versions.
Watch the series of videos on TransmissionBench.com... very good coverage.. I set up my phone on a stand while reassembling so I could review each chapter while putting it back together.
Inspect EACH part very carefully when disassembling. If any doubt about integrity, get a new one, particularly your planetary gears. (ask me how I know)
Watch as many YouTubes as you can on the subject, too.

I have three chapters on my website that address the rebuilding of my 700R4, which, when it comes to the drivetrain, is pretty much identical to a 4L60E (but not the controls). . scroll down to appropriate gallery, this is the home page..Good LUCK !

Are the kits on that site quality kits like some on summit?
 

· 1949 Ford Coupe RESURRECTION
Joined
·
1,237 Posts
Just do what 3w coupe says. But the kits are not going to have specialty items that will improve performance such as the sonnax items that I mentioned above..

And watch those videos on transmissionbench.com plus all the related videos on YouTube that you've got time to watch before you tear it all apart.. save the links so that you can quickly check back and follow those as you are putting it back together.
 

· Registered
Joined
·
265 Posts
Discussion Starter · #20 ·
Font Jewellery Fashion accessory Art Metal
Font Parallel Number Paper Document
What about this kit? What does everyone think? Rigid Axel always seems to have good stuff. It’s a beefed up kit so help the 4L60E be more durable. But it’s doesn’t have the Kolene steels. And I’ll still need to get the sonnax sunshell. But what is everyone’s opinion?
 
1 - 20 of 48 Posts
Top