4l60e Build For a Boosted Pig
I've got a 2007 envoy denali that will soon be getting a small-ish btr cam and a TVS 2300 blower on 11-12 psi with e85
it's going to get a stock as stock gets hard parts 4l60e
07 has a factory hardened sun shell...so that's what it'll get
stock planets, stock reaction shaft, stock input/output, etc
I hope to make 500 wheel (all wheel drive) and I put probably 10-12k miles on a year and don't plan to change that even when the blower gets put on.
I think the OP's build list with all the fancy **** will last for a plenty long time if he can get the hydraulics right
I am absolutely not a transmission guy. You guys have al
l helped me learn and build what I've built and fixed, but imo, since it's nearly the same $, to rebuild each diy, I just don't see what the downside is to just building a 80.
But I'm still in for learning more on a 60.
I am absolutely not a transmission guy. You guys have al
l helped me learn and build what I've built and fixed, but imo, since it's nearly the same $, to rebuild each diy, Not even in the same ballpark unless you're using a junkyard 80 for the swap I just don't see what the downside is to just building a 80.
But I'm still in for learning more on a 60.
The $ I spent with Dana, was right around the same to build my 60 vs 80.
You just used a conversion U joint?
2wd is easier than 4wd/awd...because then you have the transfer case to deal with. Input splines, adapter housing, etc
Did you find an early 80e and just reuse your 60e cooler lines?
Flexplate?
Tune/segment swap?
etc
sure it can be done cheap but to be done right there's usually cost involved in the swap
Don't get me wrong. I have nothing against an 80e swap...it's just that a majority of guys have no real need
I did a segment swap, I own HP Tuners, I know not everyone does. I guess I'm probably a little more extreme than most, I do it all myself or with a buddy, building, wiring, tuning, paint and body.
I do very much believe my 60 issues were probably hydraulic related. Building a 60, to me, was much more complicated. I don't know if it was less experience or just the nature of them. I know I didn't like how some of it was designed. I tried my best. I had 2 built by guys, and did 2, and that was over a span of around 5-6 years. My truck only puts down 400 ish @ 3800 at that time.
I do know they should have lived better, but again, I'm looking to see someone who regularly beats on a 500 wheel 60, it's longevity.
Last edited by rpturbo; Jul 1, 2022 at 01:58 PM.
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Frankly there will never be a consensus on the 60 versus 80 swap issues. IMHO, the "cut-off" power limit for the 4L60E/4L65E/4L70E has increased over the years; 20 years ago it was probably 400 HP (or 400 ft/lbs), then 10 years ago a was probably 600 HP and now its approaching 800 HP (technically its Ft/Lbs) which matter). Of course engine power levels have increases similarly. Excellent after-market parts (e.g. Sonnax), pro-builders like Dana and PerformaBuilt, and "secret sharing" from pros like MaroonMonster have certainly made these advancements possible.
I did a segment swap, I own HP Tuners, I know not everyone does. I guess I'm probably a little more extreme than most, I do it all myself or with a buddy, building, wiring, tuning, paint and body.
I do very much believe my 60 issues were probably hydraulic related. Building a 60, to me, was much more complicated. I don't know if it was less experience or just the nature of them. I know I didn't like how some of it was designed. I tried my best. I had 2 built by guys, and did 2, and that was over a span of around 5-6 years. My truck only puts down 400 ish @ 3800 at that time.
I do know they should have lived better, but again, I'm looking to see someone who regularly beats on a 500 wheel 60, it's longevity.
I was also able to vaccum test the valve body. Im intrigued by the results, which has made me realize how important this process is and how often it is probably over looked. From what I understand anything below 15 Hg is a poor reading and needs to be addressed if possible.
With my vaccum testing results I am seriously thinking about blocking the 3-2 shift and control valves. With a low reading of 9Hg I cant help but think blocking it would help get rid of a leak. Are there any down falls for 1st time builder? From what I understand the biggest down fall is potentially having to pull the valvebody to fine tune the orffice sizing for the band release. Is there something im over looking?
As always thanks for everyones input. Im getting rather excited to finish the build to see how it turns out.
The Parts distributors have been pushing "Alabama Bands" for a 2 5/8" Wide High Energy option.
I have never tried one.
The OEM 2 1/4" BW HE Band actually holds up great!
... I have never seen anyone offer a 2 5/8" BW HE Band.
Are you purchasing re-lined bands?
I also have never considered the Raybestos Pro Bands...
15 or so Years ago I experimented with them, and determined that i do NOT like the Kevlar Lining.
You like Kevlar? ...I don't feel it should be in a Transmission.
Last, I have had no issues with Alto (surprisingly... I don't care for their Performance Friction/ Clutch Materials) High Energy (Carbonite) 2 5/8" Bands.

I was also able to vaccum test the valve body. Im intrigued by the results, which has made me realize how important this process is and how often it is probably over looked. From what I understand anything below 15 Hg is a poor reading and needs to be addressed if possible.
With my vaccum testing results I am seriously thinking about blocking the 3-2 shift and control valves. With a low reading of 9Hg I cant help but think blocking it would help get rid of a leak. Are there any down falls for 1st time builder? From what I understand the biggest down fall is potentially having to pull the valvebody to fine tune the orffice sizing for the band release. Is there something im over looking?
As always thanks for everyones input. Im getting rather excited to finish the build to see how it turns out.
My parts came in and here are my current clutch pack clearances:
Low revese clutch
.040 (measures 1.200" from work bench to backing plate.)
Forward
.048
3-4 (4l79 drum)
.040
Reverse
.058
Disreguarding the 3-4, all the clutch pack clearances are about nominal using the ATSG book.
3-2 Control Valve, Outboard Spool/3-2 signal
9
Reverse Abuse Valve, Inboard Spool / Reverse (Line)
22
Reverse Abuse Bore Plug / 3-4 Clutch
17
3-4 Shift Valve, Inboard Spool / Signal A
17
3-4 Shift Valve, Outboard Spool / D3 (Line)
13.5
4-3 Sequence Valve, Inboard Spool / Servo Feed (Line)
19
3-4 Relay Valve, Inboard Spool / Servo Feed (Line)
10
3-4 Relay Valve / 2nd (Line)
12
3-4 Relay Valve, Outboard Spool / 4th Signal
7
TCC Regulator Valve, Isolator Valve / 2nd Clutch, CC Signal
8
TCC Regulator Valve, Balance Spool / Regulated Apply
15
Actuator Feed Limit Valve, Balance Spool / AFL
16
Accumulator Valve / Accumulator
17
2-3 Shift Valve, Inboard Spool / AFL
22
2-3 Shift Valve, 2-3 Shuttle Valve / D2 (Line)
19.5
2-3 Shuttle Valve, Outboard Spool / AFL, Signal B
19
1-2 Shift Valve, Inboard Spool / AFL
20
1-2 Shift Valve, Outboard Spool / D2, 2nd (Line)
20.5
Forward Abuse Bore Plug / PR (Line)
15
Lo Overrun Valve/ Lo/Reverse (Line)
15
I was also able to vaccum test the valve body. Im intrigued by the results, which has made me realize how important this process is and how often it is probably over looked. From what I understand anything below 15 Hg is a poor reading and needs to be addressed if possible.
With my vaccum testing results I am seriously thinking about blocking the 3-2 shift and control valves. With a low reading of 9Hg I cant help but think blocking it would help get rid of a leak. Are there any down falls for 1st time builder? From what I understand the biggest down fall is potentially having to pull the valvebody to fine tune the orffice sizing for the band release. Is there something im over looking?
As always thanks for everyones input. Im getting rather excited to finish the build to see how it turns out.
The Parts distributors have been pushing "Alabama Bands" for a 2 5/8" Wide High Energy option.
I have never tried one.
The OEM 2 1/4" BW HE Band actually holds up great!
... I have never seen anyone offer a 2 5/8" BW HE Band.
Are you purchasing re-lined bands?
I also have never considered the Raybestos Pro Bands...
15 or so Years ago I experimented with them, and determined that i do NOT like the Kevlar Lining.
You like Kevlar? ...I don't feel it should be in a Transmission.
Last, I have had no issues with Alto (surprisingly... I don't care for their Performance Friction/ Clutch Materials) High Energy (Carbonite) 2 5/8" Bands.

I wish I would have known about not using Kevlar years ago. I had a 700r4 built for my 72' K-10 and I ended up choosing a kevlar band for it. Maybe one of these days ill go back through it and apply some of the information Ive learn from the forum.
- Acdelco 12491420
- Transgo Hardened pump rings 700pkh
- 10 vane pump rotor in 13 vane slide
- Sonnax TCC apply valve 77805E-K
- Sonnax oversized PR valve
- Sonnax O ringed .490 boost valve
Inital Vaccum test results:
TCC apply valve
- Upper 18
- Lower 21
Pressure Regualtor
- 18.5
Boost valve
- 15
Final Vaccum test results:
TCC apply valve
- Upper 23
- Lower 24
Pressure Regualtor
- 24
Boost valve
- 23
I decided to ream the PR valve as I had the reamers and figured it would give me an opportunity to see how much change in vaccum I could see. Im pleased with how it turned out. I also took the opportunity to compare the vaccum tests between the Transgo .500 boost valve and the Sonnax O-ringed boost valve. The trangso resulted in 16hg and the Sonnax was 23. This was partly why I choose the Sonnax valve.
Boost valve question:
- From my understanding of the fluid paths of the boost valve, it seems to me the reduced leakage from the O-ringed sonnax valve, could roughly increase line pressure about the same amount as the .010 bigger TG valve. Sonnax uses O-rings to help reduce leakage, and Transgo uses increased diameter to help over come leaks.










