Performance rebuild kit

[98TransAmWs-6]

I was thinking of rebuilding my 4L60E and I found this performance rebuild kit by Monster Transmissions that is suppose to be good to 650 hp/600 tq. I know most are going to say send it out to get it done, well I want to do it myself. I am planning on doing this when I get a stall. My question is by going by the components is this a good kit or is there a better place to get a kit from? This is what it includes:

Rear Heavy Duty 5 Pinion Planetary
Front Heavy Duty 5 Pinion Planetary
Chrome Transmission Pan with drain plug
Paper Gaskets
O-Rings
Lip Seals
(3) Molded Pistons
Sealing Rings
4L60E Corvette 2nd Gear Servo
4L60E Super Servo 4th Gear Cover
High Performance Steel Kit
High Performance Clutch Kit
4L60E Filter
4L60E Wide High Performance Band
Teflon Pump Bushing
Delco Front Seal Retainer Clip
4L60E Superior Shift Reprogramming Kit Hardened Pump Rings
4L60E 13 Vane Rotor Gear
4L60E 13 Vane Rotor Guide
4L60E 13 Vane High Rev Kit
Heavy Duty "Beast" Sun Shell
Heavy Duty 29 Element Sprag
Heavy Duty Wide Rear Sprag

New Electronics Included

1-2 Shift Solenoid
2-3 Shift Solenoid
Manifold Switch
EPC Motor
3-2 Solenoid
PWM Solenoid
TCC Solenoid with Harness

[98TransAmWs-6]

Anyone know if Monster Transmissions is a reputable company as far as performance rebuild kits?

[383ls6]

My trans just went out so I ordered this same kit for mine. If you read the reviews for them (monster trans) they arent that good but thats for complete trans. The kit should be here next week or so. I will let you know if the parts are junk lol

[2002ssslp]

How much are they asking for the kit ? I do not know very much about this company but I do know there are better kits on the market. Do it right the first time and your trans should last over 100k

[98TransAmWs-6]

How much are they asking for the kit ? I do not know very much about this company but I do know there are better kits on the market. Do it right the first time and your trans should last over 100k

When I last looked it was on sale for $800ish and it was suppose to support up to 650 horsepower. But I have since found a cheaper place to get kits that will support the same or more from: https://www.700r4l60e.com and I was thinking of getting this kit for $725 when I do my transmission rebuild:

Supposedly it will hold 675 fwhp.

"Front pump"
Seal retainer
Late design seal
13-vane rotor with vanes, slide, rotor guide & pin assembly
Trans-Go steel rings & priming spring (over 5,500 rpm)
New replacement stator support with extra wide bushings installed
TransGo .500 boost valve

"Clutches, Steels And Pressure Plates"
4 Borg-Warner reverse/input clutches .078
4 Reverse/input "low drag" Turbulator steels .078
1 Reverse waved steel (eliminates the belleville spring that tears up the inside of the drum)
5 Borg-Warner forward clutches .070
5 Forward steels .090
2 Borg-Warner overrun clutches .078
2 Overrun steels .091
5 Borg-Warner low/reverse clutches .087
5 Low/reverse "low drag" Turbulator steels .068
9 Borg-Warner Hi-Energy 3-4 clutches .065
5 3-4 steels Kolene .060
3 3-4 Steels Kolene .076
1 3-4 pressure plate top .128"
1 3-4 pressure plate bottom .225"
1 3-4 snap ring .062"

Borg Warner dual cage 29 element design
Beast sunshell or GM Heat treated sunshell
Borg-Warner low/reverse roller assembly (late design)
Vamac 3 lip rear seal
Transtech paper & rubber (gasket) kit
Transmission filter (OEM)
Bushings (latest updates, including Teflon front pump & extension)
Thrust washer kit
Sealing ring kit
HD Bearing kit (Timken)
Borg-Warner Hi-Energy 2-4 band
Trans-Go Performance Shift kit w/accumulation for nice part throttle shifts
Modified second accumulator piston, with new "hardened" (RC52) pin, & seal with matching accumulator springs (allows for a smooth 1-2 part throttle shift)
New aluminum 4th accumulator piston
New oem 4th accumulator pin
New Sonnax forward accumulator piston
New steel molded rubber piston for 3-4
HD steel sleeve, modified overrun piston, & modified steel molded rubber forward piston for the input drum

But then there is also this next kit for $958 which is suppose to be good for 750 fwhp which might be more beneficial for my future plans:

"Front pump"
Seal retainer
Late design seal
13-vane rotor with 13-vane slide, vanes, rotor guide & pin assembly
TransGo steel rings & priming spring for over 5,500 rpm WOT shifts
New replacement stator support with extra wide bushing installed in the forward part of the stator and a teflon extra wide bushing installed in the rear of the stator


"Clutches, Steels And Pressure Plates"
4 Borg-Warner reverse/input clutches .078
4 Reverse/input "low drag" Turbulator steels .078
1 Reverse/input waved steel (eliminates the oem belleville spring that tears the inside of the drum up)
5 Borg-Warner forward clutches .070
5 Forward steels .091
2 Borg-Warner overrun clutches .078
2 Overrun steels .091
5 Borg-Warner low/reverse clutches .087
5 Low/reverse "low drag" Turbulator steels .068
10 Borg-Warner Hi-Energy 3-4 clutches .065 ("Exclusive")
9 3-4 steels Kolene .060
1 3-4 top pressure plate .098"
1 3-4 bottom pressure plate .106"
1 3-4 snap ring .062"
1 3-4 apply ring with 5 fingers .060"

Sonnax Overrun 2-3 Shift Valve that will hold the overrun clutches on in D3, helps the WOT 2-3 shift in the "D" position
Sonnax Reverse Abuse valve, plug and spring, helps the WOT 2-3 shift
Borg Warner dual cage 29 element design
Beast sunshell
Borg-Warner low/reverse roller clutch assembly (late design)
Vamac 3 lip rear seal
Transtech paper & rubber (gasket) kit
Transmission filter (OEM)
Bushings (latest updates, including Teflon front pump & extension)
Thrust washer kit
Sealing ring kit
HD Bearing kit (Timken)
TransGo Performance Shift kit, with .500 boost valve and PWM eliminator valve
Aluminum 3-4 piston
HD steel sleeve, overrun piston, & "modified" steel forward piston for the input drum

Alto Extra Wide Red or Carbon 2-4 band with re-enforced anchor supports
Sonnax pinless fourth accumulator piston & special seals with matching accumulator spring
Sonnax pinless forward accumulator piston & seals
Modified second accumulator piston, new "hardened" (RC52) pin, & seal with matching accumulator springs (allows for a smooth 1-2 part throttle shift)
Sonnax 2nd Gear "Super Hold" Servo uses cushion springs (18% more apply area than Corvette servo)
Modified steel cover on 2nd apply servo to fix downshift clunks when in the "D" shifter position
New TransGo separator plate with "hardened" corner plate (predrilled to match your setup)
This kit requires that the reverse/input drum to be in perfect shape, or a new GM drum is a must.
I recommend that you Cryo your output shaft for added durability

I am not sure which to get, the main reason for wanting to support a lot of HP is down the road (about a couple years) I plan on building a 500+ ci stroker with monster torque and hp.

[35th-ANV-SS]

One thing I have learned is that words are cheap. Just because it states it is "supposed" to be good for XXX amount of TQ/HP does not mean it is. My T56 transmission failed at 12,000 miles on stock power. The 3-4 synchronizer keys busted.

How much less expensive is it than other kits that you're able to find more results on?

[98TransAmWs-6]

One thing I have learned is that words are cheap. Just because it states it is "supposed" to be good for XXX amount of TQ/HP does not mean it is. My T56 transmission failed at 12,000 miles on stock power. The 3-4 synchronizer keys busted.

How much less expensive is it than other kits that you're able to find more results on?

About $100+ less expensive. I have read on tech of people using the kits from the link I supplied but no one so far using the monster trans kits. That is the problem, I am unsure of the quality from actual experience.

[35th-ANV-SS]

Yeah, I was referring to the Monster kits, not the more recent link you posted. Just an FYI - since they are not a sponsor, I'll need to remove the link. Only because we DO have a sponsor here for automatic transmission; PerformaBuilt.

[98TransAmWs-6]

Yeah, I was referring to the Monster kits, not the more recent link you posted. Just an FYI - since they are not a sponsor, I'll need to remove the link. Only because we DO have a sponsor here for automatic transmission; PerformaBuilt.

Oh sorry I thought since Performabuilt doesn't sell the kits but the whole trans it would be okay.

[35th-ANV-SS]

You might be right on that. I didn't know they didn't. Never looked at their site since I'm a manual

[383ls6]

ok so i got the monster kit today. IMO all the parts a pretty good quality. they didnt specify the brand of clutches but mine came with kolene steels and red alto frictions. my stock trans already had the vette servo and beefy sunshell but everything else is an upgrade. found a reverse input housing on amazon for 60 bucks. was glad to see other than being worn out the band and reverse input housing was the only damage. here is a pic of the band. well worth the money IMO.

[383ls6]

we will see how long it lasts with 520fwhp/500 fwtq lol

[35th-ANV-SS]

I was reading reviews about Monster transmissions on another forum. Hopefully you have better luck than several other members did! Please keep us posted.

[383ls6]

what kind of problems? the reviews i read were for complete transmissions and they were not good comments. I'm doing this trans myself and just used their parts so unless it's a parts failure it's on me. :-(

[35th-ANV-SS]

I honestly don't recall specifics other than the members needing their transmission rebuilt after 500 miles. Then several other members chimed in complaining they had some issues too.

I just Googled "Monster Transmission Reviews" and there were links to forums about them. You could dig a little deeper than I did to see if it was parts specific.

I would assume a Monster Transmission as a complete kit would have Monster Transmission parts in it though

[383ls6]

k got the trans in today and it shifts amazing. gotta put another 135 miles to break in the yank converter and everything should be good. i cant wait.

[98TransAmWs-6]

k got the trans in today and it shifts amazing. gotta put another 135 miles to break in the yank converter and everything should be good. i cant wait.

Let me know how that goes. I am still trying to decide who to go with for my rebuilt. The decision lies between Monster and Pro Built Automatics.

[383ls6]

the only thing the kit came with that couldve been better was a paper lined band. wish it was a kevlar band

[98TransAmWs-6]

I think I am going to go with Pro Built Automatics. Anyone know where I can get a cryogenic input and output shaft, according to Dana there if I get either a 300M output shaft or a cryogenic one the Trans will be able to handle 800+ fwhp. I found a 300M shaft but it is $600 alone, which is only $300 less than the kit itself.

[35th-ANV-SS]

I would think any reputable transmission shop would have that service available. I know RPM Transmissions, where I got my T56 built, offers that.

PerformaBuilt may also offer it - they are a sponsor.

You can just send in your existing input/output shaft in? Seems like that would be cheaper. Assuming it is not damaged.