700R4 HP Limit
Instructor
Joined: Oct 2002
Posts: 213
Likes: 0
From: Choudrant LA
Well I don't have any personal experience, but the last time I submitted a thread like this, the general concensus was around 300....and that was pushing it. They can't handle much. They weren't able to handle much past headers and all the freebies....
Instructor
Joined: Dec 2004
Posts: 142
Likes: 0
Thats really a weighted question. It depends on what shape, mileage, etc of the transmission. Has it been rebuilt? If so what was done if anything to beef it up.
We have a 700r4 running behind a 370hp 350 with a 100hp shot of nitrous on top of that. The transmission was rebuilt locally buy a reputable shop.
For my truck, I will be getting a 700r4 from Bowtie Overdrives warrantied up to 650hp.
We have a 700r4 running behind a 370hp 350 with a 100hp shot of nitrous on top of that. The transmission was rebuilt locally buy a reputable shop.
For my truck, I will be getting a 700r4 from Bowtie Overdrives warrantied up to 650hp.
Instructor
Joined: Oct 2002
Posts: 213
Likes: 0
From: Choudrant LA
Originally Posted by siggy_freud
Thats really a weighted question. It depends on what shape, mileage, etc of the transmission. Has it been rebuilt? If so what was done if anything to beef it up.
We have a 700r4 running behind a 370hp 350 with a 100hp shot of nitrous on top of that. The transmission was rebuilt locally buy a reputable shop.
For my truck, I will be getting a 700r4 from Bowtie Overdrives warrantied up to 650hp.
We have a 700r4 running behind a 370hp 350 with a 100hp shot of nitrous on top of that. The transmission was rebuilt locally buy a reputable shop.
For my truck, I will be getting a 700r4 from Bowtie Overdrives warrantied up to 650hp.
Team Owner
Joined: Sep 2001
Posts: 62,146
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
First off, people must remember that HP doesnt break anything, torque does.
2nd, there is no concrete limit to the amount of torque that your transmission (or your D36) can handle.
Both will blow when they damn well please, it may handle 500 CTq for 10000 passes, or it may go at 350 CTq after 1 pass. There is no telling when it will happen, or what will break first.
Only thing you can do is change the fluid regularly with a good synthetic, and have an external transmission cooler installed, because the #1 enemy of an automatic is heat. Rebuilds that entail both hard and soft-part upgrades are the ones that will last the longest.
2nd, there is no concrete limit to the amount of torque that your transmission (or your D36) can handle.
Both will blow when they damn well please, it may handle 500 CTq for 10000 passes, or it may go at 350 CTq after 1 pass. There is no telling when it will happen, or what will break first.
Only thing you can do is change the fluid regularly with a good synthetic, and have an external transmission cooler installed, because the #1 enemy of an automatic is heat. Rebuilds that entail both hard and soft-part upgrades are the ones that will last the longest.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Actually torque is the issue, more so than HP. And whether it's handling stock or enhanced power, how it's used (or abused) and maintained will obviously affect it's longevity. Adding a suitable cooler will make any A/T last longer, too.
Boy was I slow typing this!
Boy was I slow typing this!
Last edited by Corvette Kid; Dec 9, 2005 at 11:17 PM.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Originally Posted by eric_daniel
I was referring to a straight stock 700r4. even with a rebuild probably wouldn't be MUCH different if stock parts were used. But again, I'm just repeating what was told to me. I have no direct experience. Mine's been rebuilt but no more hp....
Originally Posted by vader86
First off, people must remember that HP doesnt break anything, torque does.
2nd, there is no concrete limit to the amount of torque that your transmission (or your D36) can handle.
Both will blow when they damn well please, it may handle 500 CTq for 10000 passes, or it may go at 350 CTq after 1 pass. There is no telling when it will happen, or what will break first.
Only thing you can do is change the fluid regularly with a good synthetic, and have an external transmission cooler installed, because the #1 enemy of an automatic is heat. Rebuilds that entail both hard and soft-part upgrades are the ones that will last the longest.
2nd, there is no concrete limit to the amount of torque that your transmission (or your D36) can handle.
Both will blow when they damn well please, it may handle 500 CTq for 10000 passes, or it may go at 350 CTq after 1 pass. There is no telling when it will happen, or what will break first.
Only thing you can do is change the fluid regularly with a good synthetic, and have an external transmission cooler installed, because the #1 enemy of an automatic is heat. Rebuilds that entail both hard and soft-part upgrades are the ones that will last the longest.
Originally Posted by Corvette Kid NC
Actually torque is the issue, more so than HP. And whether it's handling stock or enhanced power, how it's used (or abused) and maintained will obviously affect it's longevity. Adding a suitable cooler will make any A/T last longer, too.
Boy was I slow typing this!
Boy was I slow typing this!
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Originally Posted by Casethecorvetteman
Looking at your avitar if indeed that is you, this is a major cause of heat build up, and as stated, heat is not good for them.
As they said
As they said
Actually they aren't as bad as people think.. I've got one car that runs low 11's for a few years on one and a few others running quite well on them. Low 11's isn't that impressive but considering hes been doing it for a few years now is.
Finding the right builder is the key.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Originally Posted by Alvin
Actually they aren't as bad as people think.. I've got one car that runs low 11's for a few years on one and a few others running quite well on them. Low 11's isn't that impressive but considering hes been doing it for a few years now is.
Finding the right builder is the key.
Finding the right builder is the key.
They are a bloody good box i reckon, and it all comes down to who builds it as to how good it be.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I had my 86 700R4 Vigalante TQ converter 3000 stall with a trans go kit installed,behind an L98 with a 125 shot of nitrous.
I took it down to a 1.59 60' until the nitrous leaked into the plenum.You know what that result is
I have a 4L60E stock in my 94 LT1 that took a 125 shot for a year before it blew high gear,1st and 2nd still worked.With datamaster recorded 538 hp Broke left front shock and motor mount ,the next race the trans blew.The 94 now has a trans go kit and an S-10 converter.
I run both cars twice a month,about 10 runs on Friday and about 3 to 8 runs on Saturday.
The cars run in the 11's at about 122 mph give or take 3 miles an hour.
Just to mention the 86 has a D44 3.33 and the 94 has a D36 3.07 best 60' 1.63,nitrous on the 94 never shot off the line.
The 86 nitrous shot right off the line every time.
I took it down to a 1.59 60' until the nitrous leaked into the plenum.You know what that result is
I have a 4L60E stock in my 94 LT1 that took a 125 shot for a year before it blew high gear,1st and 2nd still worked.With datamaster recorded 538 hp Broke left front shock and motor mount ,the next race the trans blew.The 94 now has a trans go kit and an S-10 converter.
I run both cars twice a month,about 10 runs on Friday and about 3 to 8 runs on Saturday.
The cars run in the 11's at about 122 mph give or take 3 miles an hour.
Just to mention the 86 has a D44 3.33 and the 94 has a D36 3.07 best 60' 1.63,nitrous on the 94 never shot off the line.
The 86 nitrous shot right off the line every time.
Melting Slicks
Joined: Oct 2003
Posts: 2,951
Likes: 3
From: Mount Vernon OH
Transmission
Keep in mind that the lighter your car is the easier your car will be on parts including your transmission. I have friends who have gone deep into the 10's with the 700 trans.
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
Some of you guys may have known Shalin. His 355LT1 Vortech 555rwhp and 530 some tq. His built 700r4 tranny have never break on him. He beats the living craps out of it in the 1/4 mile track almost weekly. Car ran best 10.6 @ 128mph on nitto tires. I would guess the tranny is at it Maximum strenght with that hp level on a 700r4.
Last edited by Bruce; Dec 10, 2005 at 05:00 PM.
