Blew the trans
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,258
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Blew the trans
I was going to pull the trans on my vette this winter as a preventive measure since I felt it was do a rebuild but it blew at the Freeland, PA car cruise this Saturday. Now I have to decide to rebuild her myself or buy something from one of the trans venders out there, either way I will want to upgrade the trans to hold up to my 383 so any constructive suggestions out there will be appreciated. Oh by the way the trans is a 700R4.
Last edited by eutu1984; Oct 13, 2019 at 08:00 AM. Reason: 700r4
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,258
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
http://www.rosslertrans.com/index.html
IIRC, they can change the first gear to not be so high a ratio?
IIRC, they can change the first gear to not be so high a ratio?
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,258
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
http://www.rosslertrans.com/index.html
IIRC, they can change the first gear to not be so high a ratio?
IIRC, they can change the first gear to not be so high a ratio?
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Sonnax has developed a line of parts for the 700R4/4L60 - E thru 4L7x family of transmissions with the parts retrofitting (with some stipulations)
https://www.sonnax.com/tech_resource...-killer-4l60-e
https://www.sonnax.com/tech_resource...-killer-4l60-e
Safety Car
Joined: May 2001
Posts: 4,759
Likes: 1,647
From: Fairfax Virginia
I had a transmission in our pickup that went bad and nobody could rebuild it locally as parts were getting scarce. I called Monster Transmissions and they shipped me a rebuilt tranny in three days from Florida and they shipped it for free and required no core either. I am not going to say they "always" do good work but on my car they did me a great favor. I checked and they offer several choices based on power produced by the engine.
I took my C4 Corvette to AAMCO when the 700R4 started slipping. I had a bunch of heavy duty parts installed allowing me a 500 hp limit on the transmission. That should be enough for me and it was $1400 roughly for the rebuild and modifications. The best part is that I got to watch them do the transmission and I learned a lot just from that. The main thing I learned is I will never try to rebuild one of these in my driveway. Too many little parts that are vital to the transmission to loos or misplace. The guys at AAMCO had everything laid out on a big bench and had a system to rebuilding the transmission. If you do rebuild it yourself I wish you the very best!
Their prices are reasonable but I know nothing of their warranty service as I never needed it. They start at at $1175 with free shipping for the 700 R4.
Just an option!
Best regards,
Chris
I took my C4 Corvette to AAMCO when the 700R4 started slipping. I had a bunch of heavy duty parts installed allowing me a 500 hp limit on the transmission. That should be enough for me and it was $1400 roughly for the rebuild and modifications. The best part is that I got to watch them do the transmission and I learned a lot just from that. The main thing I learned is I will never try to rebuild one of these in my driveway. Too many little parts that are vital to the transmission to loos or misplace. The guys at AAMCO had everything laid out on a big bench and had a system to rebuilding the transmission. If you do rebuild it yourself I wish you the very best!
Their prices are reasonable but I know nothing of their warranty service as I never needed it. They start at at $1175 with free shipping for the 700 R4.
Just an option!
Best regards,
Chris
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
I would consider changing the first gear in the 700 like mentioned above. It will give you less of an RPM drop on the 1-2 shift, and keep the car in the powerband. This is why I love my 4L80E. The gear ratios are great
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Team Owner
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From: Hartford WI
Wouldn't you need a separate control for the 4L80E or can you use the stock C4’s ECM?
Tech Contributor
Joined: Oct 2008
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From: Custer, WI
Yes that pricing seems accurate with what I have seen before.
What type of build is your 383? are you running an aftermarket intake or are you still running the long tube runner TPI?
The reason I am asking is because the long tube runner makes assloads of torque all over the RPM band and wouldn't suffer as much from large RPM drop after the 1st gear shift.
My 383 had a Holley stealth ram and made great power above 5k RPM. As soon as i shifted the car at 6200, it would dip way down into like 3000 ish some RPM and be out of the power band. With the 4L80, the car would pick right back up around 4200 rpm and keep trucking. The 1st gear in the 4L80E is 2.48. I also have 3.07 rear gear. With a 3200 RPM stall it just goes. The top of 1st gear is 70mph and the top of 2nd is around 110.
What type of build is your 383? are you running an aftermarket intake or are you still running the long tube runner TPI?
The reason I am asking is because the long tube runner makes assloads of torque all over the RPM band and wouldn't suffer as much from large RPM drop after the 1st gear shift.
My 383 had a Holley stealth ram and made great power above 5k RPM. As soon as i shifted the car at 6200, it would dip way down into like 3000 ish some RPM and be out of the power band. With the 4L80, the car would pick right back up around 4200 rpm and keep trucking. The 1st gear in the 4L80E is 2.48. I also have 3.07 rear gear. With a 3200 RPM stall it just goes. The top of 1st gear is 70mph and the top of 2nd is around 110.
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
I am running a mild 383 build with AS&M tpi runners, stock lightly ported 113 heads and a comp cam 264H, I am looking to build the trans I have stronger than it is on a budget so I am not sure how far I will go with it at the moment.
Tech Contributor
Joined: Oct 2008
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From: Custer, WI
If you are trying to get away on a budget spending 700 on one single piece doesn't make much sense.
I think your 383 would still benefit from a 2.84 first gear, but isn't practical if you just drive the car.
I think your 383 would still benefit from a 2.84 first gear, but isn't practical if you just drive the car.
Tech Contributor
Joined: Oct 2008
Posts: 3,729
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From: Custer, WI
I run a unit from TCI and it works well. In hindsight I should have done my entire engine/trans management through Holley
Thread Starter
Drifting
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
I am not much of a drag racer and the car spends a lot of time on the back mountain roads and traveling to events, I will still consider the 2.84 though since the trans will be out, I wonder if anyone has any experience with the 2.84 used with the gears I have in the rear at the moment witch are 3.07's
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
After watching the a video by Monster I believe I will have no problem doing it myself.
special tools will be the biggest problem, I should be able to fab them up myself.
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,258
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
accelerating up a steep grade herd a bank lost all drive gears and reverse, I was able to back it in the garage in reverse by revving the engine in reverse, fluid is nice and red and not burnt my ques is I broke the input shaft or torque convertor, I do not have the trans out yet I will try and work on it next weekend if I don't have to work. I did get it up on jack stands and unbolted the converter. I am having problems with my sciatica so I will do it a little at a time.
Team Owner
Joined: Jul 2004
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From: Hartford WI
IDK. I don't race the car but I would like a 2.84 first gear since that would definitely cut down on the tire spin when I take off. I guess it would make it LESS monitoring the throttle when you take off so it would justify the mod if I were to ever rebuild my trans.
Last edited by aklim; Oct 13, 2019 at 10:34 PM.
Le Mans Master
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From: near the thumb in the mitten
Although not a fan of the 1-2 gear split 700r4 if there's no plan to change out 3.07 I would leave it alone. You just can't manual downshift to 1st going fast. If you are considering changing to a 3.45 + the 2.84 might be worthwhile.