4L80-E swap questions
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
4L80-E swap questions
I am thinking about putting a 4L80 or 4L80-E in my 94 LT1, in place of the 4L60-E. I know it can be done, but what all is involved? I guess I would need a custom tailshaft housing for the C beam to bolt up to. What about the overall size, is there any cutting of the car involved? Would you still use the 6 speed driveshaft and automatic yoke, as with the Dana 36-44 swap? I think John Meaney has a 4L80-E in his twin turbo C4, anybody else? I have been told by several trans builders that it is only a matter of time before the 60 gives up (with over 500 RWHP). It also seems I can get a fully built 80 for the same or less than a built 60. Any help on this would be greatly appreciated.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Custom tailshaft for the custom C beam, custom driveshaft
probably a trans controller for the 4l80e, and maybe a flexible dipstick if the stock one for 4l80 doesnt work
as far as i know, nothing else needs to be done
probably a trans controller for the 4l80e, and maybe a flexible dipstick if the stock one for 4l80 doesnt work
as far as i know, nothing else needs to be done
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
A properly built 4L60 or 700R4 can take a lot of abuse. GM rebuilt mine and I shredded it by hooking it up to a LPE 383 making over 400HP and babying it all the way for 6 months. I went to www.rosslertrans.com, recommended by LPE, and the tranny lasted for 3.5 years with me beating on it several times a day. I drove that Firebird every day there was no snow on the ground and beat the hell out of it.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
There is no such thing as a 4L80 (non E). You say the prices between the 4L80E and the 4L60E are similar? Does that include the core charge for the core you probably don't have? The last *I* heard, the 4L80E cores were still at a premium. On the other hand, the builder of MY 700R4 (4L60) claims it is good for 700+ hp. Most conversions, *I* have read about ran between $4000.00 and $5000.00.
RACE ON!!!
RACE ON!!!
Guest
Posts: n/a
I have a solution for you!!! I copied my post in the for sale section...
4L80E custom trans completely rebuilt,(can handle 1000hp easy)complete with custom ecm(Compushift). Unit has a digital display that shows all trans functions. Allows control of shift points firmness, shift speed, also has built in dyno meter tells you how much HP you are putting throu the tranny, trans temp ...ALL completely controllable..and much much more!. Also has Transgo shift kit which allows manual and auto shifting Dennys Custom aluminum drive shaft 3.5 inch with HD1350 anodized yokes
31 spline input ,heavy duty universals. Protorque 3000 stall speed converter. includes custom bracket to mount the custom C-arm to tranny, also has built in driveshaft safety loop.also custom dipstick tube.
I have alot of time invested is developing this setup .As you know putting a 4L80E in the corvette is not easy. I have $1200 in the control unit. $1200 in trans, $800 in the converter, $1350 in the custom drive shaft and c-arm bracket and bracket. Total $4550.00 ....the parts are brand new mint with 1000 miles.absolutly show quality and spotless, you WILL NOT be dissapointed, Direct fit bolt in and go...will not break. Asking $3500 email - corvettecrap@aol.com
4L80E custom trans completely rebuilt,(can handle 1000hp easy)complete with custom ecm(Compushift). Unit has a digital display that shows all trans functions. Allows control of shift points firmness, shift speed, also has built in dyno meter tells you how much HP you are putting throu the tranny, trans temp ...ALL completely controllable..and much much more!. Also has Transgo shift kit which allows manual and auto shifting Dennys Custom aluminum drive shaft 3.5 inch with HD1350 anodized yokes
31 spline input ,heavy duty universals. Protorque 3000 stall speed converter. includes custom bracket to mount the custom C-arm to tranny, also has built in driveshaft safety loop.also custom dipstick tube.
I have alot of time invested is developing this setup .As you know putting a 4L80E in the corvette is not easy. I have $1200 in the control unit. $1200 in trans, $800 in the converter, $1350 in the custom drive shaft and c-arm bracket and bracket. Total $4550.00 ....the parts are brand new mint with 1000 miles.absolutly show quality and spotless, you WILL NOT be dissapointed, Direct fit bolt in and go...will not break. Asking $3500 email - corvettecrap@aol.com
Racer
Joined: Jul 2001
Posts: 399
Likes: 1
From: Toronto Ontario
Originally Posted by SEEYAAA
I have a solution for you!!! I copied my post in the for sale section...
4L80E custom trans completely rebuilt,(can handle 1000hp easy)complete with custom ecm(Compushift). Unit has a digital display that shows all trans functions. Allows control of shift points firmness, shift speed, also has built in dyno meter tells you how much HP you are putting throu the tranny, trans temp ...ALL completely controllable..and much much more!. Also has Transgo shift kit which allows manual and auto shifting Dennys Custom aluminum drive shaft 3.5 inch with HD1350 anodized yokes
31 spline input ,heavy duty universals. Protorque 3000 stall speed converter. includes custom bracket to mount the custom C-arm to tranny, also has built in driveshaft safety loop.also custom dipstick tube.
I have alot of time invested is developing this setup .As you know putting a 4L80E in the corvette is not easy. I have $1200 in the control unit. $1200 in trans, $800 in the converter, $1350 in the custom drive shaft and c-arm bracket and bracket. Total $4550.00 ....the parts are brand new mint with 1000 miles.absolutly show quality and spotless, you WILL NOT be dissapointed, Direct fit bolt in and go...will not break. Asking $3500 email - corvettecrap@aol.com
4L80E custom trans completely rebuilt,(can handle 1000hp easy)complete with custom ecm(Compushift). Unit has a digital display that shows all trans functions. Allows control of shift points firmness, shift speed, also has built in dyno meter tells you how much HP you are putting throu the tranny, trans temp ...ALL completely controllable..and much much more!. Also has Transgo shift kit which allows manual and auto shifting Dennys Custom aluminum drive shaft 3.5 inch with HD1350 anodized yokes
31 spline input ,heavy duty universals. Protorque 3000 stall speed converter. includes custom bracket to mount the custom C-arm to tranny, also has built in driveshaft safety loop.also custom dipstick tube.
I have alot of time invested is developing this setup .As you know putting a 4L80E in the corvette is not easy. I have $1200 in the control unit. $1200 in trans, $800 in the converter, $1350 in the custom drive shaft and c-arm bracket and bracket. Total $4550.00 ....the parts are brand new mint with 1000 miles.absolutly show quality and spotless, you WILL NOT be dissapointed, Direct fit bolt in and go...will not break. Asking $3500 email - corvettecrap@aol.com
Why did you decide not to go with the 4L80E setup?
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
A couple more questions...
1) on a 94 auto, is there any modification needed to the underside of the body to fit the 80 in there?
2) will I be able to use the factory speedometer (is the signal the same?)
3) what is the 1st gear ratio of the 4L80E? Isn't it like 2.48:1?
How much will that affect acceleration compared to the 3.06 of the 4L60E?
1) on a 94 auto, is there any modification needed to the underside of the body to fit the 80 in there?
2) will I be able to use the factory speedometer (is the signal the same?)
3) what is the 1st gear ratio of the 4L80E? Isn't it like 2.48:1?
How much will that affect acceleration compared to the 3.06 of the 4L60E?
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