Dropmember LS Swap Help... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JNJchev77 · 08-21-2012, 12:09 AM

Hey guys,

Specs.... 77 SWB, 5.3, Dropmember

I'm thinking of switching tranny's from a 700r4 to a 4l80e trans with my 5.3 Swap with DM. Seems to be the better way to go. No TV cable problems, better gearing imo, stronger trans all together...

My question is how is the fitment? Will I have to trim the firewall or front of the cab floor? I just finished the cab tunnel for the 700r, of course, and was presented with a good deal on a trans. I have the "high hump" trans cover, and had to trim a little off the front of the cab, but hoping I don't have to take anymore off. Is the 4l80e that much bigger than the 700r?? My tunnel should clear, I'm more concerned with the front where the trans bolts to the motor...

**lolife99** · 08-21-2012, 07:45 AM

Anyone?

JNJchev77 · 08-21-2012, 11:37 AM

I know there has to be a few guys that have the swap with a Dropmember. I looked for the dimensions, but couldn't find what I was looking for....

JNJchev77 · 08-21-2012, 01:08 PM

Here's a couple pics, maybe that will spark some answers...?

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PBFAB.COM · 08-21-2012, 04:17 PM

The 4L80 e is much larger than the 4L60 and you will need to modify the floor pan/trans cover for clearance.

If you aren't planning on putting down huge horsepower I would recommend sticking with the smaller 4L60e.

Nate

JNJchev77 · 08-21-2012, 04:51 PM

Thanks Nate!

I have my floor pan "tunneled" and "clearanced" the trans cover, but didn't realize the 4l80e was that much bigger and was built a little more, I don't really need the beefed up trans. I'm only going to be running about 350hp.

Justin

Pro Performance · 08-21-2012, 06:16 PM

The 4L80 is also longer as well, so you would need to modify your drive shaft.

JNJchev77 · 08-21-2012, 06:46 PM

I did find that measurement

, so I was planning on that. Was just concerned about the lower firewall.

The 4l60e is basically the 700r4 but electronic and... newer/stronger? If I go with the 2000+ version?

andrewmp6 · 08-22-2012, 02:15 AM

Worse case you can have the 4l60 beefed up if you want more power.Yeah i think the 4l60 is just a 700r4 updated.

08-21-2012, 12:09 AM	#1
JNJchev77 Registered Cruiser Join Date: Mar 2010 Location: Mesa, AZ Posts: 918	Dropmember LS Swap Help... Hey guys, Specs.... 77 SWB, 5.3, Dropmember I'm thinking of switching tranny's from a 700r4 to a 4l80e trans with my 5.3 Swap with DM. Seems to be the better way to go. No TV cable problems, better gearing imo, stronger trans all together... My question is how is the fitment? Will I have to trim the firewall or front of the cab floor? I just finished the cab tunnel for the 700r, of course, and was presented with a good deal on a trans. I have the "high hump" trans cover, and had to trim a little off the front of the cab, but hoping I don't have to take anymore off. Is the 4l80e that much bigger than the 700r?? My tunnel should clear, I'm more concerned with the front where the trans bolts to the motor... __________________ 77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo

08-21-2012, 07:45 AM	#2
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: Dropmember LS Swap Help... Anyone? __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

08-21-2012, 11:37 AM	#3
JNJchev77 Registered Cruiser Join Date: Mar 2010 Location: Mesa, AZ Posts: 918	Re: Dropmember LS Swap Help... I know there has to be a few guys that have the swap with a Dropmember. I looked for the dimensions, but couldn't find what I was looking for.... __________________ 77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo

08-21-2012, 01:08 PM	#4
JNJchev77 Registered Cruiser Join Date: Mar 2010 Location: Mesa, AZ Posts: 918	Re: Dropmember LS Swap Help... Here's a couple pics, maybe that will spark some answers...? __________________ 77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo

08-21-2012, 04:17 PM	#5
PBFAB.COM Senior Member Join Date: Dec 2003 Location: Mesa,Az Posts: 3,981	Re: Dropmember LS Swap Help... The 4L80 e is much larger than the 4L60 and you will need to modify the floor pan/trans cover for clearance. If you aren't planning on putting down huge horsepower I would recommend sticking with the smaller 4L60e. Nate __________________ www.PorterbuiltFabrication.com Phone: 480-297-2621 E-mail: sales@pbfab.com Find us on FaceBook under Porterbuilt Fabrication Specializing in Chassis and Suspension Components for your Classic Chevrolet Truck. We offer components from the following manufacturers: Porterbuilt Accuair Ridetech (Air Ride Technologies) Air Lift Wilwood Intro Unisteer ECE Gotta Show Air Lift Borgeson CPP Supporting this forum since 2003!

08-21-2012, 04:51 PM	#6
JNJchev77 Registered Cruiser Join Date: Mar 2010 Location: Mesa, AZ Posts: 918	Re: Dropmember LS Swap Help... Thanks Nate! I have my floor pan "tunneled" and "clearanced" the trans cover, but didn't realize the 4l80e was that much bigger and was built a little more, I don't really need the beefed up trans. I'm only going to be running about 350hp. Justin __________________ 77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo

08-21-2012, 06:16 PM	#7
Pro Performance Registered User Join Date: Aug 2010 Location: AZ Posts: 3,069	Re: Dropmember LS Swap Help... The 4L80 is also longer as well, so you would need to modify your drive shaft.

08-21-2012, 06:46 PM	#8
JNJchev77 Registered Cruiser Join Date: Mar 2010 Location: Mesa, AZ Posts: 918	Re: Dropmember LS Swap Help... I did find that measurement , so I was planning on that. Was just concerned about the lower firewall. The 4l60e is basically the 700r4 but electronic and... newer/stronger? If I go with the 2000+ version? __________________ 77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo

08-22-2012, 02:15 AM	#9
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Dropmember LS Swap Help... Worse case you can have the 4l60 beefed up if you want more power.Yeah i think the 4l60 is just a 700r4 updated.



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