ls3 swap 4l60e hits floor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67 stable · 10-22-2019, 08:13 AM

ls3 4l60e swap, transmissor hits floor, engine has a 8 Degree rake
stock oil pan, suspension drop. trans dept motor mounts.
any way to lower transmission from hitting floor ?

ls1nova71 · 10-22-2019, 09:24 AM

Stock LS3 oil pan? Those usually wont work on a truck, so maybe the engine is too high?

**PGSigns** · 10-22-2019, 11:57 AM

Ok 8 degrees in reference to what and that trans should clear the floor. Pictures would be a big help.
Jimmy

**mongocanfly** · 10-22-2019, 01:07 PM

(Hitting the floor).....do you mean floorboard of truck?
(8 degs rake)....is your frame level..0 degs.... and your driveline is 8 deg down in the rear ....is this what your sayin?
If your already at 8 deg down in the rear that's to much ..should be around 3 deg downward angle...but it needs to match the differential upward angle...what is your diff angle when the truck is sitting on all 4s?
You may need to do a trans tunnel or lower engine
Like said some pics will help as well as what your putting it in..

prodjay10 · 10-22-2019, 02:16 PM

Which perch/motor mount/ adapter setup you using? What’s this going in?

**Captainfab** · 10-22-2019, 11:10 PM

Knowing the year of truck would help with giving possible solutions.

67 stable · 10-22-2019, 11:57 PM

its a 67 c-10

Ghost's68 · 10-23-2019, 01:34 AM

I’ve got a 68 I LS swapped an LS3 and 4L80, running CPP engine mounts, DD sliders and stock trans mount I think I was roughly 4.5* down slope. 8 sounds high.

67 stable · 12-09-2019, 10:53 PM

Quote:

Originally Posted by Ghost's68

I’ve got a 68 I LS swapped an LS3 and 4L80, running CPP engine mounts, DD sliders and stock trans mount I think I was roughly 4.5* down slope. 8 sounds high.

Installed the holley 302-2 oil pan and moved the engine two inches forward to the v-8 holes, a lot of clearance but still sits raked and tranny hit floor
using the trans depot engine mount and stock frame mount
anyway to lower the engine with different mounts ?

prodjay10 · 12-09-2019, 11:22 PM

I used the stock v8 perches in the v8 position with 1 inch set back plates and it doesn’t hit floor. Truck oil pan. I have a couple inches of clearance between tunnel and transmission. Angle is close but I have space to dial it in.

With a 1 inch setback the engine is in the same spot as a 350. I will be using another set of adapter plates so I can do a 2 inch setback to be able to use the original driveshaft. As it is, the yoke is not as far in as I’d like.
Posted via Mobile Device

67 stable · 10-23-2019, 08:49 AM

can anyone recommend a oil pan swap ?
Okay i think i might have figured out the clearance problem.
we used the rear ( six cylinder) engine mount holes, because of the oil pan clearance.
we can movie the engine forward, that might level it out, but i don't see how it will lower the tranny.
how do you upload pics ?

**mongocanfly** · 10-23-2019, 01:42 PM

http://67-72chevytrucks.com/vboard/s...sting+pictures

**mongocanfly** · 10-23-2019, 01:43 PM

For pics...
http://67-72chevytrucks.com/vboard/s...sting+pictures

prodjay10 · 12-09-2019, 11:25 PM

This is in a 1971 c10 with a low hump.

prodjay10 · 12-10-2019, 10:31 AM

Looks like these mounts make your engine sit too high. Same thing happened to me with the square body c20 mounts.

10-22-2019, 08:13 AM	#1
67 stable Registered User Join Date: Sep 2018 Location: idaho Posts: 11	ls3 swap 4l60e hits floor ls3 4l60e swap, transmissor hits floor, engine has a 8 Degree rake stock oil pan, suspension drop. trans dept motor mounts. any way to lower transmission from hitting floor ? Last edited by 67 stable; 10-22-2019 at 08:15 AM. Reason: adding

10-22-2019, 09:24 AM	#2
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: ls3 swap 4l60e hits floor Stock LS3 oil pan? Those usually wont work on a truck, so maybe the engine is too high? __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

10-22-2019, 11:57 AM	#3
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: ls3 swap 4l60e hits floor Ok 8 degrees in reference to what and that trans should clear the floor. Pictures would be a big help. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

10-22-2019, 01:07 PM	#4
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: ls3 swap 4l60e hits floor (Hitting the floor).....do you mean floorboard of truck? (8 degs rake)....is your frame level..0 degs.... and your driveline is 8 deg down in the rear ....is this what your sayin? If your already at 8 deg down in the rear that's to much ..should be around 3 deg downward angle...but it needs to match the differential upward angle...what is your diff angle when the truck is sitting on all 4s? You may need to do a trans tunnel or lower engine Like said some pics will help as well as what your putting it in.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

10-22-2019, 02:16 PM	#5
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: ls3 swap 4l60e hits floor Which perch/motor mount/ adapter setup you using? What’s this going in?

10-22-2019, 11:10 PM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: ls3 swap 4l60e hits floor Knowing the year of truck would help with giving possible solutions. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

10-22-2019, 11:57 PM	#7
67 stable Registered User Join Date: Sep 2018 Location: idaho Posts: 11	Re: ls3 swap 4l60e hits floor its a 67 c-10

10-23-2019, 01:34 AM	#8
Ghost's68 Registered User Join Date: Jun 2016 Location: American Canyon, CA Posts: 253	Re: ls3 swap 4l60e hits floor I’ve got a 68 I LS swapped an LS3 and 4L80, running CPP engine mounts, DD sliders and stock trans mount I think I was roughly 4.5* down slope. 8 sounds high.

12-09-2019, 11:22 PM	#10
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	I used the stock v8 perches in the v8 position with 1 inch set back plates and it doesn’t hit floor. Truck oil pan. I have a couple inches of clearance between tunnel and transmission. Angle is close but I have space to dial it in. With a 1 inch setback the engine is in the same spot as a 350. I will be using another set of adapter plates so I can do a 2 inch setback to be able to use the original driveshaft. As it is, the yoke is not as far in as I’d like. Posted via Mobile Device

10-23-2019, 08:49 AM	#11
67 stable Registered User Join Date: Sep 2018 Location: idaho Posts: 11	Re: ls3 swap 4l60e hits floor can anyone recommend a oil pan swap ? Okay i think i might have figured out the clearance problem. we used the rear ( six cylinder) engine mount holes, because of the oil pan clearance. we can movie the engine forward, that might level it out, but i don't see how it will lower the tranny. how do you upload pics ?

10-23-2019, 01:42 PM	#12
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: ls3 swap 4l60e hits floor http://67-72chevytrucks.com/vboard/s...sting+pictures __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

10-23-2019, 01:43 PM	#13
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: ls3 swap 4l60e hits floor For pics... http://67-72chevytrucks.com/vboard/s...sting+pictures __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

12-09-2019, 11:25 PM	#14
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: ls3 swap 4l60e hits floor This is in a 1971 c10 with a low hump.

12-10-2019, 10:31 AM	#15
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: ls3 swap 4l60e hits floor Looks like these mounts make your engine sit too high. Same thing happened to me with the square body c20 mounts.



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