just to add more info on "Hi Hump" vs" Low Hump' trans covers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

into69z · 01-16-2011, 01:49 PM

I swapped a 454 into my 69 a couple of years ago. The ruck was orginal with a 350/turbo 400 and a factory low hump trans cover. I think I know why the factory put a hi hump with big block/400 applications. I have spent two days trying to replace the oil pan gasket on my truck. I finally slid the trans back about 5 inches and jacked the motor uo about 5 inches to gain clearence to unbolt the oil pump and remove the 7 qt. pan. It may have been possible to just remove the hi hump(if I had one) and raise the rans high enough to get the pan off. I think sometimes you just can't beat the engineering of GM.

SWEET7T · 01-16-2011, 03:54 PM

Great

Something to look forward to.

I'm looking at doing a 454/4L80E on my low hump.

Tx Firefighter · 01-16-2011, 04:17 PM

In the past, I've built two big block trucks with low hump cabs. Both of them worked fine as long as I had nice new cab mounts. 40 year old saggy cab mounts always let the cab rub the transmission. Some fresh ones and you had enough clearance to pass your hand between the cab and trans.

Never-the-less, changing a big block pan gasket brings the suck no matter which cab you have. I did rod and main bearings, oil pump and pan gasket on my 454 dually welding rig last summer and sprung for the nice Felpro one piece gasket and it made the job so much easier. Still, sucked though.

Longhorn Man · 01-16-2011, 07:38 PM

brings the suck... LMAO!!!!!!
one million points for kevin!

MistaGavin · 01-24-2011, 02:19 AM

Kind of off topic but just to be sure if I get a new carpet for my truck I need a high hump carpet? Factory 400 big block auto.

mwilliams5891 · 01-24-2011, 04:19 AM

I agree with the 100 points! nothin better than "Big the suck"

haven't heard anything like that since the army

**'70_402** · 01-24-2011, 09:37 AM

Quote:

Originally Posted by Longhorn Man

brings the suck... LMAO!!!!!!
one million points for kevin!

haha.. i was thinking the same thing.. lol...

MistaGavin · 01-25-2011, 04:27 AM

Quote:

Originally Posted by MistaGavin

Kind of off topic but just to be sure if I get a new carpet for my truck I need a high hump carpet? Factory 400 big block auto.

??

**Dieselwrencher** · 01-25-2011, 06:00 AM

Quote:

Originally Posted by MistaGavin

Kind of off topic but just to be sure if I get a new carpet for my truck I need a high hump carpet? Factory 400 big block auto.

Yes you will need a high hump carpet kit.

**Dieselwrencher** · 01-25-2011, 06:02 AM

Quote:

Originally Posted by Tx Firefighter

In the past, I've built two big block trucks with low hump cabs. Both of them worked fine as long as I had nice new cab mounts. 40 year old saggy cab mounts always let the cab rub the transmission. Some fresh ones and you had enough clearance to pass your hand between the cab and trans.

Never-the-less, changing a big block pan gasket brings the suck no matter which cab you have. I did rod and main bearings, oil pump and pan gasket on my 454 dually welding rig last summer and sprung for the nice Felpro one piece gasket and it made the job so much easier. Still, sucked though.

I always loved those one piece oil pan gaskets. When they first came out they were pricey, but still way nicer than fighting a 4 piece PITA. Nice tip!

01-16-2011, 01:49 PM	#1
into69z "brand new second-hand" Join Date: Feb 2007 Location: White House, Tennessee Posts: 526	just to add more info on "Hi Hump" vs" Low Hump' trans covers I swapped a 454 into my 69 a couple of years ago. The ruck was orginal with a 350/turbo 400 and a factory low hump trans cover. I think I know why the factory put a hi hump with big block/400 applications. I have spent two days trying to replace the oil pan gasket on my truck. I finally slid the trans back about 5 inches and jacked the motor uo about 5 inches to gain clearence to unbolt the oil pump and remove the 7 qt. pan. It may have been possible to just remove the hi hump(if I had one) and raise the rans high enough to get the pan off. I think sometimes you just can't beat the engineering of GM. __________________ Steve 69 3/4t custom camper tilt,am/fm,speed warning,air gauge,buddy buckets,aux battery, big block,p/s,p/b,a/c 67 Camaro 96 Impala ss-sold 04 hybrid Honda-saving gas for the blue truck!:b69:

01-16-2011, 03:54 PM	#2
SWEET7T Try spinnin 4 rear tars Join Date: Sep 2003 Location: Salt Lake City, Utah Posts: 757	Re: just to add more info on "Hi Hump" vs" Low Hump' trans covers Great Something to look forward to. I'm looking at doing a 454/4L80E on my low hump. __________________ SWEET7T 1970 C10, 2wd, LB, 307/TH350/3.08. PS, PB

01-16-2011, 04:17 PM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: just to add more info on "Hi Hump" vs" Low Hump' trans covers In the past, I've built two big block trucks with low hump cabs. Both of them worked fine as long as I had nice new cab mounts. 40 year old saggy cab mounts always let the cab rub the transmission. Some fresh ones and you had enough clearance to pass your hand between the cab and trans. Never-the-less, changing a big block pan gasket brings the suck no matter which cab you have. I did rod and main bearings, oil pump and pan gasket on my 454 dually welding rig last summer and sprung for the nice Felpro one piece gasket and it made the job so much easier. Still, sucked though. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 01-16-2011 at 04:19 PM.

01-16-2011, 07:38 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: just to add more info on "Hi Hump" vs" Low Hump' trans covers brings the suck... LMAO!!!!!! one million points for kevin!

01-24-2011, 02:19 AM	#5
MistaGavin Registered User Join Date: Nov 2010 Location: Fairbanks Alaska Posts: 126	Re: just to add more info on "Hi Hump" vs" Low Hump' trans covers Kind of off topic but just to be sure if I get a new carpet for my truck I need a high hump carpet? Factory 400 big block auto. __________________ You're not old, it IS loud! 1970 CST-10 BB 400

01-24-2011, 04:19 AM	#6
mwilliams5891 Registered User Join Date: Aug 2010 Location: Springfield, Oregon Posts: 164	Re: just to add more info on "Hi Hump" vs" Low Hump' trans covers I agree with the 100 points! nothin better than "Big the suck" haven't heard anything like that since the army __________________ -1969 C/10 Short Step soon to be Brand NEW Ls6/T56 -03 Mazda Protege 5 -WTB 1970 Chevelle project



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