Advice wanted, LQ9 on a 64 1/2 ton frame - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dino Driver · 03-21-2011, 02:38 AM

I purchased the motor mounts that Early Classics sells after seeing the install pics from this board. Once I got them, trimmed the frame rails and installed them, installed the LQ9 with 4L80E tranny I found an issue. With the motor at 4 degrees and the pan of the tranny level, the centerline of the output shaft of the tranny is 5/8" over the top rail. Stan at ECE has been very helpful but is at a loss about how to solve the issue. The motor sit awesome between the rails, there is 1" clearance on the pan. What issues might I have if I tilt the motor down more to get the tranny output below the top of the frame rail. Does it need to be below? is there enough clearance for an unaltered cab?

mwilliams5891 · 03-21-2011, 03:22 AM

sorry I know this doesnt help but I am interested....so subscribed.....and its nice to see someone from Oregon....

67C10BUB · 03-21-2011, 01:45 PM

I wish I could help, but I put that kit in a 67 and it fit perfectly.

**Clyde65** · 03-21-2011, 02:47 PM

I have a 4.8 in mine and didnt have that issue, used those perches also.

Dino Driver · 03-21-2011, 03:37 PM

Clyde, do you remember what the elevation of the tailshaft was? was it below the top of the frame rail?

**Clyde65** · 03-21-2011, 04:53 PM

You know what, I am stupid, I used the POL perches not the ECE perches. I am sorry!

**TR65** · 03-21-2011, 09:54 PM

Dino,

The original 283 in my 65 had the crank shaft centerline 11" above the bottom of the front cross member (board clamped to the bottom of the cross member, measured up to the crank center line at the harmonic balancer).

I set my LS2 crank center line 11-5/8". At a 3 degree angle (low at back) the transmission snout is about at the center of the frame rail (but it is a T56). I have about 1/8" clearance with the cab floor but it is a low hump cab floor.

Hope this helps some.

TR

structures · 03-23-2011, 08:41 PM

Here's some measurements I took of my 4.8l 4l60e in my 65. I used the ECE mounts. My tranny pan slopes a bit to the rear, not much. I took a look at my 03 Z71 and the tranny pan slopes a bit to the rear also. Do you have any pics of your setup?

Dino Driver · 03-31-2011, 02:16 AM

I am now revisiting the 4L80 transmission. Although there is not a huge length difference, there is an overall size difference and I'm certain a 4L65 (which was origianlly behind this motor when it was in a 2003 Silverado SS) will be a better fit. From what I have gathered, the 4L70 would be even better. The 4L60, 65 and 70 all have the same dimensions but the 65 and 70 will not work where a 60 has operated because of different style of sensors.

03-21-2011, 02:38 AM	#1
Dino Driver Registered User Join Date: Mar 2011 Location: Portland, Oregon Posts: 107	Advice wanted, LQ9 on a 64 1/2 ton frame I purchased the motor mounts that Early Classics sells after seeing the install pics from this board. Once I got them, trimmed the frame rails and installed them, installed the LQ9 with 4L80E tranny I found an issue. With the motor at 4 degrees and the pan of the tranny level, the centerline of the output shaft of the tranny is 5/8" over the top rail. Stan at ECE has been very helpful but is at a loss about how to solve the issue. The motor sit awesome between the rails, there is 1" clearance on the pan. What issues might I have if I tilt the motor down more to get the tranny output below the top of the frame rail. Does it need to be below? is there enough clearance for an unaltered cab?

03-21-2011, 03:22 AM	#2
mwilliams5891 Registered User Join Date: Aug 2010 Location: Springfield, Oregon Posts: 164	Re: Advice wanted, LQ9 on a 64 1/2 ton frame sorry I know this doesnt help but I am interested....so subscribed.....and its nice to see someone from Oregon.... __________________ -1969 C/10 Short Step soon to be Brand NEW Ls6/T56 -03 Mazda Protege 5 -WTB 1970 Chevelle project

03-21-2011, 01:45 PM	#3
67C10BUB Registered User Join Date: Aug 2010 Location: Alta Loma, CA Posts: 610	Re: Advice wanted, LQ9 on a 64 1/2 ton frame I wish I could help, but I put that kit in a 67 and it fit perfectly. __________________ 67 5.3L Build

03-21-2011, 02:47 PM	#4
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Advice wanted, LQ9 on a 64 1/2 ton frame I have a 4.8 in mine and didnt have that issue, used those perches also. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

03-21-2011, 03:37 PM	#5
Dino Driver Registered User Join Date: Mar 2011 Location: Portland, Oregon Posts: 107	Re: Advice wanted, LQ9 on a 64 1/2 ton frame Clyde, do you remember what the elevation of the tailshaft was? was it below the top of the frame rail?

03-21-2011, 04:53 PM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Advice wanted, LQ9 on a 64 1/2 ton frame You know what, I am stupid, I used the POL perches not the ECE perches. I am sorry! __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!* Last edited by Clyde65; 03-21-2011 at 04:55 PM.

03-21-2011, 09:54 PM	#7
TR65 Senior Member Join Date: Nov 2007 Location: Greenville, SC Posts: 873	Re: Advice wanted, LQ9 on a 64 1/2 ton frame Dino, The original 283 in my 65 had the crank shaft centerline 11" above the bottom of the front cross member (board clamped to the bottom of the cross member, measured up to the crank center line at the harmonic balancer). I set my LS2 crank center line 11-5/8". At a 3 degree angle (low at back) the transmission snout is about at the center of the frame rail (but it is a T56). I have about 1/8" clearance with the cab floor but it is a low hump cab floor. Hope this helps some. TR __________________ 1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880

03-23-2011, 08:41 PM	#8
structures Registered User Join Date: Nov 2009 Location: OK Posts: 274	Re: Advice wanted, LQ9 on a 64 1/2 ton frame Here's some measurements I took of my 4.8l 4l60e in my 65. I used the ECE mounts. My tranny pan slopes a bit to the rear, not much. I took a look at my 03 Z71 and the tranny pan slopes a bit to the rear also. Do you have any pics of your setup? __________________ Robert 1965 Chevy C10 http://67-72chevytrucks.com/vboard/s...d.php?t=374373 1997 Chevy K2500 6.5 diesel

03-31-2011, 02:16 AM	#9
Dino Driver Registered User Join Date: Mar 2011 Location: Portland, Oregon Posts: 107	Re: Advice wanted, LQ9 on a 64 1/2 ton frame I am now revisiting the 4L80 transmission. Although there is not a huge length difference, there is an overall size difference and I'm certain a 4L65 (which was origianlly behind this motor when it was in a 2003 Silverado SS) will be a better fit. From what I have gathered, the 4L70 would be even better. The 4L60, 65 and 70 all have the same dimensions but the 65 and 70 will not work where a 60 has operated because of different style of sensors. Attached Images



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